| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<FilingSummary> |
| <Version> 3.23.3 </Version> |
| <ProcessingTime/> |
| <ReportFormat> html </ReportFormat> |
| <ContextCount> 228 </ContextCount> |
| <ElementCount> 204 </ElementCount> |
| <EntityCount> 1 </EntityCount> |
| <FootnotesReported> false </FootnotesReported> |
| <SegmentCount> 52 </SegmentCount> |
| <ScenarioCount> 0 </ScenarioCount> |
| <TuplesReported> false </TuplesReported> |
| <UnitCount> 7 </UnitCount> |
| <MyReports> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R1.htm </HtmlFileName> |
| | | <LongName> 1001 - Document - Cover Page </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CoverPage </Role> |
| | | <ShortName> Cover Page </ShortName> |
| | | <MenuCategory> Cover </MenuCategory> |
| | | <Position> 1 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R2.htm </HtmlFileName> |
| | | <LongName> 1002 - Statement - Condensed Consolidated Unaudited Statements of Income </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CondensedConsolidatedUnauditedStatementsOfIncome </Role> |
| | | <ShortName> Condensed Consolidated Unaudited Statements of Income </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 2 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R3.htm </HtmlFileName> |
| | | <LongName> 1003 - Statement - Condensed Consolidated Unaudited Statements of Comprehensive Income </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CondensedConsolidatedUnauditedStatementsOfComprehensiveIncome </Role> |
| | | <ShortName> Condensed Consolidated Unaudited Statements of Comprehensive Income </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 3 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R4.htm </HtmlFileName> |
| | | <LongName> 1004 - Statement - Condensed Consolidated Unaudited Balance Sheets </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CondensedConsolidatedUnauditedBalanceSheets </Role> |
| | | <ShortName> Condensed Consolidated Unaudited Balance Sheets </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 4 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R5.htm </HtmlFileName> |
| | | <LongName> 1005 - Statement - Condensed Consolidated Unaudited Balance Sheets (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CondensedConsolidatedUnauditedBalanceSheetsParenthetical </Role> |
| | | <ShortName> Condensed Consolidated Unaudited Balance Sheets (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 5 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R6.htm </HtmlFileName> |
| | | <LongName> 1006 - Statement - Condensed Consolidated Unaudited Statements of Shareholders' Equity </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CondensedConsolidatedUnauditedStatementsOfShareholdersEquity </Role> |
| | | <ShortName> Condensed Consolidated Unaudited Statements of Shareholders' Equity </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 6 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R7.htm </HtmlFileName> |
| | | <LongName> 1007 - Statement - Condensed Consolidated Unaudited Statements of Shareholders' Equity (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CondensedConsolidatedUnauditedStatementsOfShareholdersEquityParenthetical </Role> |
| | | <ShortName> Condensed Consolidated Unaudited Statements of Shareholders' Equity (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 7 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R8.htm </HtmlFileName> |
| | | <LongName> 1008 - Statement - Condensed Consolidated Unaudited Statements of Cash Flows </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CondensedConsolidatedUnauditedStatementsOfCashFlows </Role> |
| | | <ShortName> Condensed Consolidated Unaudited Statements of Cash Flows </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 8 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R9.htm </HtmlFileName> |
| | | <LongName> 995410 - Disclosure - Pay vs Performance Disclosure </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://xbrl.sec.gov/ecd/role/PvpDisclosure </Role> |
| | | <ShortName> Pay vs Performance Disclosure </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 9 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R10.htm </HtmlFileName> |
| | | <LongName> 995445 - Disclosure - Insider Trading Arrangements </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements </Role> |
| | | <ShortName> Insider Trading Arrangements </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 10 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R11.htm </HtmlFileName> |
| | | <LongName> 999001 - Disclosure - BASIS OF PRESENTATION </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/BasisOfPresentation </Role> |
| | | <ShortName> BASIS OF PRESENTATION </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 11 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R12.htm </HtmlFileName> |
| | | <LongName> 999002 - Disclosure - REVENUES </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/Revenues </Role> |
| | | <ShortName> REVENUES </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 12 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R13.htm </HtmlFileName> |
| | | <LongName> 999003 - Disclosure - EARNINGS PER SHARE </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/EarningsPerShare </Role> |
| | | <ShortName> EARNINGS PER SHARE </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 13 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R14.htm </HtmlFileName> |
| | | <LongName> 999004 - Disclosure - OTHER COMPREHENSIVE INCOME (LOSS) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/OtherComprehensiveIncomeLoss </Role> |
| | | <ShortName> OTHER COMPREHENSIVE INCOME (LOSS) </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 14 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R15.htm </HtmlFileName> |
| | | <LongName> 999005 - Disclosure - ACQUISITIONS </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/Acquisitions </Role> |
| | | <ShortName> ACQUISITIONS </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 15 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R16.htm </HtmlFileName> |
| | | <LongName> 999006 - Disclosure - DEBT </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/Debt </Role> |
| | | <ShortName> DEBT </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 16 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R17.htm </HtmlFileName> |
| | | <LongName> 999007 - Disclosure - DERIVATIVES </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/Derivatives </Role> |
| | | <ShortName> DERIVATIVES </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 17 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R18.htm </HtmlFileName> |
| | | <LongName> 999008 - Disclosure - FAIR VALUE MEASUREMENTS </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/FairValueMeasurements </Role> |
| | | <ShortName> FAIR VALUE MEASUREMENTS </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 18 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R19.htm </HtmlFileName> |
| | | <LongName> 999009 - Disclosure - SHAREHOLDERS' EQUITY </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/ShareholdersEquity </Role> |
| | | <ShortName> SHAREHOLDERS' EQUITY </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 19 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R20.htm </HtmlFileName> |
| | | <LongName> 999010 - Disclosure - COMMITMENTS AND CONTINGENCIES </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CommitmentsAndContingencies </Role> |
| | | <ShortName> COMMITMENTS AND CONTINGENCIES </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 20 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R21.htm </HtmlFileName> |
| | | <LongName> 999011 - Disclosure - RELATED PARTY TRANSACTIONS </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/RelatedPartyTransactions </Role> |
| | | <ShortName> RELATED PARTY TRANSACTIONS </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 21 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R22.htm </HtmlFileName> |
| | | <LongName> 999012 - Disclosure - BASIS OF PRESENTATION (Policies) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/BasisOfPresentationPolicies </Role> |
| | | <ShortName> BASIS OF PRESENTATION (Policies) </ShortName> |
| | | <MenuCategory> Policies </MenuCategory> |
| | | <Position> 22 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R23.htm </HtmlFileName> |
| | | <LongName> 999013 - Disclosure - REVENUES (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/RevenuesTables </Role> |
| | | <ShortName> REVENUES (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.watsco.com/role/Revenues </ParentRole> |
| | | <Position> 23 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R24.htm </HtmlFileName> |
| | | <LongName> 999014 - Disclosure - EARNINGS PER SHARE (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/EarningsPerShareTables </Role> |
| | | <ShortName> EARNINGS PER SHARE (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.watsco.com/role/EarningsPerShare </ParentRole> |
| | | <Position> 24 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R25.htm </HtmlFileName> |
| | | <LongName> 999015 - Disclosure - OTHER COMPREHENSIVE INCOME (LOSS) (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/OtherComprehensiveIncomeLossTables </Role> |
| | | <ShortName> OTHER COMPREHENSIVE INCOME (LOSS) (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.watsco.com/role/OtherComprehensiveIncomeLoss </ParentRole> |
| | | <Position> 25 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R26.htm </HtmlFileName> |
| | | <LongName> 999016 - Disclosure - FAIR VALUE MEASUREMENTS (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/FairValueMeasurementsTables </Role> |
| | | <ShortName> FAIR VALUE MEASUREMENTS (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.watsco.com/role/FairValueMeasurements </ParentRole> |
| | | <Position> 26 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R27.htm </HtmlFileName> |
| | | <LongName> 999017 - Disclosure - Basis of Presentation - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/BasisOfPresentationAdditionalInformationDetail </Role> |
| | | <ShortName> Basis of Presentation - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 27 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R28.htm </HtmlFileName> |
| | | <LongName> 999018 - Disclosure - Revenues - Summary of Disaggregated Revenue (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/RevenuesSummaryOfDisaggregatedRevenueDetail </Role> |
| | | <ShortName> Revenues - Summary of Disaggregated Revenue (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 28 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R29.htm </HtmlFileName> |
| | | <LongName> 999019 - Disclosure - Earnings Per Share - Schedule of Basic and Diluted Earnings per Common Share (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/EarningsPerShareScheduleOfBasicAndDilutedEarningsPerCommonShareDetail </Role> |
| | | <ShortName> Earnings Per Share - Schedule of Basic and Diluted Earnings per Common Share (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 29 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R30.htm </HtmlFileName> |
| | | <LongName> 999020 - Disclosure - Earnings Per Share - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/EarningsPerShareAdditionalInformationDetail </Role> |
| | | <ShortName> Earnings Per Share - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 30 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R31.htm </HtmlFileName> |
| | | <LongName> 999021 - Disclosure - Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Loss (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/OtherComprehensiveIncomeLossScheduleOfAccumulatedOtherComprehensiveLossDetail </Role> |
| | | <ShortName> Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Loss (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 31 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R32.htm </HtmlFileName> |
| | | <LongName> 999022 - Disclosure - Acquisitions - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/AcquisitionsAdditionalInformationDetail </Role> |
| | | <ShortName> Acquisitions - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 32 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R33.htm </HtmlFileName> |
| | | <LongName> 999023 - Disclosure - Debt - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/DebtAdditionalInformationDetail </Role> |
| | | <ShortName> Debt - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 33 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R34.htm </HtmlFileName> |
| | | <LongName> 999024 - Disclosure - Derivatives - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/DerivativesAdditionalInformationDetail </Role> |
| | | <ShortName> Derivatives - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 34 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R35.htm </HtmlFileName> |
| | | <LongName> 999025 - Disclosure - Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/FairValueMeasurementsAssetsAndLiabilitiesCarriedAtFairValueMeasuredOnRecurringBasisDetail </Role> |
| | | <ShortName> Fair Value Measurements - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 35 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R36.htm </HtmlFileName> |
| | | <LongName> 999026 - Disclosure - Shareholders' Equity - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/ShareholdersEquityAdditionalInformationDetail </Role> |
| | | <ShortName> Shareholders' Equity - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 36 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R37.htm </HtmlFileName> |
| | | <LongName> 999027 - Disclosure - Commitments and Contingencies - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/CommitmentsAndContingenciesAdditionalInformationDetail </Role> |
| | | <ShortName> Commitments and Contingencies - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 37 </Position> |
| | | </Report> |
| | <Report instance="d585205d10q.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R38.htm </HtmlFileName> |
| | | <LongName> 999028 - Disclosure - Related Party Transactions - Additional Information (Detail) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.watsco.com/role/RelatedPartyTransactionsAdditionalInformationDetail </Role> |
| | | <ShortName> Related Party Transactions - Additional Information (Detail) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 38 </Position> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
| | | </Report> |
| | </MyReports> |
| <InputFiles> |
| | <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="d585205d10q.htm"> d585205d10q.htm </File> |
| | <File> wso-20230930.xsd </File> |
| | <File> wso-20230930_cal.xml </File> |
| | <File> wso-20230930_def.xml </File> |
| | <File> wso-20230930_lab.xml </File> |
| | <File> wso-20230930_pre.xml </File> |
| | </InputFiles> |
| <SupplementalFiles> |
| | <File> g585205g1028001113928.jpg </File> |
| | </SupplementalFiles> |
| <BaseTaxonomies> |
| | <BaseTaxonomy items="608"> http://fasb.org/us-gaap/2023 </BaseTaxonomy> |
| | <BaseTaxonomy items="34"> http://xbrl.sec.gov/dei/2023 </BaseTaxonomy> |
| | <BaseTaxonomy items="4"> http://xbrl.sec.gov/ecd/2023 </BaseTaxonomy> |
| | </BaseTaxonomies> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |