| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<!-- XBRL Document Created with Wdesk from Workiva --> |
<!-- Copyright 2023 Workiva --> |
<!-- r:78b44335-0d11-4d8c-90c0-7f7d9b153964,g:2833cb24-9f1c-40b7-a48b-4c68327dbf60 --> |
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/> |
| <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/> |
| <link:roleRef roleURI="http://www.comcast.com/role/Cover" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#Cover"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/Cover" xlink:type="extended" id="ide4fd7802adc41c4876e230599760190_Cover"> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentInformationLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_bb2d8ce2-2e6c-4ff3-bfd6-f267cb58ff74" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentType"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_DocumentType_bb2d8ce2-2e6c-4ff3-bfd6-f267cb58ff74" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentAnnualReport_959f8137-daef-404f-94f4-35dfb414f438" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentAnnualReport"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_DocumentAnnualReport_959f8137-daef-404f-94f4-35dfb414f438" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_f55a8643-88d6-4cb0-a222-718971cdb2d0" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentPeriodEndDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_DocumentPeriodEndDate_f55a8643-88d6-4cb0-a222-718971cdb2d0" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_c486074f-b50f-4887-a797-3a1d6333dbfa" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CurrentFiscalYearEndDate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_CurrentFiscalYearEndDate_c486074f-b50f-4887-a797-3a1d6333dbfa" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_fbe9892f-83b2-401c-8dfd-c323f702a2a1" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentTransitionReport"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_DocumentTransitionReport_fbe9892f-83b2-401c-8dfd-c323f702a2a1" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_a7e35d12-05d2-4625-963f-4d40f33e6e0d" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFileNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityFileNumber_a7e35d12-05d2-4625-963f-4d40f33e6e0d" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_4e76fbfe-9615-420c-944e-a61eca20529f" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityRegistrantName"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityRegistrantName_4e76fbfe-9615-420c-944e-a61eca20529f" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_df9e877d-4185-4133-a94d-cda933ca45da" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityTaxIdentificationNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityTaxIdentificationNumber_df9e877d-4185-4133-a94d-cda933ca45da" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_a2ab0e20-04bd-4d32-b324-2992cfb02533" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityIncorporationStateCountryCode"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityIncorporationStateCountryCode_a2ab0e20-04bd-4d32-b324-2992cfb02533" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_de446d34-15c1-4960-83e3-b14b45a971c7" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressAddressLine1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityAddressAddressLine1_de446d34-15c1-4960-83e3-b14b45a971c7" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_55c8d886-0387-41e9-b91f-19b46f89d795" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressCityOrTown"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityAddressCityOrTown_55c8d886-0387-41e9-b91f-19b46f89d795" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_0f60d2e7-7e73-4c0a-ab38-7440d3839654" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressStateOrProvince"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityAddressStateOrProvince_0f60d2e7-7e73-4c0a-ab38-7440d3839654" xlink:type="arc" order="11"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_48fe6b14-13a0-47ec-a3c5-46ca21fef3c5" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityAddressPostalZipCode"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityAddressPostalZipCode_48fe6b14-13a0-47ec-a3c5-46ca21fef3c5" xlink:type="arc" order="12"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_6b9844fe-7061-4609-b72d-fa5076351703" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_CityAreaCode"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_CityAreaCode_6b9844fe-7061-4609-b72d-fa5076351703" xlink:type="arc" order="13"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_446e26da-c167-4123-bfb4-add73687460f" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LocalPhoneNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_LocalPhoneNumber_446e26da-c167-4123-bfb4-add73687460f" xlink:type="arc" order="14"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_1af6fcbf-0b4b-428d-a118-90d113f5b1da" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_Security12bTitle"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_Security12bTitle_1af6fcbf-0b4b-428d-a118-90d113f5b1da" xlink:type="arc" order="15"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_d4d373cd-5d87-4e57-9d15-005dd2428210" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_TradingSymbol"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_TradingSymbol_d4d373cd-5d87-4e57-9d15-005dd2428210" xlink:type="arc" order="16"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_82a9d9d8-112e-4872-8f42-a296175582b7" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_SecurityExchangeName"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_SecurityExchangeName_82a9d9d8-112e-4872-8f42-a296175582b7" xlink:type="arc" order="17"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityWellKnownSeasonedIssuer_8715c8bc-61cf-4426-b1f0-502c9856ec99" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityWellKnownSeasonedIssuer"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityWellKnownSeasonedIssuer_8715c8bc-61cf-4426-b1f0-502c9856ec99" xlink:type="arc" order="18"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityVoluntaryFilers_460b5f95-ed5c-4a2b-86fc-7573813e0187" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityVoluntaryFilers"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityVoluntaryFilers_460b5f95-ed5c-4a2b-86fc-7573813e0187" xlink:type="arc" order="19"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_c8a40ac4-bb5c-45f8-b90d-14220a5a956c" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCurrentReportingStatus"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityCurrentReportingStatus_c8a40ac4-bb5c-45f8-b90d-14220a5a956c" xlink:type="arc" order="20"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_cfd50fe9-85b0-4687-8882-d01d40c48540" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityInteractiveDataCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityInteractiveDataCurrent_cfd50fe9-85b0-4687-8882-d01d40c48540" xlink:type="arc" order="21"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_c3d0a146-843b-4cbb-a7c3-a38eeab376b8" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityFilerCategory"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityFilerCategory_c3d0a146-843b-4cbb-a7c3-a38eeab376b8" xlink:type="arc" order="22"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_7b8b1a23-30e7-4b95-b443-5c3d2dc1844d" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntitySmallBusiness"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntitySmallBusiness_7b8b1a23-30e7-4b95-b443-5c3d2dc1844d" xlink:type="arc" order="23"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_9ccad54d-028c-4dc4-861a-eccedae92823" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityEmergingGrowthCompany"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityEmergingGrowthCompany_9ccad54d-028c-4dc4-861a-eccedae92823" xlink:type="arc" order="24"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_IcfrAuditorAttestationFlag_9aa31f79-7ac6-4131-992c-94764510d49f" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_IcfrAuditorAttestationFlag"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_IcfrAuditorAttestationFlag_9aa31f79-7ac6-4131-992c-94764510d49f" xlink:type="arc" order="25"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_08ba12aa-0da4-4292-a89f-7e08563e698d" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityShellCompany"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityShellCompany_08ba12aa-0da4-4292-a89f-7e08563e698d" xlink:type="arc" order="26"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityPublicFloat_78a21bf6-15d1-4bae-a121-9242e2bc0cd4" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityPublicFloat"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityPublicFloat_78a21bf6-15d1-4bae-a121-9242e2bc0cd4" xlink:type="arc" order="27"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_942b6ae9-144c-447d-ba10-82775e4be555" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCommonStockSharesOutstanding"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_942b6ae9-144c-447d-ba10-82775e4be555" xlink:type="arc" order="28"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentsIncorporatedByReferenceTextBlock_0930d7ac-644e-4015-bd87-5ba7beb33e20" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentsIncorporatedByReferenceTextBlock"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_DocumentsIncorporatedByReferenceTextBlock_0930d7ac-644e-4015-bd87-5ba7beb33e20" xlink:type="arc" order="29"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_6cce89ee-8a44-4c16-8f76-3b77780af118" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentFiscalPeriodFocus"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_DocumentFiscalPeriodFocus_6cce89ee-8a44-4c16-8f76-3b77780af118" xlink:type="arc" order="30"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_b4144b30-2178-43e6-ac49-36745eacc8ca" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_AmendmentFlag"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_AmendmentFlag_b4144b30-2178-43e6-ac49-36745eacc8ca" xlink:type="arc" order="31"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_15b6ddc4-bab4-4ce6-858d-38314f56d176" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentFiscalYearFocus"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_DocumentFiscalYearFocus_15b6ddc4-bab4-4ce6-858d-38314f56d176" xlink:type="arc" order="32"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_a8e2aa32-d37a-4318-8587-ded4b1ccc44c" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityCentralIndexKey"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_EntityCentralIndexKey_a8e2aa32-d37a-4318-8587-ded4b1ccc44c" xlink:type="arc" order="33"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationTable_5b3d011e-bfaf-4ab0-8052-36ae9a279820" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_DocumentInformationTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_a823163b-9a4c-44d1-9245-01da0f3faa7f" xlink:to="loc_dei_DocumentInformationTable_5b3d011e-bfaf-4ab0-8052-36ae9a279820" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_26f77f1c-cf3e-4f0e-9689-2506831fd9c1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_DocumentInformationTable_5b3d011e-bfaf-4ab0-8052-36ae9a279820" xlink:to="loc_us-gaap_StatementClassOfStockAxis_26f77f1c-cf3e-4f0e-9689-2506831fd9c1" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_26f77f1c-cf3e-4f0e-9689-2506831fd9c1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_26f77f1c-cf3e-4f0e-9689-2506831fd9c1" xlink:to="loc_us-gaap_ClassOfStockDomain_26f77f1c-cf3e-4f0e-9689-2506831fd9c1_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_26f77f1c-cf3e-4f0e-9689-2506831fd9c1" xlink:to="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_644aeabb-86ba-4e86-8698-3aa6c1f6d74d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_us-gaap_CommonClassAMember_644aeabb-86ba-4e86-8698-3aa6c1f6d74d" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_Notes0000PercentDue2026Member_ac7d0793-cf3d-4bd8-bb03-4ff43457c3f4" xlink:href="cmcsa-20221231.xsd#cmcsa_Notes0000PercentDue2026Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_cmcsa_Notes0000PercentDue2026Member_ac7d0793-cf3d-4bd8-bb03-4ff43457c3f4" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_Notes0.250percentDue2027Member_2bb0b69a-9ab7-44b8-80f7-d7a73d25d923" xlink:href="cmcsa-20221231.xsd#cmcsa_Notes0.250percentDue2027Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_cmcsa_Notes0.250percentDue2027Member_2bb0b69a-9ab7-44b8-80f7-d7a73d25d923" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_Notes1.500percentDue2029Member_0302ec52-653c-45ef-9f18-03dcf6be0d4c" xlink:href="cmcsa-20221231.xsd#cmcsa_Notes1.500percentDue2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_cmcsa_Notes1.500percentDue2029Member_0302ec52-653c-45ef-9f18-03dcf6be0d4c" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_Notes0250PercentDue2029Member_0aebecf1-652b-44bf-8a47-0cea2164c0d8" xlink:href="cmcsa-20221231.xsd#cmcsa_Notes0250PercentDue2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_cmcsa_Notes0250PercentDue2029Member_0aebecf1-652b-44bf-8a47-0cea2164c0d8" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_Notes0.750percentdue2032Member_5870b6ae-7b95-4b84-9754-ce5550093d8d" xlink:href="cmcsa-20221231.xsd#cmcsa_Notes0.750percentdue2032Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_cmcsa_Notes0.750percentdue2032Member_5870b6ae-7b95-4b84-9754-ce5550093d8d" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_Notes1.875percentdue2036Member_9b503f31-1b8c-4686-a853-6e0a9b31f2b2" xlink:href="cmcsa-20221231.xsd#cmcsa_Notes1.875percentdue2036Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_cmcsa_Notes1.875percentdue2036Member_9b503f31-1b8c-4686-a853-6e0a9b31f2b2" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_Notes1.250percentdue2040Member_807d7305-271a-48ca-8b88-af5a599579f9" xlink:href="cmcsa-20221231.xsd#cmcsa_Notes1.250percentdue2040Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_cmcsa_Notes1.250percentdue2040Member_807d7305-271a-48ca-8b88-af5a599579f9" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_Notes5.50PercentDue2029Member_c01e08d8-a7d8-4e9a-b689-808e5da2708f" xlink:href="cmcsa-20221231.xsd#cmcsa_Notes5.50PercentDue2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_cmcsa_Notes5.50PercentDue2029Member_c01e08d8-a7d8-4e9a-b689-808e5da2708f" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ExchangeableSubordinatedDebentures2.0PercentDue2029Member_27aa3d80-e8c2-4752-baee-ed9be518c665" xlink:href="cmcsa-20221231.xsd#cmcsa_ExchangeableSubordinatedDebentures2.0PercentDue2029Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_cmcsa_ExchangeableSubordinatedDebentures2.0PercentDue2029Member_27aa3d80-e8c2-4752-baee-ed9be518c665" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_0fc71f02-7a38-4179-af92-6a400e3bf712" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_63a7a6c0-e0a5-49a3-996d-34389e8ead98" xlink:to="loc_us-gaap_CommonClassBMember_0fc71f02-7a38-4179-af92-6a400e3bf712" xlink:type="arc" order="10"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/ConsolidatedBalanceSheet" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#ConsolidatedBalanceSheet"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/ConsolidatedBalanceSheet" xlink:type="extended" id="i7fe884b336ea4093b34d9fbd478c5d92_ConsolidatedBalanceSheet"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_e59c0dbc-d69b-4793-9944-a5ba5545e4a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e59c0dbc-d69b-4793-9944-a5ba5545e4a2" xlink:to="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrentAbstract_16d028f3-8983-46db-81d2-d2318890d47c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrentAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_us-gaap_AssetsCurrentAbstract_16d028f3-8983-46db-81d2-d2318890d47c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6bde2063-933e-4afc-ac98-7bfcb8e61f39" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_16d028f3-8983-46db-81d2-d2318890d47c" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_6bde2063-933e-4afc-ac98-7bfcb8e61f39" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_3fa113b8-7818-4b24-bea0-cab2af4f4a03" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableNetCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_16d028f3-8983-46db-81d2-d2318890d47c" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_3fa113b8-7818-4b24-bea0-cab2af4f4a03" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_991c5c20-c514-4383-9b1a-e41b50b8e735" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssetsCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_16d028f3-8983-46db-81d2-d2318890d47c" xlink:to="loc_us-gaap_OtherAssetsCurrent_991c5c20-c514-4383-9b1a-e41b50b8e735" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_15568174-3280-4153-a937-983cb47768f8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsCurrentAbstract_16d028f3-8983-46db-81d2-d2318890d47c" xlink:to="loc_us-gaap_AssetsCurrent_15568174-3280-4153-a937-983cb47768f8" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent_52739fa2-5e9e-4ca7-99b3-a82c7a998da7" xlink:href="cmcsa-20221231.xsd#cmcsa_FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_cmcsa_FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent_52739fa2-5e9e-4ca7-99b3-a82c7a998da7" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermInvestments_116a6db3-0f7a-45b7-bfcf-ff86b6cea360" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermInvestments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_us-gaap_LongTermInvestments_116a6db3-0f7a-45b7-bfcf-ff86b6cea360" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_InvestmentSecuringCollateralizedObligation_556fabc3-2e4a-4cd8-b312-b59b611ed1e5" xlink:href="cmcsa-20221231.xsd#cmcsa_InvestmentSecuringCollateralizedObligation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_cmcsa_InvestmentSecuringCollateralizedObligation_556fabc3-2e4a-4cd8-b312-b59b611ed1e5" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_49276975-ef87-4224-ba6d-ebeed38a099c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_49276975-ef87-4224-ba6d-ebeed38a099c" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_eada1969-3bb2-43ac-9e73-7451b431dc6a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_us-gaap_Goodwill_eada1969-3bb2-43ac-9e73-7451b431dc6a" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedFranchiseRights_59f06674-aa73-430e-aeae-d874380d3437" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedFranchiseRights"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_us-gaap_IndefiniteLivedFranchiseRights_59f06674-aa73-430e-aeae-d874380d3437" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsNet_3e631088-535f-43ee-a004-4e4351c963aa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherIntangibleAssetsNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_us-gaap_OtherIntangibleAssetsNet_3e631088-535f-43ee-a004-4e4351c963aa" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_dc213b69-d996-4f65-ae76-88077b702edf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssetsNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_dc213b69-d996-4f65-ae76-88077b702edf" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_00e78568-90c7-4c15-ac23-fb07a26df6e2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_2514ec49-cd81-423d-b2d5-95d285445625" xlink:to="loc_us-gaap_Assets_00e78568-90c7-4c15-ac23-fb07a26df6e2" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e59c0dbc-d69b-4793-9944-a5ba5545e4a2" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_b152aaf9-6fe3-4e66-b42a-88de5eee416c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrentAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_b152aaf9-6fe3-4e66-b42a-88de5eee416c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_49f6e6d1-8523-4e92-9dce-13188601d75a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsPayableCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b152aaf9-6fe3-4e66-b42a-88de5eee416c" xlink:to="loc_us-gaap_AccountsPayableCurrent_49f6e6d1-8523-4e92-9dce-13188601d75a" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AccruedParticipationsAndResidualsCurrent_85b10ff7-9ff2-4c94-ba89-9fd9041b0c53" xlink:href="cmcsa-20221231.xsd#cmcsa_AccruedParticipationsAndResidualsCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b152aaf9-6fe3-4e66-b42a-88de5eee416c" xlink:to="loc_cmcsa_AccruedParticipationsAndResidualsCurrent_85b10ff7-9ff2-4c94-ba89-9fd9041b0c53" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredRevenueCurrent_dc3074f9-b04a-40ee-a066-1547cbf44e6f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredRevenueCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b152aaf9-6fe3-4e66-b42a-88de5eee416c" xlink:to="loc_us-gaap_DeferredRevenueCurrent_dc3074f9-b04a-40ee-a066-1547cbf44e6f" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_6076437a-ad47-4909-acfd-c6f841c6c729" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b152aaf9-6fe3-4e66-b42a-88de5eee416c" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_6076437a-ad47-4909-acfd-c6f841c6c729" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtCurrent_ba0324fa-b7a6-4f06-92b4-ab9f15cfe8c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b152aaf9-6fe3-4e66-b42a-88de5eee416c" xlink:to="loc_us-gaap_DebtCurrent_ba0324fa-b7a6-4f06-92b4-ab9f15cfe8c2" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_52b515d1-8cc8-42dd-9f51-e38df31c64ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_b152aaf9-6fe3-4e66-b42a-88de5eee416c" xlink:to="loc_us-gaap_LiabilitiesCurrent_52b515d1-8cc8-42dd-9f51-e38df31c64ad" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_e9911fdc-2152-4510-a643-e4104c763e73" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_e9911fdc-2152-4510-a643-e4104c763e73" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CollateralizedObligation_1aff2ad9-2594-446c-8593-f5e8c7b7c726" xlink:href="cmcsa-20221231.xsd#cmcsa_CollateralizedObligation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:to="loc_cmcsa_CollateralizedObligation_1aff2ad9-2594-446c-8593-f5e8c7b7c726" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_030ebe8d-c3a8-4323-8aba-6c1aa45258f6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_030ebe8d-c3a8-4323-8aba-6c1aa45258f6" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_8ba6e1c4-f0d1-4bf5-8d1a-675d1099a657" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherLiabilitiesNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_8ba6e1c4-f0d1-4bf5-8d1a-675d1099a657" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_ed41d896-e04d-4447-b663-569095138656" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommitmentsAndContingencies"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:to="loc_us-gaap_CommitmentsAndContingencies_ed41d896-e04d-4447-b663-569095138656" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_5637763f-7c8f-44a9-87ae-e737add065af" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_5637763f-7c8f-44a9-87ae-e737add065af" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_992d3527-0b44-4308-8cd6-fc46530f3580" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:to="loc_us-gaap_PreferredStockValue_992d3527-0b44-4308-8cd6-fc46530f3580" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_64d484fc-b28c-4f5c-9482-de275b37d841" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:to="loc_us-gaap_CommonStockValue_64d484fc-b28c-4f5c-9482-de275b37d841" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_96100c86-9c3d-44b7-b213-b3facb5bccd6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapital"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:to="loc_us-gaap_AdditionalPaidInCapital_96100c86-9c3d-44b7-b213-b3facb5bccd6" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_02e552f5-11da-4d5b-891b-3f4c561e1687" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_02e552f5-11da-4d5b-891b-3f4c561e1687" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_64722743-2d0c-430b-8d84-af63a8dc4adc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:to="loc_us-gaap_TreasuryStockValue_64722743-2d0c-430b-8d84-af63a8dc4adc" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3bafe96d-0299-486c-b357-41234de7f062" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_3bafe96d-0299-486c-b357-41234de7f062" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_d4ce3f07-166c-4cb4-a3f1-07c3a9bdbd69" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:to="loc_us-gaap_StockholdersEquity_d4ce3f07-166c-4cb4-a3f1-07c3a9bdbd69" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_bde7dc42-11c7-49c2-9690-e791d0c14285" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MinorityInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:to="loc_us-gaap_MinorityInterest_bde7dc42-11c7-49c2-9690-e791d0c14285" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_88db345d-58b6-4bf9-a685-35a7e00ed762" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_523b8a20-261b-4f7b-bb61-20d98890ebfe" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_88db345d-58b6-4bf9-a685-35a7e00ed762" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_f55fa7e4-4350-4b02-b23a-0b86f9657fe2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4f7de7b3-de52-4de1-924c-cfe3baa989dc" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_f55fa7e4-4350-4b02-b23a-0b86f9657fe2" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_23ab7ac3-bd46-4c4b-af3f-4838826c5878" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_e59c0dbc-d69b-4793-9944-a5ba5545e4a2" xlink:to="loc_us-gaap_StatementTable_23ab7ac3-bd46-4c4b-af3f-4838826c5878" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_867b75c5-4087-4318-96d0-8b63838d39cf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_23ab7ac3-bd46-4c4b-af3f-4838826c5878" xlink:to="loc_us-gaap_StatementClassOfStockAxis_867b75c5-4087-4318-96d0-8b63838d39cf" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_867b75c5-4087-4318-96d0-8b63838d39cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_867b75c5-4087-4318-96d0-8b63838d39cf" xlink:to="loc_us-gaap_ClassOfStockDomain_867b75c5-4087-4318-96d0-8b63838d39cf_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_1003ccfc-7f44-463b-b316-9df8ce4e331c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_867b75c5-4087-4318-96d0-8b63838d39cf" xlink:to="loc_us-gaap_ClassOfStockDomain_1003ccfc-7f44-463b-b316-9df8ce4e331c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_44dee030-b3da-4e70-8970-f685af3eb09a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1003ccfc-7f44-463b-b316-9df8ce4e331c" xlink:to="loc_us-gaap_CommonClassAMember_44dee030-b3da-4e70-8970-f685af3eb09a" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_703de383-bbfb-45db-be33-41b6cee1aec8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1003ccfc-7f44-463b-b316-9df8ce4e331c" xlink:to="loc_us-gaap_CommonClassBMember_703de383-bbfb-45db-be33-41b6cee1aec8" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/ConsolidatedBalanceSheetParenthetical" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#ConsolidatedBalanceSheetParenthetical"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/ConsolidatedBalanceSheetParenthetical" xlink:type="extended" id="i6c03fb2bf8c545e1bc98e3693a7350c0_ConsolidatedBalanceSheetParenthetical"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_910f53fc-842c-4f6f-a891-4b521c289183" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_caed7d4a-0b72-4e52-adf3-6d8f1c9faea5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockSharesAuthorized"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_910f53fc-842c-4f6f-a891-4b521c289183" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_caed7d4a-0b72-4e52-adf3-6d8f1c9faea5" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued_0aaa7720-4fd9-4366-bf44-f83b81fb0ebc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PreferredStockSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_910f53fc-842c-4f6f-a891-4b521c289183" xlink:to="loc_us-gaap_PreferredStockSharesIssued_0aaa7720-4fd9-4366-bf44-f83b81fb0ebc" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_45afdf21-f26b-4cb0-a08c-a2d9e2377f51" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_910f53fc-842c-4f6f-a891-4b521c289183" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_45afdf21-f26b-4cb0-a08c-a2d9e2377f51" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_f83e6f12-241e-48d1-9556-f8b24fcee60b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesAuthorized"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_910f53fc-842c-4f6f-a891-4b521c289183" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_f83e6f12-241e-48d1-9556-f8b24fcee60b" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_b38846b0-61ff-4040-b0ce-659450454b73" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesIssued"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_910f53fc-842c-4f6f-a891-4b521c289183" xlink:to="loc_us-gaap_CommonStockSharesIssued_b38846b0-61ff-4040-b0ce-659450454b73" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_e014e6b5-4dae-40bf-a891-fcbfca54ec90" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesOutstanding"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_910f53fc-842c-4f6f-a891-4b521c289183" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_e014e6b5-4dae-40bf-a891-fcbfca54ec90" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockShares_82ca0bdf-8ef4-457b-9dc9-b9d9d3b486a8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_910f53fc-842c-4f6f-a891-4b521c289183" xlink:to="loc_us-gaap_TreasuryStockShares_82ca0bdf-8ef4-457b-9dc9-b9d9d3b486a8" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_e52d1cd5-47d5-4bc4-a67d-24c56c786d4c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_910f53fc-842c-4f6f-a891-4b521c289183" xlink:to="loc_us-gaap_StatementTable_e52d1cd5-47d5-4bc4-a67d-24c56c786d4c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_ad5b2e6c-33b2-445f-a668-cf97c6315034" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_e52d1cd5-47d5-4bc4-a67d-24c56c786d4c" xlink:to="loc_us-gaap_StatementClassOfStockAxis_ad5b2e6c-33b2-445f-a668-cf97c6315034" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_ad5b2e6c-33b2-445f-a668-cf97c6315034_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_ad5b2e6c-33b2-445f-a668-cf97c6315034" xlink:to="loc_us-gaap_ClassOfStockDomain_ad5b2e6c-33b2-445f-a668-cf97c6315034_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_9d6d5571-e687-4264-a203-9ccfc56df064" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_ad5b2e6c-33b2-445f-a668-cf97c6315034" xlink:to="loc_us-gaap_ClassOfStockDomain_9d6d5571-e687-4264-a203-9ccfc56df064" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_e63330ae-6b14-47da-ae23-ff0f0d40059a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9d6d5571-e687-4264-a203-9ccfc56df064" xlink:to="loc_us-gaap_CommonClassAMember_e63330ae-6b14-47da-ae23-ff0f0d40059a" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_5381ff2b-b24a-4446-8efc-5ba9f23be3a6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_9d6d5571-e687-4264-a203-9ccfc56df064" xlink:to="loc_us-gaap_CommonClassBMember_5381ff2b-b24a-4446-8efc-5ba9f23be3a6" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/ConsolidatedStatementofChangesinEquity" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#ConsolidatedStatementofChangesinEquity"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/ConsolidatedStatementofChangesinEquity" xlink:type="extended" id="if67804dcad9a4f9f92a586ddf7493eeb_ConsolidatedStatementofChangesinEquity"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_193125de-0791-43d0-85c6-4f937e4d3a3c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_68a2e78e-3420-40e0-9fb7-d558763bf5ae" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInTemporaryEquityRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_193125de-0791-43d0-85c6-4f937e4d3a3c" xlink:to="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_68a2e78e-3420-40e0-9fb7-d558763bf5ae" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_fe0fb44d-645b-4272-a1db-932b88dd50cd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_68a2e78e-3420-40e0-9fb7-d558763bf5ae" xlink:to="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_fe0fb44d-645b-4272-a1db-932b88dd50cd" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_TemporaryEquityRedemptionOfPreferredStock_f1161604-8c16-4432-9045-883e225b9840" xlink:href="cmcsa-20221231.xsd#cmcsa_TemporaryEquityRedemptionOfPreferredStock"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_68a2e78e-3420-40e0-9fb7-d558763bf5ae" xlink:to="loc_cmcsa_TemporaryEquityRedemptionOfPreferredStock_f1161604-8c16-4432-9045-883e225b9840" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity_38c50ecf-a196-4a57-82e2-7af240c61bf5" xlink:href="cmcsa-20221231.xsd#cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_68a2e78e-3420-40e0-9fb7-d558763bf5ae" xlink:to="loc_cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterestsAttributableToTemporaryEquity_38c50ecf-a196-4a57-82e2-7af240c61bf5" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityOtherChanges_0a90b4f2-b046-482d-addc-d3b9573063f9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityOtherChanges"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_68a2e78e-3420-40e0-9fb7-d558763bf5ae" xlink:to="loc_us-gaap_TemporaryEquityOtherChanges_0a90b4f2-b046-482d-addc-d3b9573063f9" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityNetIncome_c3187910-2d06-430d-929b-ea8524439841" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TemporaryEquityNetIncome"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInTemporaryEquityRollForward_68a2e78e-3420-40e0-9fb7-d558763bf5ae" xlink:to="loc_us-gaap_TemporaryEquityNetIncome_c3187910-2d06-430d-929b-ea8524439841" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount_8211317d-3366-4139-ac5c-2f704eff4ef7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_193125de-0791-43d0-85c6-4f937e4d3a3c" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3d2bc271-737e-4344-ac71-453db4bd748d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_3d2bc271-737e-4344-ac71-453db4bd748d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_9a5d15f4-cde3-4059-b0df-b7bd2a0660ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_9a5d15f4-cde3-4059-b0df-b7bd2a0660ad" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_895d8660-4a4d-45df-9d83-999a6994890e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodValue_895d8660-4a4d-45df-9d83-999a6994890e" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_101a5b84-b1ee-4c89-83eb-e52248724fc7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan_101a5b84-b1ee-4c89-83eb-e52248724fc7" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_e6388671-a047-4687-918c-a39a7607cf63" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DividendsCommonStockCash"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:to="loc_us-gaap_DividendsCommonStockCash_e6388671-a047-4687-918c-a39a7607cf63" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_e1489258-576d-4b2f-849b-14013b042680" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_e1489258-576d-4b2f-849b-14013b042680" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterests_6ea3520e-18af-4659-af0e-1aff15955bc7" xlink:href="cmcsa-20221231.xsd#cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterests"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:to="loc_cmcsa_ContributionsFromAndDistributionsToNoncontrollingInterests_6ea3520e-18af-4659-af0e-1aff15955bc7" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityOther_b0e7b935-1484-4888-be96-6b555c73d95d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityOther"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:to="loc_us-gaap_StockholdersEquityOther_b0e7b935-1484-4888-be96-6b555c73d95d" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_e90a74ff-73ed-4d4f-8b19-77c7aae329c4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_ebec6629-9274-46ce-b3a8-5e8b9f36d383" xlink:to="loc_us-gaap_NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest_e90a74ff-73ed-4d4f-8b19-77c7aae329c4" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_ae457a7a-2f82-48cc-be26-58a2e7779ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_5cfd3261-7fc2-429d-b5d8-bb2945def9c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_193125de-0791-43d0-85c6-4f937e4d3a3c" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_5cfd3261-7fc2-429d-b5d8-bb2945def9c2" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_5fed7d98-7eb0-4881-a85c-12d3946b4484" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_193125de-0791-43d0-85c6-4f937e4d3a3c" xlink:to="loc_us-gaap_StatementTable_5fed7d98-7eb0-4881-a85c-12d3946b4484" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_bd9c1e66-d834-42aa-a6c3-779c9de777b8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5fed7d98-7eb0-4881-a85c-12d3946b4484" xlink:to="loc_us-gaap_StatementClassOfStockAxis_bd9c1e66-d834-42aa-a6c3-779c9de777b8" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_bd9c1e66-d834-42aa-a6c3-779c9de777b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_bd9c1e66-d834-42aa-a6c3-779c9de777b8" xlink:to="loc_us-gaap_ClassOfStockDomain_bd9c1e66-d834-42aa-a6c3-779c9de777b8_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_c39fca31-f3e7-4ab4-b59d-60aedea5c04f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_bd9c1e66-d834-42aa-a6c3-779c9de777b8" xlink:to="loc_us-gaap_ClassOfStockDomain_c39fca31-f3e7-4ab4-b59d-60aedea5c04f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_2ecda7b2-f889-4fa9-bf2e-d1692126c4cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_c39fca31-f3e7-4ab4-b59d-60aedea5c04f" xlink:to="loc_us-gaap_CommonClassAMember_2ecda7b2-f889-4fa9-bf2e-d1692126c4cb" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_71635546-73e0-44ed-87ab-817e6632b0dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_c39fca31-f3e7-4ab4-b59d-60aedea5c04f" xlink:to="loc_us-gaap_CommonClassBMember_71635546-73e0-44ed-87ab-817e6632b0dd" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_9e45046d-c954-4b25-94c1-448bca16a4b7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5fed7d98-7eb0-4881-a85c-12d3946b4484" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_9e45046d-c954-4b25-94c1-448bca16a4b7" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_9e45046d-c954-4b25-94c1-448bca16a4b7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_9e45046d-c954-4b25-94c1-448bca16a4b7" xlink:to="loc_us-gaap_EquityComponentDomain_9e45046d-c954-4b25-94c1-448bca16a4b7_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_e3e02cb8-110a-483e-b752-06b590eccefd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_9e45046d-c954-4b25-94c1-448bca16a4b7" xlink:to="loc_us-gaap_EquityComponentDomain_e3e02cb8-110a-483e-b752-06b590eccefd" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_af7e1a0d-f0c7-49bf-82cc-956bab6e8b2c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e3e02cb8-110a-483e-b752-06b590eccefd" xlink:to="loc_us-gaap_CommonStockMember_af7e1a0d-f0c7-49bf-82cc-956bab6e8b2c" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_79d00673-5405-42e0-8d0f-cf6b16d21a13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdditionalPaidInCapitalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e3e02cb8-110a-483e-b752-06b590eccefd" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_79d00673-5405-42e0-8d0f-cf6b16d21a13" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_e06d803c-42fd-479f-8e0f-1660bb2bafb4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RetainedEarningsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e3e02cb8-110a-483e-b752-06b590eccefd" xlink:to="loc_us-gaap_RetainedEarningsMember_e06d803c-42fd-479f-8e0f-1660bb2bafb4" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_ae796e4a-87ba-40a1-8fd6-1b1be0627565" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TreasuryStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e3e02cb8-110a-483e-b752-06b590eccefd" xlink:to="loc_us-gaap_TreasuryStockMember_ae796e4a-87ba-40a1-8fd6-1b1be0627565" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4aaa418c-0c58-46cc-8d54-1a4bbae5f0ad" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e3e02cb8-110a-483e-b752-06b590eccefd" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4aaa418c-0c58-46cc-8d54-1a4bbae5f0ad" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_92c3e904-83c3-4758-bf24-898845ee1b17" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NoncontrollingInterestMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_e3e02cb8-110a-483e-b752-06b590eccefd" xlink:to="loc_us-gaap_NoncontrollingInterestMember_92c3e904-83c3-4758-bf24-898845ee1b17" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4d5f20a1-3cb9-4bbd-aff7-16746a7acfd7" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_5fed7d98-7eb0-4881-a85c-12d3946b4484" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4d5f20a1-3cb9-4bbd-aff7-16746a7acfd7" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_4d5f20a1-3cb9-4bbd-aff7-16746a7acfd7_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4d5f20a1-3cb9-4bbd-aff7-16746a7acfd7" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_4d5f20a1-3cb9-4bbd-aff7-16746a7acfd7_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_432b2a88-0012-47d5-84ce-c38436ccd78e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_4d5f20a1-3cb9-4bbd-aff7-16746a7acfd7" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_432b2a88-0012-47d5-84ce-c38436ccd78e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_66533dd1-7532-467a-95dc-6355428fd7b7" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_432b2a88-0012-47d5-84ce-c38436ccd78e" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_66533dd1-7532-467a-95dc-6355428fd7b7" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/SegmentInformationNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#SegmentInformationNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/SegmentInformationNarrativeDetails" xlink:type="extended" id="ie02c2fde91344fd18ac9b1d4023f4109_SegmentInformationNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_6b47df50-dad9-4abc-adfc-8d9208605ce2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NumberOfBusinesses_3e589b58-1abb-455c-ba41-3fc6fd7059ea" xlink:href="cmcsa-20221231.xsd#cmcsa_NumberOfBusinesses"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6b47df50-dad9-4abc-adfc-8d9208605ce2" xlink:to="loc_cmcsa_NumberOfBusinesses_3e589b58-1abb-455c-ba41-3fc6fd7059ea" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NumberOfReportableSegments_ed82c3a7-696c-41f4-b3a8-9fee469b0faf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NumberOfReportableSegments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6b47df50-dad9-4abc-adfc-8d9208605ce2" xlink:to="loc_us-gaap_NumberOfReportableSegments_ed82c3a7-696c-41f4-b3a8-9fee469b0faf" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_20388f29-770a-44fa-a01b-bc58d48c6a13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_6b47df50-dad9-4abc-adfc-8d9208605ce2" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_20388f29-770a-44fa-a01b-bc58d48c6a13" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitAxis_c808b5c2-a9a2-4431-a07a-da0af1cad201" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_20388f29-770a-44fa-a01b-bc58d48c6a13" xlink:to="loc_cmcsa_BusinessUnitAxis_c808b5c2-a9a2-4431-a07a-da0af1cad201" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_c808b5c2-a9a2-4431-a07a-da0af1cad201_default" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_cmcsa_BusinessUnitAxis_c808b5c2-a9a2-4431-a07a-da0af1cad201" xlink:to="loc_cmcsa_BusinessUnitDomain_c808b5c2-a9a2-4431-a07a-da0af1cad201_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_8d96568d-d2a4-449a-8432-ff463d9a0d55" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_cmcsa_BusinessUnitAxis_c808b5c2-a9a2-4431-a07a-da0af1cad201" xlink:to="loc_cmcsa_BusinessUnitDomain_8d96568d-d2a4-449a-8432-ff463d9a0d55" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CableCommunicationsBusinessUnitMember_c7880803-84ac-499c-8b33-712ed96bb41a" xlink:href="cmcsa-20221231.xsd#cmcsa_CableCommunicationsBusinessUnitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_8d96568d-d2a4-449a-8432-ff463d9a0d55" xlink:to="loc_cmcsa_CableCommunicationsBusinessUnitMember_c7880803-84ac-499c-8b33-712ed96bb41a" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NBCUniversalBusinessUnitMember_41925a6e-6ee1-4f7a-bce4-871a083220fb" xlink:href="cmcsa-20221231.xsd#cmcsa_NBCUniversalBusinessUnitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_8d96568d-d2a4-449a-8432-ff463d9a0d55" xlink:to="loc_cmcsa_NBCUniversalBusinessUnitMember_41925a6e-6ee1-4f7a-bce4-871a083220fb" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_SkyLimitedBusinessUnitMember_b245eba2-d494-40a2-b59c-a6928cf51d09" xlink:href="cmcsa-20221231.xsd#cmcsa_SkyLimitedBusinessUnitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_8d96568d-d2a4-449a-8432-ff463d9a0d55" xlink:to="loc_cmcsa_SkyLimitedBusinessUnitMember_b245eba2-d494-40a2-b59c-a6928cf51d09" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/SegmentInformationReportableSegmentDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#SegmentInformationReportableSegmentDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/SegmentInformationReportableSegmentDetails" xlink:type="extended" id="i73f99554d41f4944a27363837900dbde_SegmentInformationReportableSegmentDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_7579a38d-5e14-4b38-bf90-44dd97dbe756" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_b85ff5c7-37d6-43b4-8501-91fb0b5660c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationProfitLossAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7579a38d-5e14-4b38-bf90-44dd97dbe756" xlink:to="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_b85ff5c7-37d6-43b4-8501-91fb0b5660c2" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_1efaa523-2f6d-48c8-8ea7-7184c66cf725" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_b85ff5c7-37d6-43b4-8501-91fb0b5660c2" xlink:to="loc_us-gaap_Revenues_1efaa523-2f6d-48c8-8ea7-7184c66cf725" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AdjustedEBITDA_fa98c2d2-6db9-43a7-9ab3-8a9b7754415b" xlink:href="cmcsa-20221231.xsd#cmcsa_AdjustedEBITDA"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_b85ff5c7-37d6-43b4-8501-91fb0b5660c2" xlink:to="loc_cmcsa_AdjustedEBITDA_fa98c2d2-6db9-43a7-9ab3-8a9b7754415b" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_16c22664-bd13-4a74-975f-c5561e09d665" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DepreciationDepletionAndAmortization"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_b85ff5c7-37d6-43b4-8501-91fb0b5660c2" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_16c22664-bd13-4a74-975f-c5561e09d665" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_fed53272-6542-4b73-8504-48179a34bb27" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_b85ff5c7-37d6-43b4-8501-91fb0b5660c2" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_fed53272-6542-4b73-8504-48179a34bb27" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_66a94172-4cc6-4ea8-998c-8692fa2f541a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireIntangibleAssets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationProfitLossAbstract_b85ff5c7-37d6-43b4-8501-91fb0b5660c2" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_66a94172-4cc6-4ea8-998c-8692fa2f541a" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_46a27b2f-8482-4e10-b5f0-20c11dc712d8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7579a38d-5e14-4b38-bf90-44dd97dbe756" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_46a27b2f-8482-4e10-b5f0-20c11dc712d8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_9e5684de-d2b1-4cc8-a00e-937524075151" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_46a27b2f-8482-4e10-b5f0-20c11dc712d8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_9e5684de-d2b1-4cc8-a00e-937524075151" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_9e5684de-d2b1-4cc8-a00e-937524075151_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9e5684de-d2b1-4cc8-a00e-937524075151" xlink:to="loc_us-gaap_SegmentDomain_9e5684de-d2b1-4cc8-a00e-937524075151_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_29ae959f-11fe-4011-80ad-e9d4e853ac7c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_9e5684de-d2b1-4cc8-a00e-937524075151" xlink:to="loc_us-gaap_SegmentDomain_29ae959f-11fe-4011-80ad-e9d4e853ac7c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CableCommunicationsSegmentsMember_40f4bb17-2c10-43c2-9e95-9328584eea78" xlink:href="cmcsa-20221231.xsd#cmcsa_CableCommunicationsSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_29ae959f-11fe-4011-80ad-e9d4e853ac7c" xlink:to="loc_cmcsa_CableCommunicationsSegmentsMember_40f4bb17-2c10-43c2-9e95-9328584eea78" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MediaSegmentsMember_cc5d8778-a92c-48db-80f4-5cf90cf4ba73" xlink:href="cmcsa-20221231.xsd#cmcsa_MediaSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_29ae959f-11fe-4011-80ad-e9d4e853ac7c" xlink:to="loc_cmcsa_MediaSegmentsMember_cc5d8778-a92c-48db-80f4-5cf90cf4ba73" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_StudiosSegmentsMember_5c5bb948-8e8e-4b9f-b361-792bc1bab6cd" xlink:href="cmcsa-20221231.xsd#cmcsa_StudiosSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_29ae959f-11fe-4011-80ad-e9d4e853ac7c" xlink:to="loc_cmcsa_StudiosSegmentsMember_5c5bb948-8e8e-4b9f-b361-792bc1bab6cd" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ThemeParksSegmentsMember_427eebff-2d13-4631-91e5-f1cf6b60445a" xlink:href="cmcsa-20221231.xsd#cmcsa_ThemeParksSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_29ae959f-11fe-4011-80ad-e9d4e853ac7c" xlink:to="loc_cmcsa_ThemeParksSegmentsMember_427eebff-2d13-4631-91e5-f1cf6b60445a" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_SkyLimitedSegmentsMember_4c19acae-4a5e-4c1c-b2a6-9a806cfaf6d2" xlink:href="cmcsa-20221231.xsd#cmcsa_SkyLimitedSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_29ae959f-11fe-4011-80ad-e9d4e853ac7c" xlink:to="loc_cmcsa_SkyLimitedSegmentsMember_4c19acae-4a5e-4c1c-b2a6-9a806cfaf6d2" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_6aa80433-d8d9-4287-b59a-1563455a4def" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_46a27b2f-8482-4e10-b5f0-20c11dc712d8" xlink:to="loc_srt_ConsolidationItemsAxis_6aa80433-d8d9-4287-b59a-1563455a4def" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_6aa80433-d8d9-4287-b59a-1563455a4def_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_6aa80433-d8d9-4287-b59a-1563455a4def" xlink:to="loc_srt_ConsolidationItemsDomain_6aa80433-d8d9-4287-b59a-1563455a4def_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_88b291df-2883-4220-a8db-7232e583e1ce" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_6aa80433-d8d9-4287-b59a-1563455a4def" xlink:to="loc_srt_ConsolidationItemsDomain_88b291df-2883-4220-a8db-7232e583e1ce" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_d11f5392-5d25-4674-97a6-a2755de76e85" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_88b291df-2883-4220-a8db-7232e583e1ce" xlink:to="loc_us-gaap_OperatingSegmentsMember_d11f5392-5d25-4674-97a6-a2755de76e85" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_a1d2f10f-6d74-42c0-a417-991a97e18d2d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MaterialReconcilingItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_88b291df-2883-4220-a8db-7232e583e1ce" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_a1d2f10f-6d74-42c0-a417-991a97e18d2d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_fad34203-5ae0-413e-9ee7-caa29bae3f20" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntersegmentEliminationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaterialReconcilingItemsMember_a1d2f10f-6d74-42c0-a417-991a97e18d2d" xlink:to="loc_us-gaap_IntersegmentEliminationMember_fad34203-5ae0-413e-9ee7-caa29bae3f20" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_5c75cd01-58bd-43aa-8d5f-98b185cc66f4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateNonSegmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_88b291df-2883-4220-a8db-7232e583e1ce" xlink:to="loc_us-gaap_CorporateNonSegmentMember_5c75cd01-58bd-43aa-8d5f-98b185cc66f4" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitAxis_651ff0a3-7d7d-460b-b0f2-a237e128deb2" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_46a27b2f-8482-4e10-b5f0-20c11dc712d8" xlink:to="loc_cmcsa_BusinessUnitAxis_651ff0a3-7d7d-460b-b0f2-a237e128deb2" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_651ff0a3-7d7d-460b-b0f2-a237e128deb2_default" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_cmcsa_BusinessUnitAxis_651ff0a3-7d7d-460b-b0f2-a237e128deb2" xlink:to="loc_cmcsa_BusinessUnitDomain_651ff0a3-7d7d-460b-b0f2-a237e128deb2_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_a52c38be-6137-4dd6-b113-b24db57c3e43" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_cmcsa_BusinessUnitAxis_651ff0a3-7d7d-460b-b0f2-a237e128deb2" xlink:to="loc_cmcsa_BusinessUnitDomain_a52c38be-6137-4dd6-b113-b24db57c3e43" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NBCUniversalBusinessUnitMember_c0531c2d-a3ca-4723-9a9b-eaa00bc252eb" xlink:href="cmcsa-20221231.xsd#cmcsa_NBCUniversalBusinessUnitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_a52c38be-6137-4dd6-b113-b24db57c3e43" xlink:to="loc_cmcsa_NBCUniversalBusinessUnitMember_c0531c2d-a3ca-4723-9a9b-eaa00bc252eb" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_InterBusinessUnitEliminationsMember_c3ccf60e-11f6-4844-9ab9-01667cad034c" xlink:href="cmcsa-20221231.xsd#cmcsa_InterBusinessUnitEliminationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_a52c38be-6137-4dd6-b113-b24db57c3e43" xlink:to="loc_cmcsa_InterBusinessUnitEliminationsMember_c3ccf60e-11f6-4844-9ab9-01667cad034c" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/SegmentInformationIntersegmentEliminationsDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#SegmentInformationIntersegmentEliminationsDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/SegmentInformationIntersegmentEliminationsDetails" xlink:type="extended" id="i947ee6b31bca4fe2ab313ecf29bac45c_SegmentInformationIntersegmentEliminationsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_baee3603-0973-41ee-b18b-3eb1a77abef9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_7cf333ef-e061-4182-a72d-96350c883dd0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_baee3603-0973-41ee-b18b-3eb1a77abef9" xlink:to="loc_us-gaap_Revenues_7cf333ef-e061-4182-a72d-96350c883dd0" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b126b901-f41d-4e01-9def-0b87190adee0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_baee3603-0973-41ee-b18b-3eb1a77abef9" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b126b901-f41d-4e01-9def-0b87190adee0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_e23b9c26-93af-4c93-8e55-eaec720019c5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b126b901-f41d-4e01-9def-0b87190adee0" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_e23b9c26-93af-4c93-8e55-eaec720019c5" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e23b9c26-93af-4c93-8e55-eaec720019c5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e23b9c26-93af-4c93-8e55-eaec720019c5" xlink:to="loc_us-gaap_SegmentDomain_e23b9c26-93af-4c93-8e55-eaec720019c5_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_9b680ede-851f-4ecd-b09e-78458f166f35" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e23b9c26-93af-4c93-8e55-eaec720019c5" xlink:to="loc_us-gaap_SegmentDomain_9b680ede-851f-4ecd-b09e-78458f166f35" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CableCommunicationsSegmentsMember_4200a6f3-8e84-4c90-8dc8-9b552b5c60a5" xlink:href="cmcsa-20221231.xsd#cmcsa_CableCommunicationsSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9b680ede-851f-4ecd-b09e-78458f166f35" xlink:to="loc_cmcsa_CableCommunicationsSegmentsMember_4200a6f3-8e84-4c90-8dc8-9b552b5c60a5" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MediaSegmentsMember_4dc2f74f-4d25-44ff-878a-567df4eb9aa9" xlink:href="cmcsa-20221231.xsd#cmcsa_MediaSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9b680ede-851f-4ecd-b09e-78458f166f35" xlink:to="loc_cmcsa_MediaSegmentsMember_4dc2f74f-4d25-44ff-878a-567df4eb9aa9" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_StudiosSegmentsMember_b9c8b6b4-1667-44d7-aaec-e7013730fb70" xlink:href="cmcsa-20221231.xsd#cmcsa_StudiosSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9b680ede-851f-4ecd-b09e-78458f166f35" xlink:to="loc_cmcsa_StudiosSegmentsMember_b9c8b6b4-1667-44d7-aaec-e7013730fb70" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ThemeParksSegmentsMember_9a078cc9-e69f-4e6a-8ba4-0828482a72c5" xlink:href="cmcsa-20221231.xsd#cmcsa_ThemeParksSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9b680ede-851f-4ecd-b09e-78458f166f35" xlink:to="loc_cmcsa_ThemeParksSegmentsMember_9a078cc9-e69f-4e6a-8ba4-0828482a72c5" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_SkyLimitedSegmentsMember_d7c4faa4-b2d6-4230-b3ba-f47e933e87ef" xlink:href="cmcsa-20221231.xsd#cmcsa_SkyLimitedSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_9b680ede-851f-4ecd-b09e-78458f166f35" xlink:to="loc_cmcsa_SkyLimitedSegmentsMember_d7c4faa4-b2d6-4230-b3ba-f47e933e87ef" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_01042c03-0bcf-4a31-b7f1-3a2a567c034a" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b126b901-f41d-4e01-9def-0b87190adee0" xlink:to="loc_srt_ConsolidationItemsAxis_01042c03-0bcf-4a31-b7f1-3a2a567c034a" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_01042c03-0bcf-4a31-b7f1-3a2a567c034a_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_01042c03-0bcf-4a31-b7f1-3a2a567c034a" xlink:to="loc_srt_ConsolidationItemsDomain_01042c03-0bcf-4a31-b7f1-3a2a567c034a_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_5815928b-4c46-45eb-83e9-dc2f34ceb1d4" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_01042c03-0bcf-4a31-b7f1-3a2a567c034a" xlink:to="loc_srt_ConsolidationItemsDomain_5815928b-4c46-45eb-83e9-dc2f34ceb1d4" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MaterialReconcilingItemsMember_4fdfa945-1a8c-4a29-a3c4-fbec38edfe61" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MaterialReconcilingItemsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_5815928b-4c46-45eb-83e9-dc2f34ceb1d4" xlink:to="loc_us-gaap_MaterialReconcilingItemsMember_4fdfa945-1a8c-4a29-a3c4-fbec38edfe61" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_2d5e0967-429f-42da-bd31-98f7a227014d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntersegmentEliminationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaterialReconcilingItemsMember_4fdfa945-1a8c-4a29-a3c4-fbec38edfe61" xlink:to="loc_us-gaap_IntersegmentEliminationMember_2d5e0967-429f-42da-bd31-98f7a227014d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CorporateNonSegmentIntersegmentRevenueMember_db149db6-2c5f-4422-baa7-224f3e2e47be" xlink:href="cmcsa-20221231.xsd#cmcsa_CorporateNonSegmentIntersegmentRevenueMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MaterialReconcilingItemsMember_4fdfa945-1a8c-4a29-a3c4-fbec38edfe61" xlink:to="loc_cmcsa_CorporateNonSegmentIntersegmentRevenueMember_db149db6-2c5f-4422-baa7-224f3e2e47be" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitAxis_48a18dfd-4d67-4fbc-b9dc-cdce51ba3c24" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b126b901-f41d-4e01-9def-0b87190adee0" xlink:to="loc_cmcsa_BusinessUnitAxis_48a18dfd-4d67-4fbc-b9dc-cdce51ba3c24" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_48a18dfd-4d67-4fbc-b9dc-cdce51ba3c24_default" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_cmcsa_BusinessUnitAxis_48a18dfd-4d67-4fbc-b9dc-cdce51ba3c24" xlink:to="loc_cmcsa_BusinessUnitDomain_48a18dfd-4d67-4fbc-b9dc-cdce51ba3c24_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_61e54643-ae4f-4743-aa1d-22214f194353" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_cmcsa_BusinessUnitAxis_48a18dfd-4d67-4fbc-b9dc-cdce51ba3c24" xlink:to="loc_cmcsa_BusinessUnitDomain_61e54643-ae4f-4743-aa1d-22214f194353" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NBCUniversalBusinessUnitMember_de36cad4-304d-4da3-ae5a-b6a1a3fbf679" xlink:href="cmcsa-20221231.xsd#cmcsa_NBCUniversalBusinessUnitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_61e54643-ae4f-4743-aa1d-22214f194353" xlink:to="loc_cmcsa_NBCUniversalBusinessUnitMember_de36cad4-304d-4da3-ae5a-b6a1a3fbf679" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/SegmentInformationReconciliationofAdjustedEBITDAfromSegmenttoConsolidatedStatementsDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#SegmentInformationReconciliationofAdjustedEBITDAfromSegmenttoConsolidatedStatementsDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/SegmentInformationReconciliationofAdjustedEBITDAfromSegmenttoConsolidatedStatementsDetails" xlink:type="extended" id="id546ce849d6c4140bc98759e725c02de_SegmentInformationReconciliationofAdjustedEBITDAfromSegmenttoConsolidatedStatementsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_2861e0fb-9485-4d03-b305-ed214d79d173" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AdjustmentsForItemsExcludedFromAdjustedEBITDA_d602cd43-2a8a-4625-81df-d99a377e5908" xlink:href="cmcsa-20221231.xsd#cmcsa_AdjustmentsForItemsExcludedFromAdjustedEBITDA"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_2861e0fb-9485-4d03-b305-ed214d79d173" xlink:to="loc_cmcsa_AdjustmentsForItemsExcludedFromAdjustedEBITDA_d602cd43-2a8a-4625-81df-d99a377e5908" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5641640f-0cfb-49e4-bf15-c759032ecc82" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_2861e0fb-9485-4d03-b305-ed214d79d173" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5641640f-0cfb-49e4-bf15-c759032ecc82" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_e2a878eb-498f-404c-b58a-ec7d39845e3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_5641640f-0cfb-49e4-bf15-c759032ecc82" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_e2a878eb-498f-404c-b58a-ec7d39845e3b" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_e2a878eb-498f-404c-b58a-ec7d39845e3b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e2a878eb-498f-404c-b58a-ec7d39845e3b" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_e2a878eb-498f-404c-b58a-ec7d39845e3b_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_a92cb638-b5ef-447c-9cf9-4640f828a62e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementLocationDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_e2a878eb-498f-404c-b58a-ec7d39845e3b" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_a92cb638-b5ef-447c-9cf9-4640f828a62e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_GainLossRelatedToLegalSettlementMember_9a318e30-5aea-4ad6-bd62-0abf5b8d1f17" xlink:href="cmcsa-20221231.xsd#cmcsa_GainLossRelatedToLegalSettlementMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_a92cb638-b5ef-447c-9cf9-4640f828a62e" xlink:to="loc_cmcsa_GainLossRelatedToLegalSettlementMember_9a318e30-5aea-4ad6-bd62-0abf5b8d1f17" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#RevenueDisaggregationofRevenueDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/RevenueDisaggregationofRevenueDetails" xlink:type="extended" id="i16f5174fd5c34944afa147e8837ba577_RevenueDisaggregationofRevenueDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_957cc7c9-b294-4a26-8c32-2b9a24b299e4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_ff2bbabc-fc33-4255-b0d3-9a83f3b1a3be" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_957cc7c9-b294-4a26-8c32-2b9a24b299e4" xlink:to="loc_us-gaap_Revenues_ff2bbabc-fc33-4255-b0d3-9a83f3b1a3be" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_ce4772fd-1cea-4ecb-9b63-941d58a207ef" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_957cc7c9-b294-4a26-8c32-2b9a24b299e4" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_ce4772fd-1cea-4ecb-9b63-941d58a207ef" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_04ac7622-3c3c-49d3-a640-1f715df96ab3" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_ce4772fd-1cea-4ecb-9b63-941d58a207ef" xlink:to="loc_srt_ConsolidationItemsAxis_04ac7622-3c3c-49d3-a640-1f715df96ab3" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_04ac7622-3c3c-49d3-a640-1f715df96ab3_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_04ac7622-3c3c-49d3-a640-1f715df96ab3" xlink:to="loc_srt_ConsolidationItemsDomain_04ac7622-3c3c-49d3-a640-1f715df96ab3_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_4ba6ab50-c9d0-48d6-b469-8e88852094cc" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_04ac7622-3c3c-49d3-a640-1f715df96ab3" xlink:to="loc_srt_ConsolidationItemsDomain_4ba6ab50-c9d0-48d6-b469-8e88852094cc" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_6e07733e-fdb8-452b-817d-cc2f021eb869" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_4ba6ab50-c9d0-48d6-b469-8e88852094cc" xlink:to="loc_us-gaap_OperatingSegmentsMember_6e07733e-fdb8-452b-817d-cc2f021eb869" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntersegmentEliminationMember_7b36001a-2257-4198-b0f9-95f4deeb00c9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IntersegmentEliminationMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_4ba6ab50-c9d0-48d6-b469-8e88852094cc" xlink:to="loc_us-gaap_IntersegmentEliminationMember_7b36001a-2257-4198-b0f9-95f4deeb00c9" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_89797993-977d-4227-ab5c-d4c6b686333a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateNonSegmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_4ba6ab50-c9d0-48d6-b469-8e88852094cc" xlink:to="loc_us-gaap_CorporateNonSegmentMember_89797993-977d-4227-ab5c-d4c6b686333a" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_e656e4ab-5213-486b-922d-22a6c67c5458" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_ce4772fd-1cea-4ecb-9b63-941d58a207ef" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_e656e4ab-5213-486b-922d-22a6c67c5458" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_e656e4ab-5213-486b-922d-22a6c67c5458_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e656e4ab-5213-486b-922d-22a6c67c5458" xlink:to="loc_us-gaap_SegmentDomain_e656e4ab-5213-486b-922d-22a6c67c5458_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3ccfd417-f31d-4b59-bd7f-1dba1c2389e2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_e656e4ab-5213-486b-922d-22a6c67c5458" xlink:to="loc_us-gaap_SegmentDomain_3ccfd417-f31d-4b59-bd7f-1dba1c2389e2" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CableCommunicationsSegmentsMember_bfc72796-a2d2-46b0-997a-1c4d5ea202b8" xlink:href="cmcsa-20221231.xsd#cmcsa_CableCommunicationsSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3ccfd417-f31d-4b59-bd7f-1dba1c2389e2" xlink:to="loc_cmcsa_CableCommunicationsSegmentsMember_bfc72796-a2d2-46b0-997a-1c4d5ea202b8" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MediaSegmentsMember_12a89317-b869-4deb-aac9-9ebb96dec74b" xlink:href="cmcsa-20221231.xsd#cmcsa_MediaSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3ccfd417-f31d-4b59-bd7f-1dba1c2389e2" xlink:to="loc_cmcsa_MediaSegmentsMember_12a89317-b869-4deb-aac9-9ebb96dec74b" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_StudiosSegmentsMember_da72752c-7efc-4e42-bc40-a43316840df6" xlink:href="cmcsa-20221231.xsd#cmcsa_StudiosSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3ccfd417-f31d-4b59-bd7f-1dba1c2389e2" xlink:to="loc_cmcsa_StudiosSegmentsMember_da72752c-7efc-4e42-bc40-a43316840df6" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ThemeParksSegmentsMember_8375d7bd-845d-4560-941c-e8524a7f9c01" xlink:href="cmcsa-20221231.xsd#cmcsa_ThemeParksSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3ccfd417-f31d-4b59-bd7f-1dba1c2389e2" xlink:to="loc_cmcsa_ThemeParksSegmentsMember_8375d7bd-845d-4560-941c-e8524a7f9c01" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_SkyLimitedSegmentsMember_96977b5c-8d30-456f-badf-80b579f573d3" xlink:href="cmcsa-20221231.xsd#cmcsa_SkyLimitedSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_3ccfd417-f31d-4b59-bd7f-1dba1c2389e2" xlink:to="loc_cmcsa_SkyLimitedSegmentsMember_96977b5c-8d30-456f-badf-80b579f573d3" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_e907427e-33a4-4d35-92ed-092e54488f7c" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_ce4772fd-1cea-4ecb-9b63-941d58a207ef" xlink:to="loc_srt_ProductOrServiceAxis_e907427e-33a4-4d35-92ed-092e54488f7c" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e907427e-33a4-4d35-92ed-092e54488f7c_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_e907427e-33a4-4d35-92ed-092e54488f7c" xlink:to="loc_srt_ProductsAndServicesDomain_e907427e-33a4-4d35-92ed-092e54488f7c_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_e907427e-33a4-4d35-92ed-092e54488f7c" xlink:to="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ResidentialBroadbandMember_30bea930-ec7f-43ea-b71c-752507eebd51" xlink:href="cmcsa-20221231.xsd#cmcsa_ResidentialBroadbandMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_ResidentialBroadbandMember_30bea930-ec7f-43ea-b71c-752507eebd51" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ResidentialVideoMember_5f81d7dc-bd20-4c1e-9a52-15d11bda8a9f" xlink:href="cmcsa-20221231.xsd#cmcsa_ResidentialVideoMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_ResidentialVideoMember_5f81d7dc-bd20-4c1e-9a52-15d11bda8a9f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ResidentialVoiceMember_d4114898-c79e-4213-806b-4731e57d8845" xlink:href="cmcsa-20221231.xsd#cmcsa_ResidentialVoiceMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_ResidentialVoiceMember_d4114898-c79e-4213-806b-4731e57d8845" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ResidentialWirelessMember_fd01e123-14e4-47d3-83a3-fba169a981f5" xlink:href="cmcsa-20221231.xsd#cmcsa_ResidentialWirelessMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_ResidentialWirelessMember_fd01e123-14e4-47d3-83a3-fba169a981f5" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessServicesMember_7e0e8d82-517f-4508-bd9a-39029a61ae73" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_BusinessServicesMember_7e0e8d82-517f-4508-bd9a-39029a61ae73" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingMember_e3ce685c-b7c3-4bac-8d05-2a0f7cbc5ae0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdvertisingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_us-gaap_AdvertisingMember_e3ce685c-b7c3-4bac-8d05-2a0f7cbc5ae0" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_OtherMember_dc58ac36-2966-4d03-9f93-bdd5338fe730" xlink:href="cmcsa-20221231.xsd#cmcsa_OtherMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_OtherMember_dc58ac36-2966-4d03-9f93-bdd5338fe730" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DistributionMember_d1f4352a-3420-44a0-b833-94539457ab76" xlink:href="cmcsa-20221231.xsd#cmcsa_DistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_DistributionMember_d1f4352a-3420-44a0-b833-94539457ab76" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ContentLicensingMember_e965e9f1-8796-48f5-9ae1-bc97b68afd49" xlink:href="cmcsa-20221231.xsd#cmcsa_ContentLicensingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_ContentLicensingMember_e965e9f1-8796-48f5-9ae1-bc97b68afd49" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_TheatricalMember_3607eb94-4ce0-4c8c-a7c6-e8c6f77c664f" xlink:href="cmcsa-20221231.xsd#cmcsa_TheatricalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_TheatricalMember_3607eb94-4ce0-4c8c-a7c6-e8c6f77c664f" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_HomeEntertainmentAndOtherMember_30f8f9cc-620e-4120-93dd-5e345dd56fe1" xlink:href="cmcsa-20221231.xsd#cmcsa_HomeEntertainmentAndOtherMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_HomeEntertainmentAndOtherMember_30f8f9cc-620e-4120-93dd-5e345dd56fe1" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DirectToConsumerMember_543dde5e-f596-4aaf-aefd-9e5633849ee5" xlink:href="cmcsa-20221231.xsd#cmcsa_DirectToConsumerMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_DirectToConsumerMember_543dde5e-f596-4aaf-aefd-9e5633849ee5" xlink:type="arc" order="11"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ContentMember_95c38a0c-3c20-4be4-a36b-a43d0aa3a278" xlink:href="cmcsa-20221231.xsd#cmcsa_ContentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_588c2a78-d1e1-4403-8aab-256f4cc3705f" xlink:to="loc_cmcsa_ContentMember_95c38a0c-3c20-4be4-a36b-a43d0aa3a278" xlink:type="arc" order="12"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitAxis_ee323fdf-dd45-4898-ae4a-faa0cdb45984" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_ce4772fd-1cea-4ecb-9b63-941d58a207ef" xlink:to="loc_cmcsa_BusinessUnitAxis_ee323fdf-dd45-4898-ae4a-faa0cdb45984" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_ee323fdf-dd45-4898-ae4a-faa0cdb45984_default" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_cmcsa_BusinessUnitAxis_ee323fdf-dd45-4898-ae4a-faa0cdb45984" xlink:to="loc_cmcsa_BusinessUnitDomain_ee323fdf-dd45-4898-ae4a-faa0cdb45984_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_145f97a6-a7bb-4849-91f0-fe56a09ed585" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_cmcsa_BusinessUnitAxis_ee323fdf-dd45-4898-ae4a-faa0cdb45984" xlink:to="loc_cmcsa_BusinessUnitDomain_145f97a6-a7bb-4849-91f0-fe56a09ed585" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NBCUniversalBusinessUnitMember_99ec23ff-1be3-44b4-8a20-8a640e8ea21f" xlink:href="cmcsa-20221231.xsd#cmcsa_NBCUniversalBusinessUnitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_145f97a6-a7bb-4849-91f0-fe56a09ed585" xlink:to="loc_cmcsa_NBCUniversalBusinessUnitMember_99ec23ff-1be3-44b4-8a20-8a640e8ea21f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_InterBusinessUnitEliminationsMember_c32f5318-74fb-42fd-be96-ff4aab5dfac9" xlink:href="cmcsa-20221231.xsd#cmcsa_InterBusinessUnitEliminationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_145f97a6-a7bb-4849-91f0-fe56a09ed585" xlink:to="loc_cmcsa_InterBusinessUnitEliminationsMember_c32f5318-74fb-42fd-be96-ff4aab5dfac9" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/RevenueRevenuebyGeographicLocationDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#RevenueRevenuebyGeographicLocationDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/RevenueRevenuebyGeographicLocationDetails" xlink:type="extended" id="i4202cc438283487985290ad15e9902aa_RevenueRevenuebyGeographicLocationDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_13b74499-6fd8-443c-a71a-67639a22a443" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_0f29b008-393b-4443-bb2f-34ba68957ac3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Revenues"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_13b74499-6fd8-443c-a71a-67639a22a443" xlink:to="loc_us-gaap_Revenues_0f29b008-393b-4443-bb2f-34ba68957ac3" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_21409334-d77b-4f00-9c78-bdaf2177ae20" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_13b74499-6fd8-443c-a71a-67639a22a443" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_21409334-d77b-4f00-9c78-bdaf2177ae20" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_14cb7a35-56d4-41a7-9392-5f74b9f77408" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_21409334-d77b-4f00-9c78-bdaf2177ae20" xlink:to="loc_srt_StatementGeographicalAxis_14cb7a35-56d4-41a7-9392-5f74b9f77408" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_14cb7a35-56d4-41a7-9392-5f74b9f77408_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_14cb7a35-56d4-41a7-9392-5f74b9f77408" xlink:to="loc_srt_SegmentGeographicalDomain_14cb7a35-56d4-41a7-9392-5f74b9f77408_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_5a0ba695-69ab-4a3f-a501-06d32b380b46" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_14cb7a35-56d4-41a7-9392-5f74b9f77408" xlink:to="loc_srt_SegmentGeographicalDomain_5a0ba695-69ab-4a3f-a501-06d32b380b46" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_country_US_6176448f-6191-4768-b9b6-8e60456cf401" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_5a0ba695-69ab-4a3f-a501-06d32b380b46" xlink:to="loc_country_US_6176448f-6191-4768-b9b6-8e60456cf401" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_country_GB_6c8c4609-5b09-4ec1-958f-57c90ea88fa8" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_GB"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_5a0ba695-69ab-4a3f-a501-06d32b380b46" xlink:to="loc_country_GB_6c8c4609-5b09-4ec1-958f-57c90ea88fa8" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_OtherGeographicLocationsMember_bc980123-a178-4834-8586-dd2076ea9447" xlink:href="cmcsa-20221231.xsd#cmcsa_OtherGeographicLocationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_5a0ba695-69ab-4a3f-a501-06d32b380b46" xlink:to="loc_cmcsa_OtherGeographicLocationsMember_bc980123-a178-4834-8586-dd2076ea9447" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/RevenueNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#RevenueNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/RevenueNarrativeDetails" xlink:type="extended" id="ic94d6ff5fa594f13a27224dd91e529a8_RevenueNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_RevenuePerformanceObligationDescriptionOfTimingTermOfContract_49740b7b-0444-48fa-9849-a0dbcb09b031" xlink:href="cmcsa-20221231.xsd#cmcsa_RevenuePerformanceObligationDescriptionOfTimingTermOfContract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_cmcsa_RevenuePerformanceObligationDescriptionOfTimingTermOfContract_49740b7b-0444-48fa-9849-a0dbcb09b031" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_RevenuePerformanceObligationDescriptionOfTimingEquipmentInstallmentPlanPaymentTerm_9f2cf01f-879b-4070-b04a-6a8ad3db79cf" xlink:href="cmcsa-20221231.xsd#cmcsa_RevenuePerformanceObligationDescriptionOfTimingEquipmentInstallmentPlanPaymentTerm"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_cmcsa_RevenuePerformanceObligationDescriptionOfTimingEquipmentInstallmentPlanPaymentTerm_9f2cf01f-879b-4070-b04a-6a8ad3db79cf" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_698bc446-f36d-4fb1-afcb-655fc4640685" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_698bc446-f36d-4fb1-afcb-655fc4640685" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod_56d96ee7-9b60-49bc-a71d-3f3d8f8b48aa" xlink:href="cmcsa-20221231.xsd#cmcsa_RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_cmcsa_RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod_56d96ee7-9b60-49bc-a71d-3f3d8f8b48aa" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BacklogAsAPercentOfAnnualRevenuePercent_95ba3952-ee9a-440f-9868-e9c07d8a8e08" xlink:href="cmcsa-20221231.xsd#cmcsa_BacklogAsAPercentOfAnnualRevenuePercent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_cmcsa_BacklogAsAPercentOfAnnualRevenuePercent_95ba3952-ee9a-440f-9868-e9c07d8a8e08" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3" xlink:to="loc_us-gaap_SegmentDomain_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3" xlink:to="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CableCommunicationsSegmentsMember_1f12240e-b514-49cb-ad31-0c01bbc22c8d" xlink:href="cmcsa-20221231.xsd#cmcsa_CableCommunicationsSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:to="loc_cmcsa_CableCommunicationsSegmentsMember_1f12240e-b514-49cb-ad31-0c01bbc22c8d" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MediaSegmentsMember_ca60ea03-934f-473c-973b-9e90e48c3f44" xlink:href="cmcsa-20221231.xsd#cmcsa_MediaSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:to="loc_cmcsa_MediaSegmentsMember_ca60ea03-934f-473c-973b-9e90e48c3f44" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_SkyLimitedSegmentsMember_e1a0fe5b-6985-4a66-bb69-9912ff34b668" xlink:href="cmcsa-20221231.xsd#cmcsa_SkyLimitedSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:to="loc_cmcsa_SkyLimitedSegmentsMember_e1a0fe5b-6985-4a66-bb69-9912ff34b668" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_bf4ee802-5d3b-4856-b87c-b1db643c33f5" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:to="loc_srt_ProductOrServiceAxis_bf4ee802-5d3b-4856-b87c-b1db643c33f5" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_bf4ee802-5d3b-4856-b87c-b1db643c33f5_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_bf4ee802-5d3b-4856-b87c-b1db643c33f5" xlink:to="loc_srt_ProductsAndServicesDomain_bf4ee802-5d3b-4856-b87c-b1db643c33f5_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_bf4ee802-5d3b-4856-b87c-b1db643c33f5" xlink:to="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ResidentialMember_5872ab33-6044-4bbf-bb46-1ca71c9e13b3" xlink:href="cmcsa-20221231.xsd#cmcsa_ResidentialMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_ResidentialMember_5872ab33-6044-4bbf-bb46-1ca71c9e13b3" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessServicesMember_eea9dd7e-7540-4a22-9300-887fd098054e" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_BusinessServicesMember_eea9dd7e-7540-4a22-9300-887fd098054e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingMember_eccda683-9a53-4534-95ca-96178900be56" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdvertisingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_us-gaap_AdvertisingMember_eccda683-9a53-4534-95ca-96178900be56" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DistributionMember_4f619a27-e41d-4c06-83db-018503ffa7f7" xlink:href="cmcsa-20221231.xsd#cmcsa_DistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_DistributionMember_4f619a27-e41d-4c06-83db-018503ffa7f7" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_TheatricalMember_e631c4f3-58e0-445c-82dd-d2dc2f832dfa" xlink:href="cmcsa-20221231.xsd#cmcsa_TheatricalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_TheatricalMember_e631c4f3-58e0-445c-82dd-d2dc2f832dfa" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ContentLicensingMember_cd142538-a126-4c26-ac9b-aa6eb6d1d142" xlink:href="cmcsa-20221231.xsd#cmcsa_ContentLicensingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_ContentLicensingMember_cd142538-a126-4c26-ac9b-aa6eb6d1d142" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_HomeEntertainmentMember_aae35502-4778-4289-b0e1-ddad1a19a0a9" xlink:href="cmcsa-20221231.xsd#cmcsa_HomeEntertainmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_HomeEntertainmentMember_aae35502-4778-4289-b0e1-ddad1a19a0a9" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DirectToConsumerMember_3c76a734-ec53-44f8-87bf-88b532cbc196" xlink:href="cmcsa-20221231.xsd#cmcsa_DirectToConsumerMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_DirectToConsumerMember_3c76a734-ec53-44f8-87bf-88b532cbc196" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_b0449e2c-e661-427c-b368-6b460f4dd4fa" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:to="loc_srt_RangeAxis_b0449e2c-e661-427c-b368-6b460f4dd4fa" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_b0449e2c-e661-427c-b368-6b460f4dd4fa_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_b0449e2c-e661-427c-b368-6b460f4dd4fa" xlink:to="loc_srt_RangeMember_b0449e2c-e661-427c-b368-6b460f4dd4fa_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2bcbe1f5-661e-4efd-ad71-5a9bc6b3b9ed" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_b0449e2c-e661-427c-b368-6b460f4dd4fa" xlink:to="loc_srt_RangeMember_2bcbe1f5-661e-4efd-ad71-5a9bc6b3b9ed" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_b123ae41-d493-47ec-90a6-cff34c9aba2f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2bcbe1f5-661e-4efd-ad71-5a9bc6b3b9ed" xlink:to="loc_srt_MinimumMember_b123ae41-d493-47ec-90a6-cff34c9aba2f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d9725f5f-8474-4f46-bf99-612883d4200f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2bcbe1f5-661e-4efd-ad71-5a9bc6b3b9ed" xlink:to="loc_srt_MaximumMember_d9725f5f-8474-4f46-bf99-612883d4200f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_a7c70c31-70c3-4514-b187-554147c3f38b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_a7c70c31-70c3-4514-b187-554147c3f38b" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitAxis_5f3f4c21-ca7c-409a-b311-4170abaebe50" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:to="loc_cmcsa_BusinessUnitAxis_5f3f4c21-ca7c-409a-b311-4170abaebe50" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_5f3f4c21-ca7c-409a-b311-4170abaebe50_default" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_cmcsa_BusinessUnitAxis_5f3f4c21-ca7c-409a-b311-4170abaebe50" xlink:to="loc_cmcsa_BusinessUnitDomain_5f3f4c21-ca7c-409a-b311-4170abaebe50_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_13400b8d-ef6c-4603-8cbb-ed08be6a087c" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_cmcsa_BusinessUnitAxis_5f3f4c21-ca7c-409a-b311-4170abaebe50" xlink:to="loc_cmcsa_BusinessUnitDomain_13400b8d-ef6c-4603-8cbb-ed08be6a087c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NBCUniversalBusinessUnitMember_0feb15f7-21a0-404a-861a-04ea117ac628" xlink:href="cmcsa-20221231.xsd#cmcsa_NBCUniversalBusinessUnitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_13400b8d-ef6c-4603-8cbb-ed08be6a087c" xlink:to="loc_cmcsa_NBCUniversalBusinessUnitMember_0feb15f7-21a0-404a-861a-04ea117ac628" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/RevenueNarrativeDetails_1" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#RevenueNarrativeDetails_1"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/RevenueNarrativeDetails_1" xlink:type="extended" id="icb310fc29c4b4d94b0628fb2c3535d3d_RevenueNarrativeDetails_1"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_RevenuePerformanceObligationDescriptionOfTimingTermOfContract_49740b7b-0444-48fa-9849-a0dbcb09b031" xlink:href="cmcsa-20221231.xsd#cmcsa_RevenuePerformanceObligationDescriptionOfTimingTermOfContract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_cmcsa_RevenuePerformanceObligationDescriptionOfTimingTermOfContract_49740b7b-0444-48fa-9849-a0dbcb09b031" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_RevenuePerformanceObligationDescriptionOfTimingEquipmentInstallmentPlanPaymentTerm_9f2cf01f-879b-4070-b04a-6a8ad3db79cf" xlink:href="cmcsa-20221231.xsd#cmcsa_RevenuePerformanceObligationDescriptionOfTimingEquipmentInstallmentPlanPaymentTerm"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_cmcsa_RevenuePerformanceObligationDescriptionOfTimingEquipmentInstallmentPlanPaymentTerm_9f2cf01f-879b-4070-b04a-6a8ad3db79cf" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_698bc446-f36d-4fb1-afcb-655fc4640685" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_698bc446-f36d-4fb1-afcb-655fc4640685" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod_56d96ee7-9b60-49bc-a71d-3f3d8f8b48aa" xlink:href="cmcsa-20221231.xsd#cmcsa_RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_cmcsa_RevenuePerformanceObligationDescriptionOfPaymentTermsPeriod_56d96ee7-9b60-49bc-a71d-3f3d8f8b48aa" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BacklogAsAPercentOfAnnualRevenuePercent_95ba3952-ee9a-440f-9868-e9c07d8a8e08" xlink:href="cmcsa-20221231.xsd#cmcsa_BacklogAsAPercentOfAnnualRevenuePercent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_cmcsa_BacklogAsAPercentOfAnnualRevenuePercent_95ba3952-ee9a-440f-9868-e9c07d8a8e08" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_7601b5de-0230-4366-ad8e-4c1fe3414a54" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3" xlink:to="loc_us-gaap_SegmentDomain_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3ce58f00-4ceb-4577-99dd-94b1b3f6e8c3" xlink:to="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CableCommunicationsSegmentsMember_1f12240e-b514-49cb-ad31-0c01bbc22c8d" xlink:href="cmcsa-20221231.xsd#cmcsa_CableCommunicationsSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:to="loc_cmcsa_CableCommunicationsSegmentsMember_1f12240e-b514-49cb-ad31-0c01bbc22c8d" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MediaSegmentsMember_ca60ea03-934f-473c-973b-9e90e48c3f44" xlink:href="cmcsa-20221231.xsd#cmcsa_MediaSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:to="loc_cmcsa_MediaSegmentsMember_ca60ea03-934f-473c-973b-9e90e48c3f44" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_SkyLimitedSegmentsMember_e1a0fe5b-6985-4a66-bb69-9912ff34b668" xlink:href="cmcsa-20221231.xsd#cmcsa_SkyLimitedSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_97e524b3-68cc-46cf-8ac9-d1e25c734c4d" xlink:to="loc_cmcsa_SkyLimitedSegmentsMember_e1a0fe5b-6985-4a66-bb69-9912ff34b668" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_bf4ee802-5d3b-4856-b87c-b1db643c33f5" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductOrServiceAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:to="loc_srt_ProductOrServiceAxis_bf4ee802-5d3b-4856-b87c-b1db643c33f5" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_bf4ee802-5d3b-4856-b87c-b1db643c33f5_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_bf4ee802-5d3b-4856-b87c-b1db643c33f5" xlink:to="loc_srt_ProductsAndServicesDomain_bf4ee802-5d3b-4856-b87c-b1db643c33f5_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ProductsAndServicesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_bf4ee802-5d3b-4856-b87c-b1db643c33f5" xlink:to="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ResidentialMember_5872ab33-6044-4bbf-bb46-1ca71c9e13b3" xlink:href="cmcsa-20221231.xsd#cmcsa_ResidentialMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_ResidentialMember_5872ab33-6044-4bbf-bb46-1ca71c9e13b3" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessServicesMember_eea9dd7e-7540-4a22-9300-887fd098054e" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessServicesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_BusinessServicesMember_eea9dd7e-7540-4a22-9300-887fd098054e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdvertisingMember_eccda683-9a53-4534-95ca-96178900be56" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdvertisingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_us-gaap_AdvertisingMember_eccda683-9a53-4534-95ca-96178900be56" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DistributionMember_4f619a27-e41d-4c06-83db-018503ffa7f7" xlink:href="cmcsa-20221231.xsd#cmcsa_DistributionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_DistributionMember_4f619a27-e41d-4c06-83db-018503ffa7f7" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_TheatricalMember_e631c4f3-58e0-445c-82dd-d2dc2f832dfa" xlink:href="cmcsa-20221231.xsd#cmcsa_TheatricalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_TheatricalMember_e631c4f3-58e0-445c-82dd-d2dc2f832dfa" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ContentLicensingMember_cd142538-a126-4c26-ac9b-aa6eb6d1d142" xlink:href="cmcsa-20221231.xsd#cmcsa_ContentLicensingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_ContentLicensingMember_cd142538-a126-4c26-ac9b-aa6eb6d1d142" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_HomeEntertainmentMember_aae35502-4778-4289-b0e1-ddad1a19a0a9" xlink:href="cmcsa-20221231.xsd#cmcsa_HomeEntertainmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_HomeEntertainmentMember_aae35502-4778-4289-b0e1-ddad1a19a0a9" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DirectToConsumerMember_3c76a734-ec53-44f8-87bf-88b532cbc196" xlink:href="cmcsa-20221231.xsd#cmcsa_DirectToConsumerMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5d3008b8-5047-4d04-9c7e-f51059feea74" xlink:to="loc_cmcsa_DirectToConsumerMember_3c76a734-ec53-44f8-87bf-88b532cbc196" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_b0449e2c-e661-427c-b368-6b460f4dd4fa" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:to="loc_srt_RangeAxis_b0449e2c-e661-427c-b368-6b460f4dd4fa" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_b0449e2c-e661-427c-b368-6b460f4dd4fa_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_b0449e2c-e661-427c-b368-6b460f4dd4fa" xlink:to="loc_srt_RangeMember_b0449e2c-e661-427c-b368-6b460f4dd4fa_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_2bcbe1f5-661e-4efd-ad71-5a9bc6b3b9ed" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_b0449e2c-e661-427c-b368-6b460f4dd4fa" xlink:to="loc_srt_RangeMember_2bcbe1f5-661e-4efd-ad71-5a9bc6b3b9ed" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_b123ae41-d493-47ec-90a6-cff34c9aba2f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2bcbe1f5-661e-4efd-ad71-5a9bc6b3b9ed" xlink:to="loc_srt_MinimumMember_b123ae41-d493-47ec-90a6-cff34c9aba2f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d9725f5f-8474-4f46-bf99-612883d4200f" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_2bcbe1f5-661e-4efd-ad71-5a9bc6b3b9ed" xlink:to="loc_srt_MaximumMember_d9725f5f-8474-4f46-bf99-612883d4200f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitAxis_5f3f4c21-ca7c-409a-b311-4170abaebe50" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_0c29a2dc-4275-405b-bf09-f1c73c91798b" xlink:to="loc_cmcsa_BusinessUnitAxis_5f3f4c21-ca7c-409a-b311-4170abaebe50" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_5f3f4c21-ca7c-409a-b311-4170abaebe50_default" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_cmcsa_BusinessUnitAxis_5f3f4c21-ca7c-409a-b311-4170abaebe50" xlink:to="loc_cmcsa_BusinessUnitDomain_5f3f4c21-ca7c-409a-b311-4170abaebe50_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BusinessUnitDomain_13400b8d-ef6c-4603-8cbb-ed08be6a087c" xlink:href="cmcsa-20221231.xsd#cmcsa_BusinessUnitDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_cmcsa_BusinessUnitAxis_5f3f4c21-ca7c-409a-b311-4170abaebe50" xlink:to="loc_cmcsa_BusinessUnitDomain_13400b8d-ef6c-4603-8cbb-ed08be6a087c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NBCUniversalBusinessUnitMember_0feb15f7-21a0-404a-861a-04ea117ac628" xlink:href="cmcsa-20221231.xsd#cmcsa_NBCUniversalBusinessUnitMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_BusinessUnitDomain_13400b8d-ef6c-4603-8cbb-ed08be6a087c" xlink:to="loc_cmcsa_NBCUniversalBusinessUnitMember_0feb15f7-21a0-404a-861a-04ea117ac628" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/RevenueChangesintheAllowanceforDoubtfulAccountsDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#RevenueChangesintheAllowanceforDoubtfulAccountsDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/RevenueChangesintheAllowanceforDoubtfulAccountsDetails" xlink:type="extended" id="i266a118a86714aec93667e957f242af5_RevenueChangesintheAllowanceforDoubtfulAccountsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_3733eb48-76c7-4e32-b481-3b50a48a340a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AccountsReceivableAllowanceForCreditLossWriteOffsNetOfRecoveriesAndOther_0f75512b-e6c9-4e0d-b30f-d332ba36962c" xlink:href="cmcsa-20221231.xsd#cmcsa_AccountsReceivableAllowanceForCreditLossWriteOffsNetOfRecoveriesAndOther"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3733eb48-76c7-4e32-b481-3b50a48a340a" xlink:to="loc_cmcsa_AccountsReceivableAllowanceForCreditLossWriteOffsNetOfRecoveriesAndOther_0f75512b-e6c9-4e0d-b30f-d332ba36962c" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_bb43bdb8-1892-41af-b569-9e46e242d4d4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DisaggregationOfRevenueTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_3733eb48-76c7-4e32-b481-3b50a48a340a" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_bb43bdb8-1892-41af-b569-9e46e242d4d4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_382b34db-602c-45e9-8d6b-2da4f78c7f21" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_bb43bdb8-1892-41af-b569-9e46e242d4d4" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_382b34db-602c-45e9-8d6b-2da4f78c7f21" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_382b34db-602c-45e9-8d6b-2da4f78c7f21_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_382b34db-602c-45e9-8d6b-2da4f78c7f21" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_382b34db-602c-45e9-8d6b-2da4f78c7f21_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_8c230815-b133-4445-9409-50795c2a2035" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_382b34db-602c-45e9-8d6b-2da4f78c7f21" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_8c230815-b133-4445-9409-50795c2a2035" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_5746c4c8-4626-4330-a8e6-a241ce85f1b7" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_8c230815-b133-4445-9409-50795c2a2035" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_5746c4c8-4626-4330-a8e6-a241ce85f1b7" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_472ccda9-0cd2-4d3f-815f-630e541489ab" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AdjustmentsForNewAccountingPronouncementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_bb43bdb8-1892-41af-b569-9e46e242d4d4" xlink:to="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_472ccda9-0cd2-4d3f-815f-630e541489ab" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_472ccda9-0cd2-4d3f-815f-630e541489ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TypeOfAdoptionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_472ccda9-0cd2-4d3f-815f-630e541489ab" xlink:to="loc_us-gaap_TypeOfAdoptionMember_472ccda9-0cd2-4d3f-815f-630e541489ab_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TypeOfAdoptionMember_f45bce2d-6ef5-4b7b-bdfe-38eaf5cda41e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TypeOfAdoptionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AdjustmentsForNewAccountingPronouncementsAxis_472ccda9-0cd2-4d3f-815f-630e541489ab" xlink:to="loc_us-gaap_TypeOfAdoptionMember_f45bce2d-6ef5-4b7b-bdfe-38eaf5cda41e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountingStandardsUpdate201613Member_c0061f4e-667c-4aa9-b8a1-d34a29650614" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountingStandardsUpdate201613Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TypeOfAdoptionMember_f45bce2d-6ef5-4b7b-bdfe-38eaf5cda41e" xlink:to="loc_us-gaap_AccountingStandardsUpdate201613Member_c0061f4e-667c-4aa9-b8a1-d34a29650614" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/RevenueReceivablesNotYetBilledDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#RevenueReceivablesNotYetBilledDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/RevenueReceivablesNotYetBilledDetails" xlink:type="extended" id="i6594149ff44244af846e0e775127e12e_RevenueReceivablesNotYetBilledDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_38eb4b63-eda0-41cb-8c4b-e7a6d237f88b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_db33d03d-6845-46ae-8ece-90ec8ad78f80" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableNetCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_38eb4b63-eda0-41cb-8c4b-e7a6d237f88b" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_db33d03d-6845-46ae-8ece-90ec8ad78f80" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetNoncurrent_25b1c1ab-acd3-4b77-afb8-9bf48d58ab2c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableNetNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_38eb4b63-eda0-41cb-8c4b-e7a6d237f88b" xlink:to="loc_us-gaap_AccountsReceivableNetNoncurrent_25b1c1ab-acd3-4b77-afb8-9bf48d58ab2c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_b06e3ecf-09f1-456e-9b64-ddb7d425ae1c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsReceivableNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_38eb4b63-eda0-41cb-8c4b-e7a6d237f88b" xlink:to="loc_us-gaap_AccountsReceivableNet_b06e3ecf-09f1-456e-9b64-ddb7d425ae1c" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_dc0e4727-eae8-4fc6-b36b-916256332bf4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccountsNotesAndLoansReceivableLineItems_38eb4b63-eda0-41cb-8c4b-e7a6d237f88b" xlink:to="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_dc0e4727-eae8-4fc6-b36b-916256332bf4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_f430998c-9a87-4b4e-a881-cfc1e3179dc3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_dc0e4727-eae8-4fc6-b36b-916256332bf4" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_f430998c-9a87-4b4e-a881-cfc1e3179dc3" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_f430998c-9a87-4b4e-a881-cfc1e3179dc3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReceivablesBillingStatusDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_f430998c-9a87-4b4e-a881-cfc1e3179dc3" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_f430998c-9a87-4b4e-a881-cfc1e3179dc3_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivablesBillingStatusDomain_11f0f3aa-3bb3-4af1-925e-68b1cebf5312" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReceivablesBillingStatusDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivablesByBillingStatusTypeAxis_f430998c-9a87-4b4e-a881-cfc1e3179dc3" xlink:to="loc_us-gaap_ReceivablesBillingStatusDomain_11f0f3aa-3bb3-4af1-925e-68b1cebf5312" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnbilledRevenuesMember_b467c28e-767e-46c0-9159-3473b9324913" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnbilledRevenuesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivablesBillingStatusDomain_11f0f3aa-3bb3-4af1-925e-68b1cebf5312" xlink:to="loc_us-gaap_UnbilledRevenuesMember_b467c28e-767e-46c0-9159-3473b9324913" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_4a7bd749-06ed-499d-b3ae-6bd3e4851696" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_dc0e4727-eae8-4fc6-b36b-916256332bf4" xlink:to="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_4a7bd749-06ed-499d-b3ae-6bd3e4851696" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_4a7bd749-06ed-499d-b3ae-6bd3e4851696_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReceivableTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_4a7bd749-06ed-499d-b3ae-6bd3e4851696" xlink:to="loc_us-gaap_ReceivableTypeDomain_4a7bd749-06ed-499d-b3ae-6bd3e4851696_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReceivableTypeDomain_db50ff18-9002-4e38-a105-49ff5d982785" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ReceivableTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis_4a7bd749-06ed-499d-b3ae-6bd3e4851696" xlink:to="loc_us-gaap_ReceivableTypeDomain_db50ff18-9002-4e38-a105-49ff5d982785" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NotesReceivableMember_b4567e3f-57ef-44b9-90d8-f7a2306829e2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NotesReceivableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReceivableTypeDomain_db50ff18-9002-4e38-a105-49ff5d982785" xlink:to="loc_us-gaap_NotesReceivableMember_b4567e3f-57ef-44b9-90d8-f7a2306829e2" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_FinanceReceivableProgramAxis_358d1535-8a67-43e9-9843-40940e68424a" xlink:href="cmcsa-20221231.xsd#cmcsa_FinanceReceivableProgramAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_dc0e4727-eae8-4fc6-b36b-916256332bf4" xlink:to="loc_cmcsa_FinanceReceivableProgramAxis_358d1535-8a67-43e9-9843-40940e68424a" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_FinanceReceivableProgramDomain_358d1535-8a67-43e9-9843-40940e68424a_default" xlink:href="cmcsa-20221231.xsd#cmcsa_FinanceReceivableProgramDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_cmcsa_FinanceReceivableProgramAxis_358d1535-8a67-43e9-9843-40940e68424a" xlink:to="loc_cmcsa_FinanceReceivableProgramDomain_358d1535-8a67-43e9-9843-40940e68424a_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_FinanceReceivableProgramDomain_1af68926-8716-4a41-acf7-d6e695bc70bc" xlink:href="cmcsa-20221231.xsd#cmcsa_FinanceReceivableProgramDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_cmcsa_FinanceReceivableProgramAxis_358d1535-8a67-43e9-9843-40940e68424a" xlink:to="loc_cmcsa_FinanceReceivableProgramDomain_1af68926-8716-4a41-acf7-d6e695bc70bc" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquipmentInstallmentPlanMember_320dced6-f868-4802-8090-2a6d74ca15a1" xlink:href="cmcsa-20221231.xsd#cmcsa_EquipmentInstallmentPlanMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_FinanceReceivableProgramDomain_1af68926-8716-4a41-acf7-d6e695bc70bc" xlink:to="loc_cmcsa_EquipmentInstallmentPlanMember_320dced6-f868-4802-8090-2a6d74ca15a1" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/ProgrammingandProductionCostsNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#ProgrammingandProductionCostsNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/ProgrammingandProductionCostsNarrativeDetails" xlink:type="extended" id="i8ae15aa171b644aa8fcedf0c6990822c_ProgrammingandProductionCostsNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceNoncurrentStatementOfFinancialPositionExtensibleEnumeration_3264780d-7003-441a-b614-b748d61d6f2d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceNoncurrentStatementOfFinancialPositionExtensibleEnumeration"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:to="loc_us-gaap_GovernmentAssistanceNoncurrentStatementOfFinancialPositionExtensibleEnumeration_3264780d-7003-441a-b614-b748d61d6f2d" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceAmountCumulativeNoncurrent_aec1bd59-f15d-47ab-8e7b-ce4f30c867c0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceAmountCumulativeNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:to="loc_us-gaap_GovernmentAssistanceAmountCumulativeNoncurrent_aec1bd59-f15d-47ab-8e7b-ce4f30c867c0" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_8f77b155-2e2e-4a09-b00f-839569e02f40" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:to="loc_us-gaap_GovernmentAssistanceStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_8f77b155-2e2e-4a09-b00f-839569e02f40" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceAmount_91d38275-15c3-4104-bb05-bea0c5cf7f14" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:to="loc_us-gaap_GovernmentAssistanceAmount_91d38275-15c3-4104-bb05-bea0c5cf7f14" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceAmountCumulative_8bf70e53-1567-454f-ae89-2ce3f1336eb5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceAmountCumulative"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:to="loc_us-gaap_GovernmentAssistanceAmountCumulative_8bf70e53-1567-454f-ae89-2ce3f1336eb5" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceStatementOfFinancialPositionExtensibleEnumeration_ae749076-d900-4e66-affd-c56ea01eff79" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceStatementOfFinancialPositionExtensibleEnumeration"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:to="loc_us-gaap_GovernmentAssistanceStatementOfFinancialPositionExtensibleEnumeration_ae749076-d900-4e66-affd-c56ea01eff79" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_LicenseAgreementCommitmentsSportsRightsUnrecordedFutureMinimumAmount_d681cb55-b3e1-41b2-905e-3b6a837973b0" xlink:href="cmcsa-20221231.xsd#cmcsa_LicenseAgreementCommitmentsSportsRightsUnrecordedFutureMinimumAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:to="loc_cmcsa_LicenseAgreementCommitmentsSportsRightsUnrecordedFutureMinimumAmount_d681cb55-b3e1-41b2-905e-3b6a837973b0" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EntertainmentLicenseAgreementForProgramMaterialsUnrecordedFutureMinimumAmount_1afee2be-1579-42d7-af1f-e4073881c00e" xlink:href="cmcsa-20221231.xsd#cmcsa_EntertainmentLicenseAgreementForProgramMaterialsUnrecordedFutureMinimumAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:to="loc_cmcsa_EntertainmentLicenseAgreementForProgramMaterialsUnrecordedFutureMinimumAmount_1afee2be-1579-42d7-af1f-e4073881c00e" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTable_3cc5e9d4-7d1e-4777-ac70-77e363200bca" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GovernmentAssistanceLineItems_77a93efc-4e29-4b4f-aaa3-5cec27e19211" xlink:to="loc_us-gaap_GovernmentAssistanceTable_3cc5e9d4-7d1e-4777-ac70-77e363200bca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeAxis_156aee95-1eba-4de6-ad37-ca6b3af9bdc1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_GovernmentAssistanceTable_3cc5e9d4-7d1e-4777-ac70-77e363200bca" xlink:to="loc_us-gaap_GovernmentAssistanceTypeAxis_156aee95-1eba-4de6-ad37-ca6b3af9bdc1" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeDomain_156aee95-1eba-4de6-ad37-ca6b3af9bdc1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_GovernmentAssistanceTypeAxis_156aee95-1eba-4de6-ad37-ca6b3af9bdc1" xlink:to="loc_us-gaap_GovernmentAssistanceTypeDomain_156aee95-1eba-4de6-ad37-ca6b3af9bdc1_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GovernmentAssistanceTypeDomain_08619f13-c42d-425f-a0df-30f63a23a17f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GovernmentAssistanceTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_GovernmentAssistanceTypeAxis_156aee95-1eba-4de6-ad37-ca6b3af9bdc1" xlink:to="loc_us-gaap_GovernmentAssistanceTypeDomain_08619f13-c42d-425f-a0df-30f63a23a17f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ProductionTaxIncentivesFilmAndTelevisionOffsetMember_c4e71963-8668-4f42-b664-5d5ab47e63f6" xlink:href="cmcsa-20221231.xsd#cmcsa_ProductionTaxIncentivesFilmAndTelevisionOffsetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_08619f13-c42d-425f-a0df-30f63a23a17f" xlink:to="loc_cmcsa_ProductionTaxIncentivesFilmAndTelevisionOffsetMember_c4e71963-8668-4f42-b664-5d5ab47e63f6" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ProductionTaxIncentivesProgrammingAndProductionCostsOffsetMember_62fcc0a6-df38-4a9b-a4f1-38f527721c88" xlink:href="cmcsa-20221231.xsd#cmcsa_ProductionTaxIncentivesProgrammingAndProductionCostsOffsetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_08619f13-c42d-425f-a0df-30f63a23a17f" xlink:to="loc_cmcsa_ProductionTaxIncentivesProgrammingAndProductionCostsOffsetMember_62fcc0a6-df38-4a9b-a4f1-38f527721c88" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ProductionTaxIncentivesReceivableMember_77d4df21-464a-4fc6-831d-f73df84febad" xlink:href="cmcsa-20221231.xsd#cmcsa_ProductionTaxIncentivesReceivableMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GovernmentAssistanceTypeDomain_08619f13-c42d-425f-a0df-30f63a23a17f" xlink:to="loc_cmcsa_ProductionTaxIncentivesReceivableMember_77d4df21-464a-4fc6-831d-f73df84febad" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/IncomeTaxesNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#IncomeTaxesNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended" id="i9027331536c94dbb9f165f6c5b726dbf_IncomeTaxesNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_IncomeTaxesLineItems_4028c4d5-ad77-4f1a-987c-bafb176680d3" xlink:href="cmcsa-20221231.xsd#cmcsa_IncomeTaxesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ChangesInNetDeferredTaxLiabilityRelatedToOtherComprehensiveIncome_c7e19ab1-0299-4475-bbb2-4ea26bbfc184" xlink:href="cmcsa-20221231.xsd#cmcsa_ChangesInNetDeferredTaxLiabilityRelatedToOtherComprehensiveIncome"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_IncomeTaxesLineItems_4028c4d5-ad77-4f1a-987c-bafb176680d3" xlink:to="loc_cmcsa_ChangesInNetDeferredTaxLiabilityRelatedToOtherComprehensiveIncome_c7e19ab1-0299-4475-bbb2-4ea26bbfc184" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_f4259670-0aaf-420f-ab0d-dd3defb86b8f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLossCarryforwards"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_IncomeTaxesLineItems_4028c4d5-ad77-4f1a-987c-bafb176680d3" xlink:to="loc_us-gaap_OperatingLossCarryforwards_f4259670-0aaf-420f-ab0d-dd3defb86b8f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_679848b0-2776-4346-9c1f-60c7fa8e3e5f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_IncomeTaxesLineItems_4028c4d5-ad77-4f1a-987c-bafb176680d3" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_679848b0-2776-4346-9c1f-60c7fa8e3e5f" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_IncomeTaxesTable_d059975e-3110-46fd-af53-8156d97a93f2" xlink:href="cmcsa-20221231.xsd#cmcsa_IncomeTaxesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_cmcsa_IncomeTaxesLineItems_4028c4d5-ad77-4f1a-987c-bafb176680d3" xlink:to="loc_cmcsa_IncomeTaxesTable_d059975e-3110-46fd-af53-8156d97a93f2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityAxis_e63d3b33-834b-455e-901a-f6c5ccfafb54" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_cmcsa_IncomeTaxesTable_d059975e-3110-46fd-af53-8156d97a93f2" xlink:to="loc_us-gaap_IncomeTaxAuthorityAxis_e63d3b33-834b-455e-901a-f6c5ccfafb54" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_e63d3b33-834b-455e-901a-f6c5ccfafb54_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_e63d3b33-834b-455e-901a-f6c5ccfafb54" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_e63d3b33-834b-455e-901a-f6c5ccfafb54_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxAuthorityDomain_eecd1525-eefb-436d-bd52-62a7e5309411" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeTaxAuthorityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeTaxAuthorityAxis_e63d3b33-834b-455e-901a-f6c5ccfafb54" xlink:to="loc_us-gaap_IncomeTaxAuthorityDomain_eecd1525-eefb-436d-bd52-62a7e5309411" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DomesticCountryMember_a00c95da-d7d1-4586-8e7b-ad9f670ea776" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DomesticCountryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_eecd1525-eefb-436d-bd52-62a7e5309411" xlink:to="loc_us-gaap_DomesticCountryMember_a00c95da-d7d1-4586-8e7b-ad9f670ea776" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCountryMember_b483d108-1b40-4719-a416-3552fb97a79b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCountryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeTaxAuthorityDomain_eecd1525-eefb-436d-bd52-62a7e5309411" xlink:to="loc_us-gaap_ForeignCountryMember_b483d108-1b40-4719-a416-3552fb97a79b" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/LongTermDebtScheduleofDebtOutstandingDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#LongTermDebtScheduleofDebtOutstandingDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/LongTermDebtScheduleofDebtOutstandingDetails" xlink:type="extended" id="i485a86c5b4bc4fbe83614294a4c8dc83_LongTermDebtScheduleofDebtOutstandingDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtWeightedAverageInterestRate_e8ccd97f-d349-483a-8394-586b0049cc29" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtWeightedAverageInterestRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:to="loc_us-gaap_LongtermDebtWeightedAverageInterestRate_e8ccd97f-d349-483a-8394-586b0049cc29" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_850936df-b3f9-4196-abd5-99ac29547349" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCarryingAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_850936df-b3f9-4196-abd5-99ac29547349" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_FinanceLeaseObligationAndOther_c99ec493-430f-4036-a885-fc9b5d51abf7" xlink:href="cmcsa-20221231.xsd#cmcsa_FinanceLeaseObligationAndOther"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:to="loc_cmcsa_FinanceLeaseObligationAndOther_c99ec493-430f-4036-a885-fc9b5d51abf7" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DebtIssuanceCostsPremiumsDiscountsAndFairValueAdjustmentsForAcquisitionAccountingAndHedgedPositions_04ec6bbd-7536-4bf8-9e91-16cde85187f9" xlink:href="cmcsa-20221231.xsd#cmcsa_DebtIssuanceCostsPremiumsDiscountsAndFairValueAdjustmentsForAcquisitionAccountingAndHedgedPositions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:to="loc_cmcsa_DebtIssuanceCostsPremiumsDiscountsAndFairValueAdjustmentsForAcquisitionAccountingAndHedgedPositions_04ec6bbd-7536-4bf8-9e91-16cde85187f9" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_5b07ffd3-eb02-415e-9be9-1ef17d4a1418" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_5b07ffd3-eb02-415e-9be9-1ef17d4a1418" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtCurrent_9526f9fb-2445-4f8d-85c3-a51d7de47a7f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:to="loc_us-gaap_DebtCurrent_9526f9fb-2445-4f8d-85c3-a51d7de47a7f" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_208219c7-70bb-4119-8484-9b446bab6eee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_208219c7-70bb-4119-8484-9b446bab6eee" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_fd443e52-6f9d-4cfb-ba73-fcf142668bb4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentFaceAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_fd443e52-6f9d-4cfb-ba73-fcf142668bb4" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_b929aa0b-4114-4419-a3e8-b963381ed31d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_53ab3c1f-a7a1-4c4f-9a89-9cad1046e8cb" xlink:to="loc_us-gaap_DebtInstrumentTable_b929aa0b-4114-4419-a3e8-b963381ed31d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_f04a0a6c-c6fd-4998-b172-160b97686d7e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b929aa0b-4114-4419-a3e8-b963381ed31d" xlink:to="loc_us-gaap_DebtInstrumentAxis_f04a0a6c-c6fd-4998-b172-160b97686d7e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f04a0a6c-c6fd-4998-b172-160b97686d7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_f04a0a6c-c6fd-4998-b172-160b97686d7e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f04a0a6c-c6fd-4998-b172-160b97686d7e_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_62612a22-ec1e-417a-86eb-c42baba3430d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_f04a0a6c-c6fd-4998-b172-160b97686d7e" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_62612a22-ec1e-417a-86eb-c42baba3430d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MaturingInFiveYearsOrLessMember_ce7e3c45-bebe-4b26-ab0b-7ea01bd1c95f" xlink:href="cmcsa-20221231.xsd#cmcsa_MaturingInFiveYearsOrLessMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_62612a22-ec1e-417a-86eb-c42baba3430d" xlink:to="loc_cmcsa_MaturingInFiveYearsOrLessMember_ce7e3c45-bebe-4b26-ab0b-7ea01bd1c95f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MaturingBetweenFiveAndTenYearsMember_886dee1d-dba5-410e-a3a5-e9b6aab39fd9" xlink:href="cmcsa-20221231.xsd#cmcsa_MaturingBetweenFiveAndTenYearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_62612a22-ec1e-417a-86eb-c42baba3430d" xlink:to="loc_cmcsa_MaturingBetweenFiveAndTenYearsMember_886dee1d-dba5-410e-a3a5-e9b6aab39fd9" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MaturingInGreaterThan10YearsMember_d51dc10b-4272-439d-8b20-0e21ef133973" xlink:href="cmcsa-20221231.xsd#cmcsa_MaturingInGreaterThan10YearsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_62612a22-ec1e-417a-86eb-c42baba3430d" xlink:to="loc_cmcsa_MaturingInGreaterThan10YearsMember_d51dc10b-4272-439d-8b20-0e21ef133973" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_f4c0955a-3b74-47f1-9acd-c5b01f8b27a1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_b929aa0b-4114-4419-a3e8-b963381ed31d" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_f4c0955a-3b74-47f1-9acd-c5b01f8b27a1" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_f4c0955a-3b74-47f1-9acd-c5b01f8b27a1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_f4c0955a-3b74-47f1-9acd-c5b01f8b27a1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_f4c0955a-3b74-47f1-9acd-c5b01f8b27a1_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_e0bd406a-d091-4efe-9faa-5b875599e6ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_f4c0955a-3b74-47f1-9acd-c5b01f8b27a1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_e0bd406a-d091-4efe-9faa-5b875599e6ec" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_a06f9c62-eaf9-4df4-82e4-adf1f654dcd8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_e0bd406a-d091-4efe-9faa-5b875599e6ec" xlink:to="loc_us-gaap_CommercialPaperMember_a06f9c62-eaf9-4df4-82e4-adf1f654dcd8" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_TermLoansMember_c971cea3-9cb3-40b7-b7da-b0a2ae22c9c3" xlink:href="cmcsa-20221231.xsd#cmcsa_TermLoansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_e0bd406a-d091-4efe-9faa-5b875599e6ec" xlink:to="loc_cmcsa_TermLoansMember_c971cea3-9cb3-40b7-b7da-b0a2ae22c9c3" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_14b031d3-8110-422b-989d-18dfe06c8f7a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SeniorNotesMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_e0bd406a-d091-4efe-9faa-5b875599e6ec" xlink:to="loc_us-gaap_SeniorNotesMember_14b031d3-8110-422b-989d-18dfe06c8f7a" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ForeignCurrencyDenominatedSeniorNotesAndTermLoansMemberMember_acbe0b22-07db-4061-8877-076b20539b67" xlink:href="cmcsa-20221231.xsd#cmcsa_ForeignCurrencyDenominatedSeniorNotesAndTermLoansMemberMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_e0bd406a-d091-4efe-9faa-5b875599e6ec" xlink:to="loc_cmcsa_ForeignCurrencyDenominatedSeniorNotesAndTermLoansMemberMember_acbe0b22-07db-4061-8877-076b20539b67" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_0fcec859-cb1a-4e68-8ba8-ba659fa739d5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_0fcec859-cb1a-4e68-8ba8-ba659fa739d5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_514e5a96-75a7-4bcb-a92a-a757ab9e7498" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_433327eb-f72a-4900-ab14-c274cd8466ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_TermLoansMember_5f50542c-912f-4d6c-b98b-ad0f57342346" xlink:href="cmcsa-20221231.xsd#cmcsa_TermLoansMember"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_8dc8ed1c-100e-491a-86ce-464933ab03b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SeniorNotesMember"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/LongTermDebtNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#LongTermDebtNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/LongTermDebtNarrativeDetails" xlink:type="extended" id="ib17da8645e274fbdade0b52bb1ed407c_LongTermDebtNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_b97d7189-4c35-4b85-a6c6-b9c6118235a5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebtFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_LongTermDebtFairValue_b97d7189-4c35-4b85-a6c6-b9c6118235a5" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AmountOfForeignCurrencyDenominatedIntercompanyLoansReceivableHedged_d79df7b0-19b9-42df-8ed5-87ad64f5a41b" xlink:href="cmcsa-20221231.xsd#cmcsa_AmountOfForeignCurrencyDenominatedIntercompanyLoansReceivableHedged"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_cmcsa_AmountOfForeignCurrencyDenominatedIntercompanyLoansReceivableHedged_d79df7b0-19b9-42df-8ed5-87ad64f5a41b" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AmountOfForeignCurrencyDenominatedDebtHedged_75fadbe3-6541-4a45-b834-16ba98826a01" xlink:href="cmcsa-20221231.xsd#cmcsa_AmountOfForeignCurrencyDenominatedDebtHedged"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_cmcsa_AmountOfForeignCurrencyDenominatedDebtHedged_75fadbe3-6541-4a45-b834-16ba98826a01" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_ee22aea8-9b57-44c5-bb7a-c8ed5f286cdd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet_ee22aea8-9b57-44c5-bb7a-c8ed5f286cdd" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_225a4eee-e5b6-45cc-a500-de355714d576" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GainLossOnDerivativeInstrumentsNetPretax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_GainLossOnDerivativeInstrumentsNetPretax_225a4eee-e5b6-45cc-a500-de355714d576" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_aedc2124-c693-4322-b0ef-3896032bf941" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_aedc2124-c693-4322-b0ef-3896032bf941" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AmountOfNetInvestmentInForeignSubsidiariesHedged_c5c26686-88da-4559-9ef1-690ab111c8e9" xlink:href="cmcsa-20221231.xsd#cmcsa_AmountOfNetInvestmentInForeignSubsidiariesHedged"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_cmcsa_AmountOfNetInvestmentInForeignSubsidiariesHedged_c5c26686-88da-4559-9ef1-690ab111c8e9" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax_6ba02b09-1e0c-48dd-98c4-66ae84b64786" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetInvestmentHedgeGainLossBeforeReclassificationAndTax_6ba02b09-1e0c-48dd-98c4-66ae84b64786" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AmountOfFixedRateDebtHedged_c042cc27-63e2-47b4-b805-2c676b0ae6c8" xlink:href="cmcsa-20221231.xsd#cmcsa_AmountOfFixedRateDebtHedged"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_cmcsa_AmountOfFixedRateDebtHedged_c042cc27-63e2-47b4-b805-2c676b0ae6c8" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_f254d29c-1697-4695-af58-5612f9f4c5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_f254d29c-1697-4695-af58-5612f9f4c5a7" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_LineOfCreditFacilityPotentialIncreaseToMaximumBorrowingCapacity_7afa96c0-a831-4a1f-b536-88697bcd3e33" xlink:href="cmcsa-20221231.xsd#cmcsa_LineOfCreditFacilityPotentialIncreaseToMaximumBorrowingCapacity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_cmcsa_LineOfCreditFacilityPotentialIncreaseToMaximumBorrowingCapacity_7afa96c0-a831-4a1f-b536-88697bcd3e33" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_67bf13bd-8253-463e-82f5-70cbf5d037d9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_67bf13bd-8253-463e-82f5-70cbf5d037d9" xlink:type="arc" order="11"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_7d973aac-89f0-423e-b537-ce591155b9dc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCarryingAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_7d973aac-89f0-423e-b537-ce591155b9dc" xlink:type="arc" order="12"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_1221d091-47c6-437d-be67-cae88f567c83" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_1221d091-47c6-437d-be67-cae88f567c83" xlink:type="arc" order="13"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_LettersOfCreditAndBankGuaranteesOutstandingAmount_51ac65a6-871c-4954-a947-bff466725b46" xlink:href="cmcsa-20221231.xsd#cmcsa_LettersOfCreditAndBankGuaranteesOutstandingAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_cmcsa_LettersOfCreditAndBankGuaranteesOutstandingAmount_51ac65a6-871c-4954-a947-bff466725b46" xlink:type="arc" order="14"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_4022a34d-f8fa-4ed4-9df5-72a993af39be" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_73187dcf-44da-4c87-9717-c222d9e4cf09" xlink:to="loc_us-gaap_DebtInstrumentTable_4022a34d-f8fa-4ed4-9df5-72a993af39be" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_206819d6-7720-43cf-aa6d-15d56a7187f6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4022a34d-f8fa-4ed4-9df5-72a993af39be" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_206819d6-7720-43cf-aa6d-15d56a7187f6" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_206819d6-7720-43cf-aa6d-15d56a7187f6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_HedgingRelationshipDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_206819d6-7720-43cf-aa6d-15d56a7187f6" xlink:to="loc_us-gaap_HedgingRelationshipDomain_206819d6-7720-43cf-aa6d-15d56a7187f6_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingRelationshipDomain_ddc7668d-5696-4c47-983d-938b19e17eba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_HedgingRelationshipDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_206819d6-7720-43cf-aa6d-15d56a7187f6" xlink:to="loc_us-gaap_HedgingRelationshipDomain_ddc7668d-5696-4c47-983d-938b19e17eba" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentHedgingMember_d563dced-d2a8-416e-8f71-dd57ad0c51b9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NetInvestmentHedgingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_ddc7668d-5696-4c47-983d-938b19e17eba" xlink:to="loc_us-gaap_NetInvestmentHedgingMember_d563dced-d2a8-416e-8f71-dd57ad0c51b9" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashFlowHedgingMember_3cb8f4a0-6fb7-4ea5-8572-80eacc766cdf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CashFlowHedgingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_ddc7668d-5696-4c47-983d-938b19e17eba" xlink:to="loc_us-gaap_CashFlowHedgingMember_3cb8f4a0-6fb7-4ea5-8572-80eacc766cdf" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueHedgingMember_562cbfb5-1d0c-4b9b-be07-122021c36c99" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueHedgingMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingRelationshipDomain_ddc7668d-5696-4c47-983d-938b19e17eba" xlink:to="loc_us-gaap_FairValueHedgingMember_562cbfb5-1d0c-4b9b-be07-122021c36c99" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_40721efa-3ea3-4a41-b60f-4acd5075ddf9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeInstrumentRiskAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4022a34d-f8fa-4ed4-9df5-72a993af39be" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_40721efa-3ea3-4a41-b60f-4acd5075ddf9" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_40721efa-3ea3-4a41-b60f-4acd5075ddf9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeContractTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_40721efa-3ea3-4a41-b60f-4acd5075ddf9" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_40721efa-3ea3-4a41-b60f-4acd5075ddf9_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_f009d548-d28f-4892-a7f2-5451688f6e38" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DerivativeContractTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_40721efa-3ea3-4a41-b60f-4acd5075ddf9" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_f009d548-d28f-4892-a7f2-5451688f6e38" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_b62aae94-75fd-41ea-84eb-921b5736c164" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CurrencySwapMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f009d548-d28f-4892-a7f2-5451688f6e38" xlink:to="loc_us-gaap_CurrencySwapMember_b62aae94-75fd-41ea-84eb-921b5736c164" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_e9a1e8e0-ca33-40d0-842e-f309dc5822e4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InterestRateSwapMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f009d548-d28f-4892-a7f2-5451688f6e38" xlink:to="loc_us-gaap_InterestRateSwapMember_e9a1e8e0-ca33-40d0-842e-f309dc5822e4" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_0c1d1ebe-ec00-48b1-905b-fefc064f601f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ForeignExchangeForwardMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f009d548-d28f-4892-a7f2-5451688f6e38" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_0c1d1ebe-ec00-48b1-905b-fefc064f601f" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_787f4509-3fe2-46fe-8f42-7407ad091ccc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4022a34d-f8fa-4ed4-9df5-72a993af39be" xlink:to="loc_us-gaap_FinancialInstrumentAxis_787f4509-3fe2-46fe-8f42-7407ad091ccc" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_787f4509-3fe2-46fe-8f42-7407ad091ccc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_787f4509-3fe2-46fe-8f42-7407ad091ccc" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_787f4509-3fe2-46fe-8f42-7407ad091ccc_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1332f0aa-30a8-469e-8523-a39dc4ee6733" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_787f4509-3fe2-46fe-8f42-7407ad091ccc" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1332f0aa-30a8-469e-8523-a39dc4ee6733" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ForeignCurrencyDenominatedDebtMember_e4335eef-e8ad-4569-a040-a8e24d031c44" xlink:href="cmcsa-20221231.xsd#cmcsa_ForeignCurrencyDenominatedDebtMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1332f0aa-30a8-469e-8523-a39dc4ee6733" xlink:to="loc_cmcsa_ForeignCurrencyDenominatedDebtMember_e4335eef-e8ad-4569-a040-a8e24d031c44" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrencySwapMember_9e5dab20-14d7-4114-98bb-08b9959c6f04" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CurrencySwapMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_1332f0aa-30a8-469e-8523-a39dc4ee6733" xlink:to="loc_us-gaap_CurrencySwapMember_9e5dab20-14d7-4114-98bb-08b9959c6f04" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_2c6d62f9-1698-4998-b7f7-038c484fe4d6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4022a34d-f8fa-4ed4-9df5-72a993af39be" xlink:to="loc_us-gaap_VariableRateAxis_2c6d62f9-1698-4998-b7f7-038c484fe4d6" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_2c6d62f9-1698-4998-b7f7-038c484fe4d6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_2c6d62f9-1698-4998-b7f7-038c484fe4d6" xlink:to="loc_us-gaap_VariableRateDomain_2c6d62f9-1698-4998-b7f7-038c484fe4d6_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_4b93c89d-64d3-4ea9-8094-b63f3a3262a8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableRateDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_2c6d62f9-1698-4998-b7f7-038c484fe4d6" xlink:to="loc_us-gaap_VariableRateDomain_4b93c89d-64d3-4ea9-8094-b63f3a3262a8" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_SecuredOvernightFinancingRateSOFRMember_c3911018-9357-432b-bf51-a7873b1998c3" xlink:href="cmcsa-20221231.xsd#cmcsa_SecuredOvernightFinancingRateSOFRMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_4b93c89d-64d3-4ea9-8094-b63f3a3262a8" xlink:to="loc_cmcsa_SecuredOvernightFinancingRateSOFRMember_c3911018-9357-432b-bf51-a7873b1998c3" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_0e2fc889-c805-4d11-bf9d-b98b091ea3a8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4022a34d-f8fa-4ed4-9df5-72a993af39be" xlink:to="loc_us-gaap_CreditFacilityAxis_0e2fc889-c805-4d11-bf9d-b98b091ea3a8" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_0e2fc889-c805-4d11-bf9d-b98b091ea3a8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_0e2fc889-c805-4d11-bf9d-b98b091ea3a8" xlink:to="loc_us-gaap_CreditFacilityDomain_0e2fc889-c805-4d11-bf9d-b98b091ea3a8_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_0cf90fc7-0859-42f3-9a4c-abe7c9c3e7a6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CreditFacilityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_0e2fc889-c805-4d11-bf9d-b98b091ea3a8" xlink:to="loc_us-gaap_CreditFacilityDomain_0cf90fc7-0859-42f3-9a4c-abe7c9c3e7a6" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_4ec6bde8-45dc-4b6e-aa46-883d0d71d35d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RevolvingCreditFacilityMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_0cf90fc7-0859-42f3-9a4c-abe7c9c3e7a6" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_4ec6bde8-45dc-4b6e-aa46-883d0d71d35d" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_0a395343-5a1a-4dfd-9a0d-94244b3d2148" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4022a34d-f8fa-4ed4-9df5-72a993af39be" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_0a395343-5a1a-4dfd-9a0d-94244b3d2148" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_0a395343-5a1a-4dfd-9a0d-94244b3d2148_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_0a395343-5a1a-4dfd-9a0d-94244b3d2148" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_0a395343-5a1a-4dfd-9a0d-94244b3d2148_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_139f51ea-42a1-4605-a4cf-cd0fa1242b62" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongtermDebtTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_0a395343-5a1a-4dfd-9a0d-94244b3d2148" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_139f51ea-42a1-4605-a4cf-cd0fa1242b62" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPaperMember_2e0df549-6da5-45b5-9187-bdc668547250" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommercialPaperMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_139f51ea-42a1-4605-a4cf-cd0fa1242b62" xlink:to="loc_us-gaap_CommercialPaperMember_2e0df549-6da5-45b5-9187-bdc668547250" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_cd908b3f-6c20-4c7c-808c-377334e1fc7c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_4022a34d-f8fa-4ed4-9df5-72a993af39be" xlink:to="loc_us-gaap_DebtInstrumentAxis_cd908b3f-6c20-4c7c-808c-377334e1fc7c" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_cd908b3f-6c20-4c7c-808c-377334e1fc7c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_cd908b3f-6c20-4c7c-808c-377334e1fc7c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_cd908b3f-6c20-4c7c-808c-377334e1fc7c_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_490bceed-064c-48df-b18d-bd469cd39b9b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_cd908b3f-6c20-4c7c-808c-377334e1fc7c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_490bceed-064c-48df-b18d-bd469cd39b9b" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ForeignCurrencyDenominatedDebtObligationsAndIntercompanyFundingArrangementsDenominatedInACurrencyOtherThanFunctionalMember_f5441c0c-45bc-4388-a5ba-41c2e3ff12f6" xlink:href="cmcsa-20221231.xsd#cmcsa_ForeignCurrencyDenominatedDebtObligationsAndIntercompanyFundingArrangementsDenominatedInACurrencyOtherThanFunctionalMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_490bceed-064c-48df-b18d-bd469cd39b9b" xlink:to="loc_cmcsa_ForeignCurrencyDenominatedDebtObligationsAndIntercompanyFundingArrangementsDenominatedInACurrencyOtherThanFunctionalMember_f5441c0c-45bc-4388-a5ba-41c2e3ff12f6" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/SignificantTransactionsDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#SignificantTransactionsDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/SignificantTransactionsDetails" xlink:type="extended" id="ie7423aa5785b4ce5944e932df6d8cd91_SignificantTransactionsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionLineItems_19fc131d-97ea-4efe-bf55-f4196ee63cb0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_40ebfbc3-9bb8-4df3-8933-55eb681cda79" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_19fc131d-97ea-4efe-bf55-f4196ee63cb0" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_40ebfbc3-9bb8-4df3-8933-55eb681cda79" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_21288d8b-d86c-47b6-8af2-3de007b9bc8c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_19fc131d-97ea-4efe-bf55-f4196ee63cb0" xlink:to="loc_us-gaap_Goodwill_21288d8b-d86c-47b6-8af2-3de007b9bc8c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetAcquisitionTable_c6a8a6ea-27c7-45f5-872c-b1180333174d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetAcquisitionTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AssetAcquisitionLineItems_19fc131d-97ea-4efe-bf55-f4196ee63cb0" xlink:to="loc_us-gaap_AssetAcquisitionTable_c6a8a6ea-27c7-45f5-872c-b1180333174d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_16cc5b6a-694d-4d00-92fc-72aa4f93d2d2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AssetAcquisitionTable_c6a8a6ea-27c7-45f5-872c-b1180333174d" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_16cc5b6a-694d-4d00-92fc-72aa4f93d2d2" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_16cc5b6a-694d-4d00-92fc-72aa4f93d2d2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_16cc5b6a-694d-4d00-92fc-72aa4f93d2d2" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_16cc5b6a-694d-4d00-92fc-72aa4f93d2d2_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e9535097-7843-4b18-bae9-00711ea54daa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_16cc5b6a-694d-4d00-92fc-72aa4f93d2d2" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e9535097-7843-4b18-bae9-00711ea54daa" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MasergyMember_751961de-9404-4543-8498-088d1f81cb8e" xlink:href="cmcsa-20221231.xsd#cmcsa_MasergyMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_e9535097-7843-4b18-bae9-00711ea54daa" xlink:to="loc_cmcsa_MasergyMember_751961de-9404-4543-8498-088d1f81cb8e" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/InvestmentsandVariableInterestEntitiesNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#InvestmentsandVariableInterestEntitiesNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/InvestmentsandVariableInterestEntitiesNarrativeDetails" xlink:type="extended" id="i32942cd9d55b4b75b6807deaf5e2961d_InvestmentsandVariableInterestEntitiesNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_2074d033-1d89-46b6-8fc6-f3f69f774b26" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_EquitySecuritiesFvNiUnrealizedGainLoss_2074d033-1d89-46b6-8fc6-f3f69f774b26" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentDividendsOrDistributions_66598167-0354-42d0-9afa-9b70e3b8dcb4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityMethodInvestmentDividendsOrDistributions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_EquityMethodInvestmentDividendsOrDistributions_66598167-0354-42d0-9afa-9b70e3b8dcb4" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentInvestmentTerm_1257f117-5524-4533-8301-48835c06d58a" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentInvestmentTerm"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentInvestmentTerm_1257f117-5524-4533-8301-48835c06d58a" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentFundingCommitment_2bf70b72-17ca-4ddc-9056-65b39d5df8d0" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentFundingCommitment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentFundingCommitment_2bf70b72-17ca-4ddc-9056-65b39d5df8d0" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentAnnualCapitalCallsMaximumAmount_bdc03f85-7ccc-41f9-9b27-2628db33aed0" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentAnnualCapitalCallsMaximumAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentAnnualCapitalCallsMaximumAmount_bdc03f85-7ccc-41f9-9b27-2628db33aed0" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentManagementFeeFundingCommitment_a22bc131-74e4-4cdb-a633-393d3d1b89ab" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentManagementFeeFundingCommitment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentManagementFeeFundingCommitment_a22bc131-74e4-4cdb-a633-393d3d1b89ab" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentFundingCommitmentByManagementCompanyInvestors_eebb5bc6-83f2-4253-a65e-5024d9ce3c11" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentFundingCommitmentByManagementCompanyInvestors"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentFundingCommitmentByManagementCompanyInvestors_eebb5bc6-83f2-4253-a65e-5024d9ce3c11" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentPercentOfLosses_97332ac4-0d7a-408b-95d1-9bee127157bf" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentPercentOfLosses"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentPercentOfLosses_97332ac4-0d7a-408b-95d1-9bee127157bf" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_PercentageOfResidualReturns_d016ea40-cc80-422c-83d3-b539ff0857eb" xlink:href="cmcsa-20221231.xsd#cmcsa_PercentageOfResidualReturns"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_PercentageOfResidualReturns_d016ea40-cc80-422c-83d3-b539ff0857eb" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_VariableInterestEntityReportingEntityInvolvementUnfundedCapitalCommitment_cf6de6ae-19ca-4aab-a511-8f2a6060c31e" xlink:href="cmcsa-20221231.xsd#cmcsa_VariableInterestEntityReportingEntityInvolvementUnfundedCapitalCommitment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_VariableInterestEntityReportingEntityInvolvementUnfundedCapitalCommitment_cf6de6ae-19ca-4aab-a511-8f2a6060c31e" xlink:type="arc" order="9"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CapitalContributionToVIE_f4e3c8a5-bf98-4b4f-a60d-92796c36dce1" xlink:href="cmcsa-20221231.xsd#cmcsa_CapitalContributionToVIE"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_CapitalContributionToVIE_f4e3c8a5-bf98-4b4f-a60d-92796c36dce1" xlink:type="arc" order="10"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentsAndCertainRetainedDistributions_1effcf57-61c1-451d-ae22-d8b2fb948f88" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentsAndCertainRetainedDistributions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentsAndCertainRetainedDistributions_1effcf57-61c1-451d-ae22-d8b2fb948f88" xlink:type="arc" order="11"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_287110d6-909c-4278-a028-bfb88321f2ec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_EquityMethodInvestmentOwnershipPercentage_287110d6-909c-4278-a028-bfb88321f2ec" xlink:type="arc" order="12"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentMaximumTotalCapitalCallInAnnualPeriod_334b4766-413f-4c09-a992-bd06d0d1ada4" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentMaximumTotalCapitalCallInAnnualPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentMaximumTotalCapitalCallInAnnualPeriod_334b4766-413f-4c09-a992-bd06d0d1ada4" xlink:type="arc" order="13"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentOwnershipPercentageFloor_f7f2917b-ab93-429a-9f99-b3073b7997bf" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentOwnershipPercentageFloor"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentOwnershipPercentageFloor_f7f2917b-ab93-429a-9f99-b3073b7997bf" xlink:type="arc" order="14"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentFairMarketValueFloorForPutAndCallOption_0c265213-172d-4e6e-9ce6-b5afb1b6d826" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentFairMarketValueFloorForPutAndCallOption"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentFairMarketValueFloorForPutAndCallOption_0c265213-172d-4e6e-9ce6-b5afb1b6d826" xlink:type="arc" order="15"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentOwnershipPercentageRepresentingFairMarketValueFloorForPutAndCallOption_1eed6538-9283-4ade-bcc7-878ac761540c" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentOwnershipPercentageRepresentingFairMarketValueFloorForPutAndCallOption"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentOwnershipPercentageRepresentingFairMarketValueFloorForPutAndCallOption_1eed6538-9283-4ade-bcc7-878ac761540c" xlink:type="arc" order="16"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_EquityMethodInvestmentMinimumGuaranteedProceedsFloorForPutAndCallOption_4edf2116-4782-410e-86ef-a1fc8ae8f6a3" xlink:href="cmcsa-20221231.xsd#cmcsa_EquityMethodInvestmentMinimumGuaranteedProceedsFloorForPutAndCallOption"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_EquityMethodInvestmentMinimumGuaranteedProceedsFloorForPutAndCallOption_4edf2116-4782-410e-86ef-a1fc8ae8f6a3" xlink:type="arc" order="17"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ProceedsFromCollateralizedObligation_79cf67b6-26f3-4f1f-a04d-7231739f2bd2" xlink:href="cmcsa-20221231.xsd#cmcsa_ProceedsFromCollateralizedObligation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_ProceedsFromCollateralizedObligation_79cf67b6-26f3-4f1f-a04d-7231739f2bd2" xlink:type="arc" order="18"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CollateralizedObligation_91b5ab70-c29c-42ea-8906-1fb815173f39" xlink:href="cmcsa-20221231.xsd#cmcsa_CollateralizedObligation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_CollateralizedObligation_91b5ab70-c29c-42ea-8906-1fb815173f39" xlink:type="arc" order="19"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CollateralizedObligationFairValue_c9eddfd3-abd8-40ca-96f4-e198143b04a2" xlink:href="cmcsa-20221231.xsd#cmcsa_CollateralizedObligationFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_cmcsa_CollateralizedObligationFairValue_c9eddfd3-abd8-40ca-96f4-e198143b04a2" xlink:type="arc" order="20"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_5e8234fc-3b13-4f4f-831f-59aac505ce9a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_MinorityInterestOwnershipPercentageByParent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_MinorityInterestOwnershipPercentageByParent_5e8234fc-3b13-4f4f-831f-59aac505ce9a" xlink:type="arc" order="21"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e54949c3-0233-4fdf-b42e-52af3b2ac7b2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e54949c3-0233-4fdf-b42e-52af3b2ac7b2" xlink:type="arc" order="22"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_be1481e6-b23a-47b7-86d9-7b8003e063ff" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LongTermDebt"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_LongTermDebt_be1481e6-b23a-47b7-86d9-7b8003e063ff" xlink:type="arc" order="23"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_f38081b5-cbe0-440e-8888-3ef22e3649e7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentCarryingAmount"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_f38081b5-cbe0-440e-8888-3ef22e3649e7" xlink:type="arc" order="24"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_09cc039f-0694-4aa3-b059-afe62b5c9dec" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Assets"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_Assets_09cc039f-0694-4aa3-b059-afe62b5c9dec" xlink:type="arc" order="25"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_82863ffd-54d2-4a2b-902a-d9171b45aae5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Liabilities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_Liabilities_82863ffd-54d2-4a2b-902a-d9171b45aae5" xlink:type="arc" order="26"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_0347b887-ecf7-4806-af07-83845d91ae5b" xlink:to="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_b9fa9e2f-489f-4c20-ad14-7fff364b7fc3" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:to="loc_srt_TitleOfIndividualAxis_b9fa9e2f-489f-4c20-ad14-7fff364b7fc3" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_b9fa9e2f-489f-4c20-ad14-7fff364b7fc3_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_b9fa9e2f-489f-4c20-ad14-7fff364b7fc3" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_b9fa9e2f-489f-4c20-ad14-7fff364b7fc3_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_9a8e267b-a5b4-417c-a1ef-49f2ee71d441" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_b9fa9e2f-489f-4c20-ad14-7fff364b7fc3" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_9a8e267b-a5b4-417c-a1ef-49f2ee71d441" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_FormerCFOMember_10db646c-66b2-4d37-adf8-871742ad58d8" xlink:href="cmcsa-20221231.xsd#cmcsa_FormerCFOMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_9a8e267b-a5b4-417c-a1ef-49f2ee71d441" xlink:to="loc_cmcsa_FormerCFOMember_10db646c-66b2-4d37-adf8-871742ad58d8" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01d16682-34d6-4e6b-b7e4-56d12b3156ec" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01d16682-34d6-4e6b-b7e4-56d12b3156ec" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_01d16682-34d6-4e6b-b7e4-56d12b3156ec_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_EquityMethodInvesteeNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01d16682-34d6-4e6b-b7e4-56d12b3156ec" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_01d16682-34d6-4e6b-b7e4-56d12b3156ec_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_60b1018e-0fe7-4c5d-b84b-3d5d83287c55" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_EquityMethodInvesteeNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_01d16682-34d6-4e6b-b7e4-56d12b3156ec" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_60b1018e-0fe7-4c5d-b84b-3d5d83287c55" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AtairosMember_c9669738-b580-4b07-ae08-dc87a7937cbd" xlink:href="cmcsa-20221231.xsd#cmcsa_AtairosMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_60b1018e-0fe7-4c5d-b84b-3d5d83287c55" xlink:to="loc_cmcsa_AtairosMember_c9669738-b580-4b07-ae08-dc87a7937cbd" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_HuluMember_9bafc6f2-e934-496e-a036-0140646bcdc1" xlink:href="cmcsa-20221231.xsd#cmcsa_HuluMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_60b1018e-0fe7-4c5d-b84b-3d5d83287c55" xlink:to="loc_cmcsa_HuluMember_9bafc6f2-e934-496e-a036-0140646bcdc1" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b01ea872-a1e1-4692-9c03-67a200657171" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b01ea872-a1e1-4692-9c03-67a200657171" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b01ea872-a1e1-4692-9c03-67a200657171_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b01ea872-a1e1-4692-9c03-67a200657171" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b01ea872-a1e1-4692-9c03-67a200657171_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b13ad656-4b92-4132-b502-dd6831e0043e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_b01ea872-a1e1-4692-9c03-67a200657171" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b13ad656-4b92-4132-b502-dd6831e0043e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_cda239c1-e356-4389-85ba-cf58ff3fe443" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FairValueInputsLevel2Member"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_b13ad656-4b92-4132-b502-dd6831e0043e" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_cda239c1-e356-4389-85ba-cf58ff3fe443" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_c883ae9d-122d-4057-8c7a-a6f63a9e1a8b" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:to="loc_srt_ConsolidatedEntitiesAxis_c883ae9d-122d-4057-8c7a-a6f63a9e1a8b" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_c883ae9d-122d-4057-8c7a-a6f63a9e1a8b_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_c883ae9d-122d-4057-8c7a-a6f63a9e1a8b" xlink:to="loc_srt_ConsolidatedEntitiesDomain_c883ae9d-122d-4057-8c7a-a6f63a9e1a8b_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_0b40d3f5-bdf5-41ee-95d0-2ecf0eaa2de1" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidatedEntitiesDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_c883ae9d-122d-4057-8c7a-a6f63a9e1a8b" xlink:to="loc_srt_ConsolidatedEntitiesDomain_0b40d3f5-bdf5-41ee-95d0-2ecf0eaa2de1" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_012215fb-da6d-4948-9b2f-b574400afb35" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_0b40d3f5-bdf5-41ee-95d0-2ecf0eaa2de1" xlink:to="loc_us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember_012215fb-da6d-4948-9b2f-b574400afb35" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_971d999c-cc18-46d3-af0b-5808e84c3914" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_VariableInterestEntityPrimaryBeneficiaryMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_0b40d3f5-bdf5-41ee-95d0-2ecf0eaa2de1" xlink:to="loc_us-gaap_VariableInterestEntityPrimaryBeneficiaryMember_971d999c-cc18-46d3-af0b-5808e84c3914" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d1efc3d8-2881-4eda-97ed-9b3b7f43d5a8" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:to="loc_srt_RangeAxis_d1efc3d8-2881-4eda-97ed-9b3b7f43d5a8" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d1efc3d8-2881-4eda-97ed-9b3b7f43d5a8_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_d1efc3d8-2881-4eda-97ed-9b3b7f43d5a8" xlink:to="loc_srt_RangeMember_d1efc3d8-2881-4eda-97ed-9b3b7f43d5a8_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_71852ad8-7835-4128-9229-d93b8b58fbc8" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_RangeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_d1efc3d8-2881-4eda-97ed-9b3b7f43d5a8" xlink:to="loc_srt_RangeMember_71852ad8-7835-4128-9229-d93b8b58fbc8" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_d7f6a754-99f1-442d-9b04-3fe2c55821d4" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MinimumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_71852ad8-7835-4128-9229-d93b8b58fbc8" xlink:to="loc_srt_MinimumMember_d7f6a754-99f1-442d-9b04-3fe2c55821d4" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_9661c57b-a1ca-4358-9e1e-3b26729b391e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_MaximumMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_71852ad8-7835-4128-9229-d93b8b58fbc8" xlink:to="loc_srt_MaximumMember_9661c57b-a1ca-4358-9e1e-3b26729b391e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_f1ea95ef-199d-415c-af14-742aebe876f7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:to="loc_us-gaap_FinancialInstrumentAxis_f1ea95ef-199d-415c-af14-742aebe876f7" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f1ea95ef-199d-415c-af14-742aebe876f7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_f1ea95ef-199d-415c-af14-742aebe876f7" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f1ea95ef-199d-415c-af14-742aebe876f7_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0ac6d09f-f7bf-4877-9198-7ee433a473ba" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_f1ea95ef-199d-415c-af14-742aebe876f7" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0ac6d09f-f7bf-4877-9198-7ee433a473ba" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ShortTermInstrumentsMember_ab4f6c9e-fefd-4a21-8930-24534d4fbbe0" xlink:href="cmcsa-20221231.xsd#cmcsa_ShortTermInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0ac6d09f-f7bf-4877-9198-7ee433a473ba" xlink:to="loc_cmcsa_ShortTermInstrumentsMember_ab4f6c9e-fefd-4a21-8930-24534d4fbbe0" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_6e79e11a-4dcd-4f83-a2ca-c95d2955c72e" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_OwnershipAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:to="loc_srt_OwnershipAxis_6e79e11a-4dcd-4f83-a2ca-c95d2955c72e" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_6e79e11a-4dcd-4f83-a2ca-c95d2955c72e_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_OwnershipDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_6e79e11a-4dcd-4f83-a2ca-c95d2955c72e" xlink:to="loc_srt_OwnershipDomain_6e79e11a-4dcd-4f83-a2ca-c95d2955c72e_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_1c03810d-cc3e-4f66-8c85-404d646744a4" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_OwnershipDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_6e79e11a-4dcd-4f83-a2ca-c95d2955c72e" xlink:to="loc_srt_OwnershipDomain_1c03810d-cc3e-4f66-8c85-404d646744a4" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_UniversalBeijingResortMember_92dafc76-61e7-41e1-82a3-e0861b4fb871" xlink:href="cmcsa-20221231.xsd#cmcsa_UniversalBeijingResortMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_1c03810d-cc3e-4f66-8c85-404d646744a4" xlink:to="loc_cmcsa_UniversalBeijingResortMember_92dafc76-61e7-41e1-82a3-e0861b4fb871" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_f9aeadc6-2ab2-44b9-8dc0-3f29bd8084cf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEquityMethodInvestmentsTable_166be991-f4f8-4c28-bd9d-f5f0e16cba3e" xlink:to="loc_us-gaap_DebtInstrumentAxis_f9aeadc6-2ab2-44b9-8dc0-3f29bd8084cf" xlink:type="arc" order="8"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f9aeadc6-2ab2-44b9-8dc0-3f29bd8084cf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_f9aeadc6-2ab2-44b9-8dc0-3f29bd8084cf" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f9aeadc6-2ab2-44b9-8dc0-3f29bd8084cf_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_d5d062ed-fc6e-4140-8327-f77e9ffc69de" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DebtInstrumentNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_f9aeadc6-2ab2-44b9-8dc0-3f29bd8084cf" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_d5d062ed-fc6e-4140-8327-f77e9ffc69de" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_TermLoansMember_b4cc1833-746b-40a8-a2fb-34ff5e01751b" xlink:href="cmcsa-20221231.xsd#cmcsa_TermLoansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_d5d062ed-fc6e-4140-8327-f77e9ffc69de" xlink:to="loc_cmcsa_TermLoansMember_b4cc1833-746b-40a8-a2fb-34ff5e01751b" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/InvestmentsandVariableInterestEntitiesOtherInvestmentsDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#InvestmentsandVariableInterestEntitiesOtherInvestmentsDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/InvestmentsandVariableInterestEntitiesOtherInvestmentsDetails" xlink:type="extended" id="i37bd67df557e41f3b4eb347ee2e1865b_InvestmentsandVariableInterestEntitiesOtherInvestmentsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentHoldingsLineItems_f83dc2f6-8695-4a80-ae02-b8cf8d818e19" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentHoldingsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestments_f4ec7840-85be-49ff-9c1a-8d08390738b2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherInvestments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentHoldingsLineItems_f83dc2f6-8695-4a80-ae02-b8cf8d818e19" xlink:to="loc_us-gaap_OtherInvestments_f4ec7840-85be-49ff-9c1a-8d08390738b2" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NumberOfPreferredStockSeries_529aa088-ebc5-49f6-b111-d8286a0bbf33" xlink:href="cmcsa-20221231.xsd#cmcsa_NumberOfPreferredStockSeries"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentHoldingsLineItems_f83dc2f6-8695-4a80-ae02-b8cf8d818e19" xlink:to="loc_cmcsa_NumberOfPreferredStockSeries_529aa088-ebc5-49f6-b111-d8286a0bbf33" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_451fb744-702a-4c92-b1db-6856f4eebc81" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentHoldingsLineItems_f83dc2f6-8695-4a80-ae02-b8cf8d818e19" xlink:to="loc_us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities_451fb744-702a-4c92-b1db-6856f4eebc81" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_PaymentsForRepurchaseAndRedemptionOfSubsidiaryPreferredStock_0b36471d-0879-49f7-90a5-a655722d3a1f" xlink:href="cmcsa-20221231.xsd#cmcsa_PaymentsForRepurchaseAndRedemptionOfSubsidiaryPreferredStock"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentHoldingsLineItems_f83dc2f6-8695-4a80-ae02-b8cf8d818e19" xlink:to="loc_cmcsa_PaymentsForRepurchaseAndRedemptionOfSubsidiaryPreferredStock_0b36471d-0879-49f7-90a5-a655722d3a1f" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentHoldingsTable_c9405efb-e00c-42ca-97d6-a89f4c1094ee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_InvestmentHoldingsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InvestmentHoldingsLineItems_f83dc2f6-8695-4a80-ae02-b8cf8d818e19" xlink:to="loc_us-gaap_InvestmentHoldingsTable_c9405efb-e00c-42ca-97d6-a89f4c1094ee" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_f0b46f94-e217-48af-8a23-23c1447b7096" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InvestmentHoldingsTable_c9405efb-e00c-42ca-97d6-a89f4c1094ee" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_f0b46f94-e217-48af-8a23-23c1447b7096" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_f0b46f94-e217-48af-8a23-23c1447b7096_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_EquityMethodInvesteeNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_f0b46f94-e217-48af-8a23-23c1447b7096" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_f0b46f94-e217-48af-8a23-23c1447b7096_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_c019df0c-b672-4d46-a5d1-a06ffa2ad293" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_EquityMethodInvesteeNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_f0b46f94-e217-48af-8a23-23c1447b7096" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_c019df0c-b672-4d46-a5d1-a06ffa2ad293" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AirTouchMember_dda2cd3d-11c4-449b-83ef-3a0d27b04cfe" xlink:href="cmcsa-20221231.xsd#cmcsa_AirTouchMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_c019df0c-b672-4d46-a5d1-a06ffa2ad293" xlink:to="loc_cmcsa_AirTouchMember_dda2cd3d-11c4-449b-83ef-3a0d27b04cfe" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_174d141f-540f-4252-94d3-2fc2e3a968d3" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InvestmentHoldingsTable_c9405efb-e00c-42ca-97d6-a89f4c1094ee" xlink:to="loc_dei_LegalEntityAxis_174d141f-540f-4252-94d3-2fc2e3a968d3" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_174d141f-540f-4252-94d3-2fc2e3a968d3_default" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_174d141f-540f-4252-94d3-2fc2e3a968d3" xlink:to="loc_dei_EntityDomain_174d141f-540f-4252-94d3-2fc2e3a968d3_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_689a8e6f-b537-4795-bdb2-f15f7b903e7a" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_174d141f-540f-4252-94d3-2fc2e3a968d3" xlink:to="loc_dei_EntityDomain_689a8e6f-b537-4795-bdb2-f15f7b903e7a" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_AirTouchMember_8903ef9f-8a59-4849-9109-20c00a0fab31" xlink:href="cmcsa-20221231.xsd#cmcsa_AirTouchMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_689a8e6f-b537-4795-bdb2-f15f7b903e7a" xlink:to="loc_cmcsa_AirTouchMember_8903ef9f-8a59-4849-9109-20c00a0fab31" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_6716c716-f55b-4735-828c-eef704bd478c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FinancialInstrumentAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InvestmentHoldingsTable_c9405efb-e00c-42ca-97d6-a89f4c1094ee" xlink:to="loc_us-gaap_FinancialInstrumentAxis_6716c716-f55b-4735-828c-eef704bd478c" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6716c716-f55b-4735-828c-eef704bd478c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_6716c716-f55b-4735-828c-eef704bd478c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_6716c716-f55b-4735-828c-eef704bd478c_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8a4579ca-2193-4ef5-8712-582c377590e5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_6716c716-f55b-4735-828c-eef704bd478c" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8a4579ca-2193-4ef5-8712-582c377590e5" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ShortTermInstrumentsMember_80d41bc1-e0f5-4938-9340-f9305c248df4" xlink:href="cmcsa-20221231.xsd#cmcsa_ShortTermInstrumentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8a4579ca-2193-4ef5-8712-582c377590e5" xlink:to="loc_cmcsa_ShortTermInstrumentsMember_80d41bc1-e0f5-4938-9340-f9305c248df4" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/PropertyandEquipmentDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#PropertyandEquipmentDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/PropertyandEquipmentDetails" xlink:type="extended" id="ie0fb39afcf33467bae1f79f84c777fc1_PropertyandEquipmentDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_187f29e4-cde0-44e9-a058-16ffe9ed3005" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_b58d979d-5646-4b3b-a80c-913e1d19ce9c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_187f29e4-cde0-44e9-a058-16ffe9ed3005" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_b58d979d-5646-4b3b-a80c-913e1d19ce9c" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_7d5b84dc-12cc-4fb9-9afc-53d0883d7681" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentGross"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_187f29e4-cde0-44e9-a058-16ffe9ed3005" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_7d5b84dc-12cc-4fb9-9afc-53d0883d7681" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_3bed416a-1451-4d19-a434-270c914c5c36" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_187f29e4-cde0-44e9-a058-16ffe9ed3005" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_3bed416a-1451-4d19-a434-270c914c5c36" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_f3321e63-be6b-41e5-a22c-05f1b10daec0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentNet"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_187f29e4-cde0-44e9-a058-16ffe9ed3005" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_f3321e63-be6b-41e5-a22c-05f1b10daec0" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1c5c95de-8ac1-47f9-925c-cccebe518912" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_187f29e4-cde0-44e9-a058-16ffe9ed3005" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1c5c95de-8ac1-47f9-925c-cccebe518912" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_d8454275-5a2b-4585-abb0-a47e644cdc84" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1c5c95de-8ac1-47f9-925c-cccebe518912" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_d8454275-5a2b-4585-abb0-a47e644cdc84" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_d8454275-5a2b-4585-abb0-a47e644cdc84_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_d8454275-5a2b-4585-abb0-a47e644cdc84" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_d8454275-5a2b-4585-abb0-a47e644cdc84_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aad5bdfa-0f7b-4a00-a899-285e272516fa" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_d8454275-5a2b-4585-abb0-a47e644cdc84" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aad5bdfa-0f7b-4a00-a899-285e272516fa" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DistributionSystemMember_2bf5e6bd-79c8-4e31-b1d7-b875598af6e2" xlink:href="cmcsa-20221231.xsd#cmcsa_DistributionSystemMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aad5bdfa-0f7b-4a00-a899-285e272516fa" xlink:to="loc_cmcsa_DistributionSystemMember_2bf5e6bd-79c8-4e31-b1d7-b875598af6e2" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CustomerPremiseEquipmentMember_922ba674-8bcf-4326-93c1-0c2b696079ea" xlink:href="cmcsa-20221231.xsd#cmcsa_CustomerPremiseEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aad5bdfa-0f7b-4a00-a899-285e272516fa" xlink:to="loc_cmcsa_CustomerPremiseEquipmentMember_922ba674-8bcf-4326-93c1-0c2b696079ea" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BuildingsThemeParkInfrastructureAndLeaseholdImprovementsMember_03a9c302-f531-4199-a5c2-a16e7fa3d36c" xlink:href="cmcsa-20221231.xsd#cmcsa_BuildingsThemeParkInfrastructureAndLeaseholdImprovementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aad5bdfa-0f7b-4a00-a899-285e272516fa" xlink:to="loc_cmcsa_BuildingsThemeParkInfrastructureAndLeaseholdImprovementsMember_03a9c302-f531-4199-a5c2-a16e7fa3d36c" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember_af262d3c-fc6d-4325-a6c3-82d23a4b1e9a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aad5bdfa-0f7b-4a00-a899-285e272516fa" xlink:to="loc_us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember_af262d3c-fc6d-4325-a6c3-82d23a4b1e9a" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConstructionInProgressMember_124b10c7-adb0-4782-b394-6bc824bf86dd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ConstructionInProgressMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aad5bdfa-0f7b-4a00-a899-285e272516fa" xlink:to="loc_us-gaap_ConstructionInProgressMember_124b10c7-adb0-4782-b394-6bc824bf86dd" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_2f3ceb73-e188-47f5-b06e-4713a9b92a33" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LandMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_aad5bdfa-0f7b-4a00-a899-285e272516fa" xlink:to="loc_us-gaap_LandMember_2f3ceb73-e188-47f5-b06e-4713a9b92a33" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_0ebb54d8-34b5-4c65-9cd2-45196c50e8e4" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_StatementGeographicalAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_1c5c95de-8ac1-47f9-925c-cccebe518912" xlink:to="loc_srt_StatementGeographicalAxis_0ebb54d8-34b5-4c65-9cd2-45196c50e8e4" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_0ebb54d8-34b5-4c65-9cd2-45196c50e8e4_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_0ebb54d8-34b5-4c65-9cd2-45196c50e8e4" xlink:to="loc_srt_SegmentGeographicalDomain_0ebb54d8-34b5-4c65-9cd2-45196c50e8e4_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_1c10026a-e448-43c7-b709-13eed6e26ea5" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_SegmentGeographicalDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_0ebb54d8-34b5-4c65-9cd2-45196c50e8e4" xlink:to="loc_srt_SegmentGeographicalDomain_1c10026a-e448-43c7-b709-13eed6e26ea5" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_country_US_06f89aa2-beb0-4c14-9f76-a3bebc90667b" xlink:href="https://xbrl.sec.gov/country/2022/country-2022.xsd#country_US"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1c10026a-e448-43c7-b709-13eed6e26ea5" xlink:to="loc_country_US_06f89aa2-beb0-4c14-9f76-a3bebc90667b" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonUsMember_52d908c3-9ae5-41fe-ad8f-89336f232942" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_NonUsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_1c10026a-e448-43c7-b709-13eed6e26ea5" xlink:to="loc_us-gaap_NonUsMember_52d908c3-9ae5-41fe-ad8f-89336f232942" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/GoodwillandIntangibleAssetsChangeinGoodwillDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#GoodwillandIntangibleAssetsChangeinGoodwillDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/GoodwillandIntangibleAssetsChangeinGoodwillDetails" xlink:type="extended" id="i3f3adfe7561442b8b033956772eb3952_GoodwillandIntangibleAssetsChangeinGoodwillDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_69bf9145-756a-4c35-b612-ef9ad8ee619d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_dd85176c-a372-47b8-b4a6-f6430991dc7f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_69bf9145-756a-4c35-b612-ef9ad8ee619d" xlink:to="loc_us-gaap_GoodwillRollForward_dd85176c-a372-47b8-b4a6-f6430991dc7f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_a9f070b7-85f3-4577-9fc3-e40250ded2a0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_dd85176c-a372-47b8-b4a6-f6430991dc7f" xlink:to="loc_us-gaap_Goodwill_a9f070b7-85f3-4577-9fc3-e40250ded2a0" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillTransfers_1e260220-244e-4560-a231-954a2bf4cc9b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillTransfers"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_dd85176c-a372-47b8-b4a6-f6430991dc7f" xlink:to="loc_us-gaap_GoodwillTransfers_1e260220-244e-4560-a231-954a2bf4cc9b" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_9374369f-8c6a-4133-8807-1e535c630f5c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_dd85176c-a372-47b8-b4a6-f6430991dc7f" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_9374369f-8c6a-4133-8807-1e535c630f5c" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_GoodwillForeignCurrencyTranslationGainLossAndOther_e8bd5f9d-ed72-420e-959b-fbe6daa1a189" xlink:href="cmcsa-20221231.xsd#cmcsa_GoodwillForeignCurrencyTranslationGainLossAndOther"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_dd85176c-a372-47b8-b4a6-f6430991dc7f" xlink:to="loc_cmcsa_GoodwillForeignCurrencyTranslationGainLossAndOther_e8bd5f9d-ed72-420e-959b-fbe6daa1a189" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairmentLoss_bfa70613-2a0c-4f97-890b-95c9eccaecda" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillImpairmentLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_dd85176c-a372-47b8-b4a6-f6430991dc7f" xlink:to="loc_us-gaap_GoodwillImpairmentLoss_bfa70613-2a0c-4f97-890b-95c9eccaecda" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_c5d49e27-cfa0-41d3-9cb8-836478c88196" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillGross_c0e0985d-507d-4cba-8d95-925ea702630e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillGross"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_69bf9145-756a-4c35-b612-ef9ad8ee619d" xlink:to="loc_us-gaap_GoodwillGross_c0e0985d-507d-4cba-8d95-925ea702630e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_e2b8b359-8972-4842-aec6-beb19c5a1ed4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillImpairedAccumulatedImpairmentLoss"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_69bf9145-756a-4c35-b612-ef9ad8ee619d" xlink:to="loc_us-gaap_GoodwillImpairedAccumulatedImpairmentLoss_e2b8b359-8972-4842-aec6-beb19c5a1ed4" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_7b182efe-1789-40c3-8be8-b85324daf349" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_Goodwill"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_f3b4eb9d-5546-4686-8b28-4857964343af" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfGoodwillTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_69bf9145-756a-4c35-b612-ef9ad8ee619d" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_f3b4eb9d-5546-4686-8b28-4857964343af" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_2180f467-57ff-4e37-8247-44a90f6891cc" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_f3b4eb9d-5546-4686-8b28-4857964343af" xlink:to="loc_srt_ConsolidationItemsAxis_2180f467-57ff-4e37-8247-44a90f6891cc" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_2180f467-57ff-4e37-8247-44a90f6891cc_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_2180f467-57ff-4e37-8247-44a90f6891cc" xlink:to="loc_srt_ConsolidationItemsDomain_2180f467-57ff-4e37-8247-44a90f6891cc_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_4698139c-bf37-4a36-8114-8e5af5995621" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_ConsolidationItemsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_2180f467-57ff-4e37-8247-44a90f6891cc" xlink:to="loc_srt_ConsolidationItemsDomain_4698139c-bf37-4a36-8114-8e5af5995621" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_c3826936-99e8-4122-8549-58c9460be40b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_4698139c-bf37-4a36-8114-8e5af5995621" xlink:to="loc_us-gaap_OperatingSegmentsMember_c3826936-99e8-4122-8549-58c9460be40b" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateNonSegmentMember_8167470c-c328-41ac-b05e-75da1a4bb686" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CorporateNonSegmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_4698139c-bf37-4a36-8114-8e5af5995621" xlink:to="loc_us-gaap_CorporateNonSegmentMember_8167470c-c328-41ac-b05e-75da1a4bb686" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_3467dadb-0db5-42ec-b0f7-a78a9947b1b5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_f3b4eb9d-5546-4686-8b28-4857964343af" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_3467dadb-0db5-42ec-b0f7-a78a9947b1b5" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_3467dadb-0db5-42ec-b0f7-a78a9947b1b5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3467dadb-0db5-42ec-b0f7-a78a9947b1b5" xlink:to="loc_us-gaap_SegmentDomain_3467dadb-0db5-42ec-b0f7-a78a9947b1b5_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_3467dadb-0db5-42ec-b0f7-a78a9947b1b5" xlink:to="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CableCommunicationsMember_3d890fdb-10ff-40be-969d-994e271455f9" xlink:href="cmcsa-20221231.xsd#cmcsa_CableCommunicationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:to="loc_cmcsa_CableCommunicationsMember_3d890fdb-10ff-40be-969d-994e271455f9" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CableNetworksMember_8f7b1784-43f6-416c-adff-3e418369ea82" xlink:href="cmcsa-20221231.xsd#cmcsa_CableNetworksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:to="loc_cmcsa_CableNetworksMember_8f7b1784-43f6-416c-adff-3e418369ea82" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_BroadcastTelevisionMember_4a929ec6-7403-40f4-866f-2f2a6f2a73cd" xlink:href="cmcsa-20221231.xsd#cmcsa_BroadcastTelevisionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:to="loc_cmcsa_BroadcastTelevisionMember_4a929ec6-7403-40f4-866f-2f2a6f2a73cd" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_FilmedEntertainmentMember_6649a2a6-a31c-43e1-b558-92c60f623a08" xlink:href="cmcsa-20221231.xsd#cmcsa_FilmedEntertainmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:to="loc_cmcsa_FilmedEntertainmentMember_6649a2a6-a31c-43e1-b558-92c60f623a08" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_MediaMember_df570d72-ddef-4488-a24e-10aef45f91bd" xlink:href="cmcsa-20221231.xsd#cmcsa_MediaMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:to="loc_cmcsa_MediaMember_df570d72-ddef-4488-a24e-10aef45f91bd" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_StudiosMember_3af5691b-cfb6-4d2e-8578-7385c3e0c552" xlink:href="cmcsa-20221231.xsd#cmcsa_StudiosMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:to="loc_cmcsa_StudiosMember_3af5691b-cfb6-4d2e-8578-7385c3e0c552" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ThemeParksMember_245e6efe-c7b4-41eb-aef2-a716dd3a6b17" xlink:href="cmcsa-20221231.xsd#cmcsa_ThemeParksMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:to="loc_cmcsa_ThemeParksMember_245e6efe-c7b4-41eb-aef2-a716dd3a6b17" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_SkyLimitedMember_956f22a5-294c-45c2-b806-a98e0d3ad126" xlink:href="cmcsa-20221231.xsd#cmcsa_SkyLimitedMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_bdaaa5e8-cdf2-4a5e-8e20-65f74da0d1cb" xlink:to="loc_cmcsa_SkyLimitedMember_956f22a5-294c-45c2-b806-a98e0d3ad126" xlink:type="arc" order="7"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/GoodwillandIntangibleAssetsIntangibleAssetsDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#GoodwillandIntangibleAssetsIntangibleAssetsDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/GoodwillandIntangibleAssetsIntangibleAssetsDetails" xlink:type="extended" id="i61ce9c15dab74bddb54b29beaf83d2f0_GoodwillandIntangibleAssetsIntangibleAssetsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_42e09495-5ebc-4a31-b009-a0a3c44957e5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_a1167445-a560-44fb-b66c-d2c7c615dd2b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_42e09495-5ebc-4a31-b009-a0a3c44957e5" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_a1167445-a560-44fb-b66c-d2c7c615dd2b" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_bc72a26d-9b68-40c7-8b27-1faef0a1ffe1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassLineItems_42e09495-5ebc-4a31-b009-a0a3c44957e5" xlink:to="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_bc72a26d-9b68-40c7-8b27-1faef0a1ffe1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_21a5854c-84ea-4fc2-aad0-2398b2d4b865" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfIndefiniteLivedIntangibleAssetsTable_bc72a26d-9b68-40c7-8b27-1faef0a1ffe1" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_21a5854c-84ea-4fc2-aad0-2398b2d4b865" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_21a5854c-84ea-4fc2-aad0-2398b2d4b865_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_21a5854c-84ea-4fc2-aad0-2398b2d4b865" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_21a5854c-84ea-4fc2-aad0-2398b2d4b865_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_d985a7b0-2d7b-4836-b8eb-885a5c907984" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_21a5854c-84ea-4fc2-aad0-2398b2d4b865" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_d985a7b0-2d7b-4836-b8eb-885a5c907984" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FranchiseRightsMember_9861f3a6-0ba8-4462-bbc4-7556323ece73" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FranchiseRightsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_d985a7b0-2d7b-4836-b8eb-885a5c907984" xlink:to="loc_us-gaap_FranchiseRightsMember_9861f3a6-0ba8-4462-bbc4-7556323ece73" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LicensingAgreementsMember_9139c98f-0b6f-406b-aaa5-b2e308348550" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LicensingAgreementsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_d985a7b0-2d7b-4836-b8eb-885a5c907984" xlink:to="loc_us-gaap_LicensingAgreementsMember_9139c98f-0b6f-406b-aaa5-b2e308348550" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3ed96f5d-a886-44f4-bb1c-02ecda6323a1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_ac5648af-605c-4679-a6c1-75c3d87a5de2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3ed96f5d-a886-44f4-bb1c-02ecda6323a1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_ac5648af-605c-4679-a6c1-75c3d87a5de2" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_e11f58fb-d412-4da1-8a48-c1c07d7c584f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3ed96f5d-a886-44f4-bb1c-02ecda6323a1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_e11f58fb-d412-4da1-8a48-c1c07d7c584f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_5ac7b75d-2c9c-4997-b4e7-45309f5d3a67" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3ed96f5d-a886-44f4-bb1c-02ecda6323a1" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_5ac7b75d-2c9c-4997-b4e7-45309f5d3a67" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_f9a08436-c91a-486d-8a99-450aa0102a13" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_3ed96f5d-a886-44f4-bb1c-02ecda6323a1" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_f9a08436-c91a-486d-8a99-450aa0102a13" xlink:type="arc" order="2" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_f6135b36-bd58-4ccf-9be7-417c93ecf5bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_f9a08436-c91a-486d-8a99-450aa0102a13" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_f6135b36-bd58-4ccf-9be7-417c93ecf5bd" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f6135b36-bd58-4ccf-9be7-417c93ecf5bd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_f6135b36-bd58-4ccf-9be7-417c93ecf5bd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f6135b36-bd58-4ccf-9be7-417c93ecf5bd_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4e3532e2-4705-46a8-b25e-d89d08b72ef7" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_f6135b36-bd58-4ccf-9be7-417c93ecf5bd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4e3532e2-4705-46a8-b25e-d89d08b72ef7" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_d3584860-e321-4de4-8845-a5adc6170367" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CustomerRelationshipsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4e3532e2-4705-46a8-b25e-d89d08b72ef7" xlink:to="loc_us-gaap_CustomerRelationshipsMember_d3584860-e321-4de4-8845-a5adc6170367" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_ed782b65-ec08-4a66-92e7-54a760be731a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4e3532e2-4705-46a8-b25e-d89d08b72ef7" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_ed782b65-ec08-4a66-92e7-54a760be731a" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_8c350a0b-b161-48d2-ba69-d93378f6d2fe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherIntangibleAssetsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4e3532e2-4705-46a8-b25e-d89d08b72ef7" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_8c350a0b-b161-48d2-ba69-d93378f6d2fe" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/GoodwillandIntangibleAssetsNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#GoodwillandIntangibleAssetsNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/GoodwillandIntangibleAssetsNarrativeDetails" xlink:type="extended" id="ia98f418206fa42af99573d675d858e9f_GoodwillandIntangibleAssetsNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_849fa03b-56e2-4e0f-82b3-725615a40fbd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentReportingInformationLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NumberOfDivisions_98fbc63d-9e8c-48df-b09c-4b18c559e07a" xlink:href="cmcsa-20221231.xsd#cmcsa_NumberOfDivisions"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_849fa03b-56e2-4e0f-82b3-725615a40fbd" xlink:to="loc_cmcsa_NumberOfDivisions_98fbc63d-9e8c-48df-b09c-4b18c559e07a" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_f95e85d0-2ca6-4640-ac33-026c233119df" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_849fa03b-56e2-4e0f-82b3-725615a40fbd" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_f95e85d0-2ca6-4640-ac33-026c233119df" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_e69df701-183e-434e-a466-a39be8af1394" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_849fa03b-56e2-4e0f-82b3-725615a40fbd" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_e69df701-183e-434e-a466-a39be8af1394" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetFiniteLivedStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_4fa85eac-fd0c-40dd-9fbc-7c5d8873d924" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ImpairmentOfIntangibleAssetFiniteLivedStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_849fa03b-56e2-4e0f-82b3-725615a40fbd" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetFiniteLivedStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_4fa85eac-fd0c-40dd-9fbc-7c5d8873d924" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b308a6a6-0e36-4b65-a56b-cc1894bb78d6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_849fa03b-56e2-4e0f-82b3-725615a40fbd" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b308a6a6-0e36-4b65-a56b-cc1894bb78d6" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_a9398f23-0f3d-49a1-935e-79e5cd88c501" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementBusinessSegmentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b308a6a6-0e36-4b65-a56b-cc1894bb78d6" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_a9398f23-0f3d-49a1-935e-79e5cd88c501" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a9398f23-0f3d-49a1-935e-79e5cd88c501_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_a9398f23-0f3d-49a1-935e-79e5cd88c501" xlink:to="loc_us-gaap_SegmentDomain_a9398f23-0f3d-49a1-935e-79e5cd88c501_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_d6b5cbe3-da4d-480d-9d97-c717ae0f9f56" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SegmentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_a9398f23-0f3d-49a1-935e-79e5cd88c501" xlink:to="loc_us-gaap_SegmentDomain_d6b5cbe3-da4d-480d-9d97-c717ae0f9f56" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CableCommunicationsMember_1b5b50c5-65af-441f-92eb-81ce9ac9b8dc" xlink:href="cmcsa-20221231.xsd#cmcsa_CableCommunicationsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_d6b5cbe3-da4d-480d-9d97-c717ae0f9f56" xlink:to="loc_cmcsa_CableCommunicationsMember_1b5b50c5-65af-441f-92eb-81ce9ac9b8dc" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_SkyLimitedSegmentsMember_000e815c-61ca-4a86-8154-15a5918c06f5" xlink:href="cmcsa-20221231.xsd#cmcsa_SkyLimitedSegmentsMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_d6b5cbe3-da4d-480d-9d97-c717ae0f9f56" xlink:to="loc_cmcsa_SkyLimitedSegmentsMember_000e815c-61ca-4a86-8154-15a5918c06f5" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_89c7cb73-247b-4abd-8305-b7de994e0207" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_b308a6a6-0e36-4b65-a56b-cc1894bb78d6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_89c7cb73-247b-4abd-8305-b7de994e0207" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_89c7cb73-247b-4abd-8305-b7de994e0207_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_89c7cb73-247b-4abd-8305-b7de994e0207" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_89c7cb73-247b-4abd-8305-b7de994e0207_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_87049f6c-248d-457f-b0c0-705333b58606" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_89c7cb73-247b-4abd-8305-b7de994e0207" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_87049f6c-248d-457f-b0c0-705333b58606" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_5133aee1-7cad-4d40-994b-fd32236fa859" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_87049f6c-248d-457f-b0c0-705333b58606" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_5133aee1-7cad-4d40-994b-fd32236fa859" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/EmployeeBenefitPlansDeferredCompensationPlansDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#EmployeeBenefitPlansDeferredCompensationPlansDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/EmployeeBenefitPlansDeferredCompensationPlansDetails" xlink:type="extended" id="i6551e05e63d446538f9c724296dcdd35_EmployeeBenefitPlansDeferredCompensationPlansDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aa09865c-30c7-4d65-b2e8-16db8e0cc152" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DeferredCompensationPlansBenefitObligation_47943157-8cd9-4e3a-ac56-004a5ac05f8c" xlink:href="cmcsa-20221231.xsd#cmcsa_DeferredCompensationPlansBenefitObligation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aa09865c-30c7-4d65-b2e8-16db8e0cc152" xlink:to="loc_cmcsa_DeferredCompensationPlansBenefitObligation_47943157-8cd9-4e3a-ac56-004a5ac05f8c" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DeferredCompensationPlansInterestCost_fc23eac6-349a-4baa-b87e-e4877e820518" xlink:href="cmcsa-20221231.xsd#cmcsa_DeferredCompensationPlansInterestCost"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aa09865c-30c7-4d65-b2e8-16db8e0cc152" xlink:to="loc_cmcsa_DeferredCompensationPlansInterestCost_fc23eac6-349a-4baa-b87e-e4877e820518" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_771e0764-076f-4dbb-98b1-0be7ed9fe4cb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_aa09865c-30c7-4d65-b2e8-16db8e0cc152" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_771e0764-076f-4dbb-98b1-0be7ed9fe4cb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualAxis_d5018f5e-9eb0-4cdc-833e-71fe19b8758d" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_771e0764-076f-4dbb-98b1-0be7ed9fe4cb" xlink:to="loc_srt_TitleOfIndividualAxis_d5018f5e-9eb0-4cdc-833e-71fe19b8758d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_d5018f5e-9eb0-4cdc-833e-71fe19b8758d_default" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_TitleOfIndividualAxis_d5018f5e-9eb0-4cdc-833e-71fe19b8758d" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_d5018f5e-9eb0-4cdc-833e-71fe19b8758d_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_e370d74e-6e21-4540-a703-d612f27920da" xlink:href="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_TitleOfIndividualAxis_d5018f5e-9eb0-4cdc-833e-71fe19b8758d" xlink:to="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_e370d74e-6e21-4540-a703-d612f27920da" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_DeferredCompensationPlansMember_7ab0e386-28e0-4599-aff1-cc37742cd343" xlink:href="cmcsa-20221231.xsd#cmcsa_DeferredCompensationPlansMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_TitleOfIndividualWithRelationshipToEntityDomain_e370d74e-6e21-4540-a703-d612f27920da" xlink:to="loc_cmcsa_DeferredCompensationPlansMember_7ab0e386-28e0-4599-aff1-cc37742cd343" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/EquityNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#EquityNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/EquityNarrativeDetails" xlink:type="extended" id="i1914b89e71454bc3b0e95ffee2217bf1_EquityNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_863a172a-38b7-4ab1-8f05-0032c216aee3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CommonStockVotingPower_445eb87e-f0ec-4de5-a965-63dde85d2787" xlink:href="cmcsa-20221231.xsd#cmcsa_CommonStockVotingPower"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_863a172a-38b7-4ab1-8f05-0032c216aee3" xlink:to="loc_cmcsa_CommonStockVotingPower_445eb87e-f0ec-4de5-a965-63dde85d2787" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NumberOfVotesEntitledOfEachClassBCommonStock_6e75161d-b851-4eb1-be4f-b7cb21089fd2" xlink:href="cmcsa-20221231.xsd#cmcsa_NumberOfVotesEntitledOfEachClassBCommonStock"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_863a172a-38b7-4ab1-8f05-0032c216aee3" xlink:to="loc_cmcsa_NumberOfVotesEntitledOfEachClassBCommonStock_6e75161d-b851-4eb1-be4f-b7cb21089fd2" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_3cf7ce5e-7941-4f1a-a5c9-288ff8fd3002" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfStockByClassTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_863a172a-38b7-4ab1-8f05-0032c216aee3" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_3cf7ce5e-7941-4f1a-a5c9-288ff8fd3002" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_5243094b-3498-4f31-9e56-28b324f822d2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_3cf7ce5e-7941-4f1a-a5c9-288ff8fd3002" xlink:to="loc_us-gaap_StatementClassOfStockAxis_5243094b-3498-4f31-9e56-28b324f822d2" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_5243094b-3498-4f31-9e56-28b324f822d2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_5243094b-3498-4f31-9e56-28b324f822d2" xlink:to="loc_us-gaap_ClassOfStockDomain_5243094b-3498-4f31-9e56-28b324f822d2_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_b49b2153-5457-4cda-b0d1-b0445c956eee" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_5243094b-3498-4f31-9e56-28b324f822d2" xlink:to="loc_us-gaap_ClassOfStockDomain_b49b2153-5457-4cda-b0d1-b0445c956eee" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_acd38c5d-f02f-4440-8ac0-bbe2851554a2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_b49b2153-5457-4cda-b0d1-b0445c956eee" xlink:to="loc_us-gaap_CommonClassAMember_acd38c5d-f02f-4440-8ac0-bbe2851554a2" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_6de054c8-cfff-43a9-9d0b-902761127d26" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_b49b2153-5457-4cda-b0d1-b0445c956eee" xlink:to="loc_us-gaap_CommonClassBMember_6de054c8-cfff-43a9-9d0b-902761127d26" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/EquityChangesinCommonStockDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#EquityChangesinCommonStockDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/EquityChangesinCommonStockDetails" xlink:type="extended" id="i25d9ce0f6d014556933978cf22ff8dc0_EquityChangesinCommonStockDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_822f1548-6403-4a5f-8a7c-292b7fdc7f0a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_40cb09e3-01f0-4ade-91a5-6816c9e8b79f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_822f1548-6403-4a5f-8a7c-292b7fdc7f0a" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_40cb09e3-01f0-4ade-91a5-6816c9e8b79f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_05f92586-16c6-4350-9fda-668a4ed8bb4b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesOutstanding"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_40cb09e3-01f0-4ade-91a5-6816c9e8b79f" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_05f92586-16c6-4350-9fda-668a4ed8bb4b" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_4836c923-9ce9-4e80-b9ed-f5ac1c0999a0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_40cb09e3-01f0-4ade-91a5-6816c9e8b79f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_4836c923-9ce9-4e80-b9ed-f5ac1c0999a0" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_7b2a608e-7fb4-4d86-bb11-aef7e812c815" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockRepurchasedAndRetiredDuringPeriodShares"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_40cb09e3-01f0-4ade-91a5-6816c9e8b79f" xlink:to="loc_us-gaap_StockRepurchasedAndRetiredDuringPeriodShares_7b2a608e-7fb4-4d86-bb11-aef7e812c815" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_2fd3c73f-ac2e-410b-9507-f01e9946836c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_40cb09e3-01f0-4ade-91a5-6816c9e8b79f" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans_2fd3c73f-ac2e-410b-9507-f01e9946836c" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_5778dbd2-4757-488d-ab38-e14d644a970a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonStockSharesOutstanding"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_2835886f-86d8-4291-b87e-c13ebf6e86f2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfStockByClassTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_822f1548-6403-4a5f-8a7c-292b7fdc7f0a" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_2835886f-86d8-4291-b87e-c13ebf6e86f2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_c56f97fd-0301-4506-9ffc-04a6b7379be8" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementClassOfStockAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_2835886f-86d8-4291-b87e-c13ebf6e86f2" xlink:to="loc_us-gaap_StatementClassOfStockAxis_c56f97fd-0301-4506-9ffc-04a6b7379be8" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_c56f97fd-0301-4506-9ffc-04a6b7379be8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c56f97fd-0301-4506-9ffc-04a6b7379be8" xlink:to="loc_us-gaap_ClassOfStockDomain_c56f97fd-0301-4506-9ffc-04a6b7379be8_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_f5dfa1d9-afa3-4cca-976c-772486285215" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ClassOfStockDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_c56f97fd-0301-4506-9ffc-04a6b7379be8" xlink:to="loc_us-gaap_ClassOfStockDomain_f5dfa1d9-afa3-4cca-976c-772486285215" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassAMember_c48a0e35-7e38-4ce9-8c3e-fabcd58eb86d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassAMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_f5dfa1d9-afa3-4cca-976c-772486285215" xlink:to="loc_us-gaap_CommonClassAMember_c48a0e35-7e38-4ce9-8c3e-fabcd58eb86d" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonClassBMember_f6f113c5-da00-4326-97d1-31ad4c894ff3" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_CommonClassBMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_f5dfa1d9-afa3-4cca-976c-772486285215" xlink:to="loc_us-gaap_CommonClassBMember_f6f113c5-da00-4326-97d1-31ad4c894ff3" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended" id="ic9043e5399914d678fc9e2c6796e90a9_EquityComponentsofAccumulatedOtherComprehensiveIncomeLossDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_829f553e-437c-4c16-b164-52c1b72bed72" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_dfb400a4-2947-4aea-abee-ebf0e58b8761" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_829f553e-437c-4c16-b164-52c1b72bed72" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_dfb400a4-2947-4aea-abee-ebf0e58b8761" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0b516aff-7b57-4a4a-be93-3d85b97ffb7d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_829f553e-437c-4c16-b164-52c1b72bed72" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0b516aff-7b57-4a4a-be93-3d85b97ffb7d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_38946ae5-46c3-4559-8127-5d91f22adb1a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_StatementEquityComponentsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0b516aff-7b57-4a4a-be93-3d85b97ffb7d" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_38946ae5-46c3-4559-8127-5d91f22adb1a" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_38946ae5-46c3-4559-8127-5d91f22adb1a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_38946ae5-46c3-4559-8127-5d91f22adb1a" xlink:to="loc_us-gaap_EquityComponentDomain_38946ae5-46c3-4559-8127-5d91f22adb1a_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_9bb760de-8445-402a-9c37-546147117ff5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EquityComponentDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_38946ae5-46c3-4559-8127-5d91f22adb1a" xlink:to="loc_us-gaap_EquityComponentDomain_9bb760de-8445-402a-9c37-546147117ff5" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_a0213760-0a59-4aea-96dc-a05049c73d3b" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_9bb760de-8445-402a-9c37-546147117ff5" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_a0213760-0a59-4aea-96dc-a05049c73d3b" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_50ddc593-737e-4e30-aa7e-9f0fd70cc8c2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_9bb760de-8445-402a-9c37-546147117ff5" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_50ddc593-737e-4e30-aa7e-9f0fd70cc8c2" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_06624ff5-fc3c-4503-9d94-e0134ae7a4bd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_9bb760de-8445-402a-9c37-546147117ff5" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_06624ff5-fc3c-4503-9d94-e0134ae7a4bd" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_44c461ae-efe4-490a-a925-361b34588dc2" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_9bb760de-8445-402a-9c37-546147117ff5" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_44c461ae-efe4-490a-a925-361b34588dc2" xlink:type="arc" order="3"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/ShareBasedCompensationRecognizedShareBasedCompensationExpenseDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#ShareBasedCompensationRecognizedShareBasedCompensationExpenseDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/ShareBasedCompensationRecognizedShareBasedCompensationExpenseDetails" xlink:type="extended" id="i42083f5fa292442fa18d245e576deaae_ShareBasedCompensationRecognizedShareBasedCompensationExpenseDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_389c5348-ed4f-40c9-a6ea-fb2737caca22" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_c0a93202-b547-44a1-86c2-6c9ca9e2222f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_389c5348-ed4f-40c9-a6ea-fb2737caca22" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_c0a93202-b547-44a1-86c2-6c9ca9e2222f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0497067b-d838-4065-b7ae-631690cd5477" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_389c5348-ed4f-40c9-a6ea-fb2737caca22" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0497067b-d838-4065-b7ae-631690cd5477" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_86d9a41c-edd5-4782-a1f3-4787fe87b119" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0497067b-d838-4065-b7ae-631690cd5477" xlink:to="loc_us-gaap_AwardTypeAxis_86d9a41c-edd5-4782-a1f3-4787fe87b119" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_86d9a41c-edd5-4782-a1f3-4787fe87b119_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_86d9a41c-edd5-4782-a1f3-4787fe87b119" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_86d9a41c-edd5-4782-a1f3-4787fe87b119_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_369f05a2-941a-4efd-b0a0-5a2175e5936e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_86d9a41c-edd5-4782-a1f3-4787fe87b119" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_369f05a2-941a-4efd-b0a0-5a2175e5936e" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_5543f2b5-7873-4740-911d-b08cdaa0cefe" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_369f05a2-941a-4efd-b0a0-5a2175e5936e" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_5543f2b5-7873-4740-911d-b08cdaa0cefe" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_dbfd95f8-6535-42a7-ad04-e9f034941912" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_369f05a2-941a-4efd-b0a0-5a2175e5936e" xlink:to="loc_us-gaap_EmployeeStockOptionMember_dbfd95f8-6535-42a7-ad04-e9f034941912" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_d4c23734-b968-484b-9f9d-b09fde486bbf" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_369f05a2-941a-4efd-b0a0-5a2175e5936e" xlink:to="loc_us-gaap_EmployeeStockMember_d4c23734-b968-484b-9f9d-b09fde486bbf" xlink:type="arc" order="2"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/ShareBasedCompensationNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#ShareBasedCompensationNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/ShareBasedCompensationNarrativeDetails" xlink:type="extended" id="i68eae3dfa0774c6f9364cdd0bd7c25f7_ShareBasedCompensationNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d4ca726d-8c7a-4dda-962a-6756069bf4dc" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_33c9c8a9-925d-4fa2-8b1f-d1cb076875c6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d4ca726d-8c7a-4dda-962a-6756069bf4dc" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_33c9c8a9-925d-4fa2-8b1f-d1cb076875c6" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_67f974ee-5032-474e-84df-2c676e4289eb" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d4ca726d-8c7a-4dda-962a-6756069bf4dc" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_67f974ee-5032-474e-84df-2c676e4289eb" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_6ee4143a-5d61-49b9-8c15-12ade480fc8c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d4ca726d-8c7a-4dda-962a-6756069bf4dc" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_6ee4143a-5d61-49b9-8c15-12ade480fc8c" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_19e17b43-0557-48c3-80b8-b94c538285c4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d4ca726d-8c7a-4dda-962a-6756069bf4dc" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_19e17b43-0557-48c3-80b8-b94c538285c4" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_8d1391e6-54d3-4e8f-addd-d93ad6f041fd" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d4ca726d-8c7a-4dda-962a-6756069bf4dc" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_8d1391e6-54d3-4e8f-addd-d93ad6f041fd" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0ab36282-b2b5-4e4b-a090-cd4b6796c8df" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d4ca726d-8c7a-4dda-962a-6756069bf4dc" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0ab36282-b2b5-4e4b-a090-cd4b6796c8df" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_2adb36b3-200f-4679-808a-f6f97952d1ea" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_0ab36282-b2b5-4e4b-a090-cd4b6796c8df" xlink:to="loc_us-gaap_AwardTypeAxis_2adb36b3-200f-4679-808a-f6f97952d1ea" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2adb36b3-200f-4679-808a-f6f97952d1ea_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_2adb36b3-200f-4679-808a-f6f97952d1ea" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2adb36b3-200f-4679-808a-f6f97952d1ea_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a186134-9357-4211-aa30-c6b5e76cd87d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_2adb36b3-200f-4679-808a-f6f97952d1ea" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a186134-9357-4211-aa30-c6b5e76cd87d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_7f0c0486-189d-47b6-83a2-331ed8939821" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a186134-9357-4211-aa30-c6b5e76cd87d" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_7f0c0486-189d-47b6-83a2-331ed8939821" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_2f7a4c75-032e-4230-adb9-e47ef412295c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_EmployeeStockOptionMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_2a186134-9357-4211-aa30-c6b5e76cd87d" xlink:to="loc_us-gaap_EmployeeStockOptionMember_2f7a4c75-032e-4230-adb9-e47ef412295c" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/ShareBasedCompensationStockOptionsandRestrictedShareUnitsDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#ShareBasedCompensationStockOptionsandRestrictedShareUnitsDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/ShareBasedCompensationStockOptionsandRestrictedShareUnitsDetails" xlink:type="extended" id="i5122adac631f419fb777634cf691b2b5_ShareBasedCompensationStockOptionsandRestrictedShareUnitsDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c7351e02-75a8-47b2-8d4f-ebf19dcff856" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_283e436a-6053-4323-ae52-0e6795b61040" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c7351e02-75a8-47b2-8d4f-ebf19dcff856" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_283e436a-6053-4323-ae52-0e6795b61040" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_225969e5-88fc-4c06-89ec-7b61cfe03d38" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c7351e02-75a8-47b2-8d4f-ebf19dcff856" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_225969e5-88fc-4c06-89ec-7b61cfe03d38" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_d5824134-a9ae-44ec-94a3-304785863be6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c7351e02-75a8-47b2-8d4f-ebf19dcff856" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_d5824134-a9ae-44ec-94a3-304785863be6" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_c8ce6926-d2e6-4393-a6aa-e47d83ea11b9" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c7351e02-75a8-47b2-8d4f-ebf19dcff856" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_c8ce6926-d2e6-4393-a6aa-e47d83ea11b9" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_8eec1bf6-06f6-4cf0-b273-a0d1ce758c2c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c7351e02-75a8-47b2-8d4f-ebf19dcff856" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_8eec1bf6-06f6-4cf0-b273-a0d1ce758c2c" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_5579e94d-f406-4097-a338-dd44b4c353e5" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c7351e02-75a8-47b2-8d4f-ebf19dcff856" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_5579e94d-f406-4097-a338-dd44b4c353e5" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8abb8f38-cf2a-40ce-98ca-cecc992e81f1" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c7351e02-75a8-47b2-8d4f-ebf19dcff856" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_8abb8f38-cf2a-40ce-98ca-cecc992e81f1" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c8fcc177-2c70-4ee1-b6cb-1482067e3f81" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_c7351e02-75a8-47b2-8d4f-ebf19dcff856" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c8fcc177-2c70-4ee1-b6cb-1482067e3f81" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_1ff9d841-cde1-4299-aaca-310ec0cbd278" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_c8fcc177-2c70-4ee1-b6cb-1482067e3f81" xlink:to="loc_us-gaap_AwardTypeAxis_1ff9d841-cde1-4299-aaca-310ec0cbd278" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1ff9d841-cde1-4299-aaca-310ec0cbd278_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_1ff9d841-cde1-4299-aaca-310ec0cbd278" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_1ff9d841-cde1-4299-aaca-310ec0cbd278_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_edbf68a0-08c1-4a2e-9569-bd9345eaa9c4" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_1ff9d841-cde1-4299-aaca-310ec0cbd278" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_edbf68a0-08c1-4a2e-9569-bd9345eaa9c4" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_9d61336d-1f29-429f-ab0e-f23aff197c2e" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_edbf68a0-08c1-4a2e-9569-bd9345eaa9c4" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_9d61336d-1f29-429f-ab0e-f23aff197c2e" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/ShareBasedCompensationRestrictedShareUnitsandStockOptionFairValueDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#ShareBasedCompensationRestrictedShareUnitsandStockOptionFairValueDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/ShareBasedCompensationRestrictedShareUnitsandStockOptionFairValueDetails" xlink:type="extended" id="i35aa1a1c4410493c9685249aaad0bfb1_ShareBasedCompensationRestrictedShareUnitsandStockOptionFairValueDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4f3fcfc-9ec5-4dc3-acad-1a3d45d34cda" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_77e639d1-12e4-4ae0-920c-2424187fd38f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4f3fcfc-9ec5-4dc3-acad-1a3d45d34cda" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_77e639d1-12e4-4ae0-920c-2424187fd38f" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_c42260bb-96ea-4dac-8d1a-22757ba2918d" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4f3fcfc-9ec5-4dc3-acad-1a3d45d34cda" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_c42260bb-96ea-4dac-8d1a-22757ba2918d" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_9e88d9bd-fd44-4dfb-9391-1708d5003cf6" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4f3fcfc-9ec5-4dc3-acad-1a3d45d34cda" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_9e88d9bd-fd44-4dfb-9391-1708d5003cf6" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1baf0735-1be7-4ade-8e3b-80667b3553b0" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_9e88d9bd-fd44-4dfb-9391-1708d5003cf6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_1baf0735-1be7-4ade-8e3b-80667b3553b0" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_604b688f-5152-415b-9a41-aa539577161c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_9e88d9bd-fd44-4dfb-9391-1708d5003cf6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_604b688f-5152-415b-9a41-aa539577161c" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_658c1d7a-3ee1-4e3c-b786-534319789260" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_9e88d9bd-fd44-4dfb-9391-1708d5003cf6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_658c1d7a-3ee1-4e3c-b786-534319789260" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_09fa346b-a99c-4bcc-b597-0d97386833ac" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsAndMethodologyAbstract_9e88d9bd-fd44-4dfb-9391-1708d5003cf6" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_09fa346b-a99c-4bcc-b597-0d97386833ac" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_48bb8abd-88d9-4205-98aa-28e621970c98" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a4f3fcfc-9ec5-4dc3-acad-1a3d45d34cda" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_48bb8abd-88d9-4205-98aa-28e621970c98" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_511d47ac-bc72-476f-acb9-49702e3b0802" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AwardTypeAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_48bb8abd-88d9-4205-98aa-28e621970c98" xlink:to="loc_us-gaap_AwardTypeAxis_511d47ac-bc72-476f-acb9-49702e3b0802" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_511d47ac-bc72-476f-acb9-49702e3b0802_default" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_511d47ac-bc72-476f-acb9-49702e3b0802" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_511d47ac-bc72-476f-acb9-49702e3b0802_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8dd776da-3c7c-4c15-8fff-96ae5098cd5c" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_511d47ac-bc72-476f-acb9-49702e3b0802" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8dd776da-3c7c-4c15-8fff-96ae5098cd5c" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_20d7fbd6-7d49-473e-888a-a2877373886a" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RestrictedStockUnitsRSUMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8dd776da-3c7c-4c15-8fff-96ae5098cd5c" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_20d7fbd6-7d49-473e-888a-a2877373886a" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://www.comcast.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="simple" xlink:href="cmcsa-20221231.xsd#CommitmentsandContingenciesNarrativeDetails"/> |
| <link:definitionLink xlink:role="http://www.comcast.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="extended" id="i4f982037066b48e792880465fdc66b76_CommitmentsandContingenciesNarrativeDetails"> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:href="cmcsa-20221231.xsd#cmcsa_CommitmentAndContingenciesLineItems"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_OperatingLeaseExpenseInclusiveOfShortTermAndVariableLeaseExpenses_0543dfcd-9108-4e91-af43-0fb8637a9306" xlink:href="cmcsa-20221231.xsd#cmcsa_OperatingLeaseExpenseInclusiveOfShortTermAndVariableLeaseExpenses"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:to="loc_cmcsa_OperatingLeaseExpenseInclusiveOfShortTermAndVariableLeaseExpenses_0543dfcd-9108-4e91-af43-0fb8637a9306" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_890b16a9-e2bd-4190-ade1-65bd62e0e594" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_890b16a9-e2bd-4190-ade1-65bd62e0e594" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_2e02f3e3-fd73-4455-8e2e-547de823ba02" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_2e02f3e3-fd73-4455-8e2e-547de823ba02" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeasePayments_5d9835cc-fa19-4347-a6ca-073b6722906f" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OperatingLeasePayments"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:to="loc_us-gaap_OperatingLeasePayments_5d9835cc-fa19-4347-a6ca-073b6722906f" xlink:type="arc" order="3"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_8a79ad7e-6158-4900-8b35-7b05ed216229" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability_8a79ad7e-6158-4900-8b35-7b05ed216229" xlink:type="arc" order="4"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CarryingValueOfContractualObligation_76d49200-3765-473c-9d5b-56aa8517ff63" xlink:href="cmcsa-20221231.xsd#cmcsa_CarryingValueOfContractualObligation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:to="loc_cmcsa_CarryingValueOfContractualObligation_76d49200-3765-473c-9d5b-56aa8517ff63" xlink:type="arc" order="5"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ContractualValueOfAPotentialFutureObligation_95055134-1a24-4a8b-9a84-db72183be07c" xlink:href="cmcsa-20221231.xsd#cmcsa_ContractualValueOfAPotentialFutureObligation"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:to="loc_cmcsa_ContractualValueOfAPotentialFutureObligation_95055134-1a24-4a8b-9a84-db72183be07c" xlink:type="arc" order="6"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_PaymentsForRepurchaseOfRedeemableSubsidiaryPreferredStock_5ce156dd-aa80-4fa1-b8d0-4ec22deeffd2" xlink:href="cmcsa-20221231.xsd#cmcsa_PaymentsForRepurchaseOfRedeemableSubsidiaryPreferredStock"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:to="loc_cmcsa_PaymentsForRepurchaseOfRedeemableSubsidiaryPreferredStock_5ce156dd-aa80-4fa1-b8d0-4ec22deeffd2" xlink:type="arc" order="7"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_CommitmentAndContingenciesTable_567b33cc-a90d-4374-aee1-b7f19a7035c1" xlink:href="cmcsa-20221231.xsd#cmcsa_CommitmentAndContingenciesTable"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_cmcsa_CommitmentAndContingenciesLineItems_26c5d48c-944f-481b-b3a7-d6f797ec4c05" xlink:to="loc_cmcsa_CommitmentAndContingenciesTable_567b33cc-a90d-4374-aee1-b7f19a7035c1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_45b5361e-daf8-4731-b04b-43d8ddff2d9f" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_LegalEntityAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_cmcsa_CommitmentAndContingenciesTable_567b33cc-a90d-4374-aee1-b7f19a7035c1" xlink:to="loc_dei_LegalEntityAxis_45b5361e-daf8-4731-b04b-43d8ddff2d9f" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_45b5361e-daf8-4731-b04b-43d8ddff2d9f_default" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_45b5361e-daf8-4731-b04b-43d8ddff2d9f" xlink:to="loc_dei_EntityDomain_45b5361e-daf8-4731-b04b-43d8ddff2d9f_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_2ace7c33-13c7-4c2c-91e3-757c68c13c6b" xlink:href="https://xbrl.sec.gov/dei/2022/dei-2022.xsd#dei_EntityDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_45b5361e-daf8-4731-b04b-43d8ddff2d9f" xlink:to="loc_dei_EntityDomain_2ace7c33-13c7-4c2c-91e3-757c68c13c6b" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_NbcuniversalEnterpriseMember_b9252354-c18f-406d-9a0c-3a3dd750d328" xlink:href="cmcsa-20221231.xsd#cmcsa_NbcuniversalEnterpriseMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_2ace7c33-13c7-4c2c-91e3-757c68c13c6b" xlink:to="loc_cmcsa_NbcuniversalEnterpriseMember_b9252354-c18f-406d-9a0c-3a3dd750d328" xlink:type="arc" order="0"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_LeaseArrangementsAxis_e24f18a3-9cab-4ee1-99b6-b9d4251242f0" xlink:href="cmcsa-20221231.xsd#cmcsa_LeaseArrangementsAxis"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_cmcsa_CommitmentAndContingenciesTable_567b33cc-a90d-4374-aee1-b7f19a7035c1" xlink:to="loc_cmcsa_LeaseArrangementsAxis_e24f18a3-9cab-4ee1-99b6-b9d4251242f0" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_LeaseArrangementsDomain_e24f18a3-9cab-4ee1-99b6-b9d4251242f0_default" xlink:href="cmcsa-20221231.xsd#cmcsa_LeaseArrangementsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_cmcsa_LeaseArrangementsAxis_e24f18a3-9cab-4ee1-99b6-b9d4251242f0" xlink:to="loc_cmcsa_LeaseArrangementsDomain_e24f18a3-9cab-4ee1-99b6-b9d4251242f0_default" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_LeaseArrangementsDomain_ef7903ce-ae73-4ad3-b22e-c7d979c77453" xlink:href="cmcsa-20221231.xsd#cmcsa_LeaseArrangementsDomain"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_cmcsa_LeaseArrangementsAxis_e24f18a3-9cab-4ee1-99b6-b9d4251242f0" xlink:to="loc_cmcsa_LeaseArrangementsDomain_ef7903ce-ae73-4ad3-b22e-c7d979c77453" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_UniversalBeijingResortMember_eaad5267-60ad-4a34-9899-a258608f3bbb" xlink:href="cmcsa-20221231.xsd#cmcsa_UniversalBeijingResortMember"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_cmcsa_LeaseArrangementsDomain_ef7903ce-ae73-4ad3-b22e-c7d979c77453" xlink:to="loc_cmcsa_UniversalBeijingResortMember_eaad5267-60ad-4a34-9899-a258608f3bbb" xlink:type="arc" order="0"/> |
| | </link:definitionLink> |
| <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-roles-2022.xsd#eedm"/> |
| <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended"> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_IncomeStatementAbstract"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_ProgrammingAndProductionCosts_5ad3b905-8ee2-42f7-8ffe-6fe527e2cc63" xlink:href="cmcsa-20221231.xsd#cmcsa_ProgrammingAndProductionCosts"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_cmcsa_ProgrammingAndProductionCosts_5ad3b905-8ee2-42f7-8ffe-6fe527e2cc63" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_GoodwillAndIntangibleAssetImpairment"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetImpairment" xlink:type="arc" order="2"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsNoncurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsNoncurrentAbstract"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_cmcsa_FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent_761291b9-24c9-4d11-9be5-f8553e511fad" xlink:href="cmcsa-20221231.xsd#cmcsa_FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsNoncurrentAbstract" xlink:to="loc_cmcsa_FilmMonetizedOnItsOwnAndEntertainmentLicenseAgreementForProgramMaterialIncludingSportsRightsAdvancesCapitalizedCostsNoncurrent_761291b9-24c9-4d11-9be5-f8553e511fad" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AssetsAbstract"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_OtherAssetsNoncurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract" xlink:to="loc_us-gaap_OtherAssetsNoncurrent" xlink:type="arc" order="1"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_LiabilitiesCurrentAbstract"/> |
| | <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:href="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd#us-gaap_AccruedLiabilitiesCurrent"/> |
| | <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent" xlink:type="arc" order="1"/> |
| | </link:definitionLink> |
| </link:linkbase> |