SEC Info  
    Home      Search      My Interests      Help      Sign In      Please Sign In
 
We’re going down soon, to move to a new Data Center today.  We’ll be up ASAP.  Sorry.

IAC Inc. – ‘10-Q’ for 9/30/23 – ‘XML’

On:  Tuesday, 11/7/23, at 4:26pm ET   ·   For:  9/30/23   ·   Accession #:  1800227-23-34   ·   File #:  1-39356

Previous ‘10-Q’:  ‘10-Q’ on 8/8/23 for 6/30/23   ·   Next & Latest:  ‘10-Q’ on 5/7/24 for 3/31/24   ·   5 References:   

Find Words in Filings emoji
 
  in    Show  and   Hints

  As Of               Filer                 Filing    For·On·As Docs:Size

11/07/23  IAC Inc.                          10-Q        9/30/23   79:13M

Quarterly Report   —   Form 10-Q

Filing Table of Contents

Document/Exhibit                   Description                      Pages   Size 

 1: 10-Q        Quarterly Report                                    HTML   2.93M 
 2: EX-31.1     Certification -- §302 - SOA'02                      HTML     28K 
 3: EX-31.2     Certification -- §302 - SOA'02                      HTML     28K 
 4: EX-31.3     Certification -- §302 - SOA'02                      HTML     28K 
 5: EX-32.1     Certification -- §906 - SOA'02                      HTML     24K 
 6: EX-32.2     Certification -- §906 - SOA'02                      HTML     24K 
 7: EX-32.3     Certification -- §906 - SOA'02                      HTML     24K 
13: R1          Cover Page                                          HTML     79K 
14: R2          Consolidated Balance Sheet                          HTML    147K 
15: R3          Consolidated Balance Sheet (Parenthetical)          HTML     38K 
16: R4          Consolidated Statement of Operations                HTML    126K 
17: R5          Consolidated Statement of Comprehensive Operations  HTML     72K 
18: R6          Consolidated Statement of Shareholders' Equity      HTML    151K 
19: R7          Consolidated Statement of Shareholders' Equity      HTML     29K 
                (Parenthetical)                                                  
20: R8          Consolidated Statement of Cash Flows                HTML    142K 
21: R9          The Company and Summary of Significant Accounting   HTML     49K 
                Policies                                                         
22: R10         Financial Instruments and Fair Value Measurements   HTML    168K 
23: R11         Long-Term Debt                                      HTML     50K 
24: R12         Accumulated Other Comprehensive Loss                HTML     70K 
25: R13         Segment Information                                 HTML    519K 
26: R14         Dotdash Meredith Restructuring Charges,             HTML     82K 
                Transaction-Related Expenses and Change-In-Control               
                Payments                                                         
27: R15         Pension and Postretirement Benefit Plans            HTML     78K 
28: R16         Income Taxes                                        HTML     36K 
29: R17         Loss Per Share                                      HTML     79K 
30: R18         Financial Statement Details                         HTML     77K 
31: R19         Contingencies                                       HTML     29K 
32: R20         Related Party Transactions                          HTML     34K 
33: R21         Subsequent Event                                    HTML     25K 
34: R22         Pay vs Performance Disclosure                       HTML     35K 
35: R23         Insider Trading Arrangements                        HTML     29K 
36: R24         The Company and Summary of Significant Accounting   HTML     60K 
                Policies (Policies)                                              
37: R25         Financial Instruments and Fair Value Measurements   HTML    165K 
                (Tables)                                                         
38: R26         Long-Term Debt (Tables)                             HTML     44K 
39: R27         Accumulated Other Comprehensive Loss (Tables)       HTML     69K 
40: R28         Segment Information (Tables)                        HTML    522K 
41: R29         Dotdash Meredith Restructuring Charges,             HTML     81K 
                Transaction-Related Expenses and Change-In-Control               
                Payments (Tables)                                                
42: R30         Pension and Postretirement Benefit Plans (Tables)   HTML     75K 
43: R31         Loss Per Share (Tables)                             HTML     76K 
44: R32         Financial Statement Details (Tables)                HTML     95K 
45: R33         THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING   HTML     75K 
                POLICIES - Narrative (Details)                                   
46: R34         FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS   HTML     30K 
                - Fair Value of Marketable Securities (Details)                  
47: R35         FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS   HTML    124K 
                - Narrative (Details)                                            
48: R36         FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS   HTML     40K 
                - Current Available-for-Sale Marketable Securities               
                (Details)                                                        
49: R37         FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS   HTML     25K 
                - Investments in MGM Resorts International                       
                (Details)                                                        
50: R38         FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS   HTML     30K 
                - Long-term Investments (Details)                                
51: R39         FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS   HTML     38K 
                - Realized and Unrealized Gains and Losses                       
                (Details)                                                        
52: R40         FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS   HTML     78K 
                - Assets and Liabilities Measured at Fair Value on               
                a Recurring Basis (Details)                                      
53: R41         FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS   HTML     39K 
                - Changes in Level 3 Assets and Liabilities                      
                Measured at Fair Value on a Recurring Basis                      
                (Details)                                                        
54: R42         LONG-TERM DEBT - Summary (Details)                  HTML     59K 
55: R43         LONG-TERM DEBT - Narrative (Details)                HTML    129K 
56: R44         Accumulated Other Comprehensive Loss (Details)      HTML     89K 
57: R45         SEGMENT INFORMATION - Revenue by Reportable         HTML     64K 
                Segment (Details)                                                
58: R46         SEGMENT INFORMATION - Revenue Disaggregated by      HTML    119K 
                Service (Details)                                                
59: R47         SEGMENT INFORMATION - Revenue and Long-Lived        HTML     40K 
                Assets (Details)                                                 
60: R48         SEGMENT INFORMATION - Operating (Loss) Income and   HTML     82K 
                Adjusted EBITDA (Details)                                        
61: R49         SEGMENT INFORMATION - Reconciliation of Adjusted    HTML    145K 
                EBITDA to Operating Income (Details)                             
62: R50         DOTDASH MEREDITH RESTRUCTURING CHARGES,             HTML     37K 
                TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL               
                PAYMENTS - Narrative (Details)                                   
63: R51         Dotdash Meredith Restructuring Charges,             HTML     64K 
                Transaction-Related Expenses and Change-In-Control               
                Payments (Details)                                               
64: R52         Dotdash Meredith Restructuring Charges,             HTML     39K 
                Transaction-Related Expenses and Change-In-Control               
                Payments - Allocation of Restructuring Costs                     
                (Details)                                                        
65: R53         PENSION AND POSTRETIREMENT BENEFIT PLANS -          HTML     52K 
                Components of Net Periodic Benefit Costs (Details)               
66: R54         PENSION AND POSTRETIREMENT BENEFIT PLANS -          HTML     34K 
                Narrative (Details)                                              
67: R55         PENSION AND POSTRETIREMENT BENEFIT PLANS -          HTML     28K 
                Expected Return on Plan Assets (Details)                         
68: R56         INCOME TAXES - Narrative (Details)                  HTML     56K 
69: R57         LOSS PER SHARE - Summary (Details)                  HTML     95K 
70: R58         FINANCIAL STATEMENT DETAILS - Cash, Cash            HTML     35K 
                Equivalents, and Restricted Cash (Details)                       
71: R59         FINANCIAL STATEMENT DETAILS - Allowance for Credit  HTML     35K 
                Loss (Details)                                                   
72: R60         FINANCIAL STATEMENT DETAILS - Accumulated           HTML     30K 
                Amortization and Depreciation (Details)                          
73: R61         FINANCIAL STATEMENT DETAILS - Other Income          HTML     49K 
                (Expense), Net (Details)                                         
74: R62         RELATED PARTY TRANSACTIONS - Narrative (Details)    HTML     57K 
77: XML         IDEA XML File -- Filing Summary                      XML    140K 
75: XML         XBRL Instance -- iaci-20230930_htm                   XML   4.05M 
76: EXCEL       IDEA Workbook of Financial Report Info              XLSX    187K 
 9: EX-101.CAL  XBRL Calculations -- iaci-20230930_cal               XML    220K 
10: EX-101.DEF  XBRL Definitions -- iaci-20230930_def                XML    997K 
11: EX-101.LAB  XBRL Labels -- iaci-20230930_lab                     XML   2.06M 
12: EX-101.PRE  XBRL Presentations -- iaci-20230930_pre              XML   1.32M 
 8: EX-101.SCH  XBRL Schema -- iaci-20230930                         XSD    177K 
78: JSON        XBRL Instance as JSON Data -- MetaLinks              616±   904K 
79: ZIP         XBRL Zipped Folder -- 0001800227-23-000034-xbrl      Zip    685K 


‘XML’   —   IDEA XML File — Filing Summary


This Document is an IDEA XML File.


                                                                                                                                                                                
<?xml version="1.0" encoding="windows-1252"?>
<FilingSummary>
<Version> 3.23.3 </Version>
<ProcessingTime/>
<ReportFormat> html </ReportFormat>
<ContextCount> 581 </ContextCount>
<ElementCount> 347 </ElementCount>
<EntityCount> 1 </EntityCount>
<FootnotesReported> false </FootnotesReported>
<SegmentCount> 120 </SegmentCount>
<ScenarioCount> 0 </ScenarioCount>
<TuplesReported> false </TuplesReported>
<UnitCount> 7 </UnitCount>
<MyReports>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R1.htm </HtmlFileName>
<LongName> 0000001 - Document - Cover Page </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/CoverPage </Role>
<ShortName> Cover Page </ShortName>
<MenuCategory> Cover </MenuCategory>
<Position> 1 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R2.htm </HtmlFileName>
<LongName> 0000002 - Statement - CONSOLIDATED BALANCE SHEET </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/CONSOLIDATEDBALANCESHEET </Role>
<ShortName> CONSOLIDATED BALANCE SHEET </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 2 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R3.htm </HtmlFileName>
<LongName> 0000003 - Statement - CONSOLIDATED BALANCE SHEET (Parenthetical) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/CONSOLIDATEDBALANCESHEETParenthetical </Role>
<ShortName> CONSOLIDATED BALANCE SHEET (Parenthetical) </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 3 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R4.htm </HtmlFileName>
<LongName> 0000004 - Statement - CONSOLIDATED STATEMENT OF OPERATIONS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/CONSOLIDATEDSTATEMENTOFOPERATIONS </Role>
<ShortName> CONSOLIDATED STATEMENT OF OPERATIONS </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 4 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R5.htm </HtmlFileName>
<LongName> 0000005 - Statement - CONSOLIDATED STATEMENT OF COMPREHENSIVE OPERATIONS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/CONSOLIDATEDSTATEMENTOFCOMPREHENSIVEOPERATIONS </Role>
<ShortName> CONSOLIDATED STATEMENT OF COMPREHENSIVE OPERATIONS </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 5 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R6.htm </HtmlFileName>
<LongName> 0000006 - Statement - CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/CONSOLIDATEDSTATEMENTOFSHAREHOLDERSEQUITY </Role>
<ShortName> CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 6 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R7.htm </HtmlFileName>
<LongName> 0000007 - Statement - CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Parenthetical) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/CONSOLIDATEDSTATEMENTOFSHAREHOLDERSEQUITYParenthetical </Role>
<ShortName> CONSOLIDATED STATEMENT OF SHAREHOLDERS' EQUITY (Parenthetical) </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 7 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R8.htm </HtmlFileName>
<LongName> 0000008 - Statement - CONSOLIDATED STATEMENT OF CASH FLOWS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/CONSOLIDATEDSTATEMENTOFCASHFLOWS </Role>
<ShortName> CONSOLIDATED STATEMENT OF CASH FLOWS </ShortName>
<MenuCategory> Statements </MenuCategory>
<Position> 8 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R9.htm </HtmlFileName>
<LongName> 0000009 - Disclosure - THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/THECOMPANYANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIES </Role>
<ShortName> THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 9 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R10.htm </HtmlFileName>
<LongName> 0000010 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTS </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 10 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R11.htm </HtmlFileName>
<LongName> 0000011 - Disclosure - LONG-TERM DEBT </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/LONGTERMDEBT </Role>
<ShortName> LONG-TERM DEBT </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 11 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R12.htm </HtmlFileName>
<LongName> 0000012 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/ACCUMULATEDOTHERCOMPREHENSIVELOSS </Role>
<ShortName> ACCUMULATED OTHER COMPREHENSIVE LOSS </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 12 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R13.htm </HtmlFileName>
<LongName> 0000013 - Disclosure - SEGMENT INFORMATION </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/SEGMENTINFORMATION </Role>
<ShortName> SEGMENT INFORMATION </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 13 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R14.htm </HtmlFileName>
<LongName> 0000014 - Disclosure - DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/DOTDASHMEREDITHRESTRUCTURINGCHARGESTRANSACTIONRELATEDEXPENSESANDCHANGEINCONTROLPAYMENTS </Role>
<ShortName> DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 14 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R15.htm </HtmlFileName>
<LongName> 0000015 - Disclosure - PENSION AND POSTRETIREMENT BENEFIT PLANS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/PENSIONANDPOSTRETIREMENTBENEFITPLANS </Role>
<ShortName> PENSION AND POSTRETIREMENT BENEFIT PLANS </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 15 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R16.htm </HtmlFileName>
<LongName> 0000016 - Disclosure - INCOME TAXES </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/INCOMETAXES </Role>
<ShortName> INCOME TAXES </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 16 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R17.htm </HtmlFileName>
<LongName> 0000017 - Disclosure - LOSS PER SHARE </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/LOSSPERSHARE </Role>
<ShortName> LOSS PER SHARE </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 17 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R18.htm </HtmlFileName>
<LongName> 0000018 - Disclosure - FINANCIAL STATEMENT DETAILS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALSTATEMENTDETAILS </Role>
<ShortName> FINANCIAL STATEMENT DETAILS </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 18 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R19.htm </HtmlFileName>
<LongName> 0000019 - Disclosure - CONTINGENCIES </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/CONTINGENCIES </Role>
<ShortName> CONTINGENCIES </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 19 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R20.htm </HtmlFileName>
<LongName> 0000020 - Disclosure - RELATED PARTY TRANSACTIONS </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/RELATEDPARTYTRANSACTIONS </Role>
<ShortName> RELATED PARTY TRANSACTIONS </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 20 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R21.htm </HtmlFileName>
<LongName> 0000021 - Disclosure - SUBSEQUENT EVENT </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/SUBSEQUENTEVENT </Role>
<ShortName> SUBSEQUENT EVENT </ShortName>
<MenuCategory> Notes </MenuCategory>
<Position> 21 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R22.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> 22 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R23.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> 23 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R24.htm </HtmlFileName>
<LongName> 9954471 - Disclosure - THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/THECOMPANYANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies </Role>
<ShortName> THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) </ShortName>
<MenuCategory> Policies </MenuCategory>
<Position> 24 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R25.htm </HtmlFileName>
<LongName> 9954472 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSTables </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTS </ParentRole>
<Position> 25 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R26.htm </HtmlFileName>
<LongName> 9954473 - Disclosure - LONG-TERM DEBT (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/LONGTERMDEBTTables </Role>
<ShortName> LONG-TERM DEBT (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.iac.com/role/LONGTERMDEBT </ParentRole>
<Position> 26 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R27.htm </HtmlFileName>
<LongName> 9954474 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/ACCUMULATEDOTHERCOMPREHENSIVELOSSTables </Role>
<ShortName> ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.iac.com/role/ACCUMULATEDOTHERCOMPREHENSIVELOSS </ParentRole>
<Position> 27 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R28.htm </HtmlFileName>
<LongName> 9954475 - Disclosure - SEGMENT INFORMATION (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/SEGMENTINFORMATIONTables </Role>
<ShortName> SEGMENT INFORMATION (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.iac.com/role/SEGMENTINFORMATION </ParentRole>
<Position> 28 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R29.htm </HtmlFileName>
<LongName> 9954476 - Disclosure - DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/DOTDASHMEREDITHRESTRUCTURINGCHARGESTRANSACTIONRELATEDEXPENSESANDCHANGEINCONTROLPAYMENTSTables </Role>
<ShortName> DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.iac.com/role/DOTDASHMEREDITHRESTRUCTURINGCHARGESTRANSACTIONRELATEDEXPENSESANDCHANGEINCONTROLPAYMENTS </ParentRole>
<Position> 29 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R30.htm </HtmlFileName>
<LongName> 9954477 - Disclosure - PENSION AND POSTRETIREMENT BENEFIT PLANS (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/PENSIONANDPOSTRETIREMENTBENEFITPLANSTables </Role>
<ShortName> PENSION AND POSTRETIREMENT BENEFIT PLANS (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.iac.com/role/PENSIONANDPOSTRETIREMENTBENEFITPLANS </ParentRole>
<Position> 30 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R31.htm </HtmlFileName>
<LongName> 9954478 - Disclosure - LOSS PER SHARE (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/LOSSPERSHARETables </Role>
<ShortName> LOSS PER SHARE (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.iac.com/role/LOSSPERSHARE </ParentRole>
<Position> 31 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R32.htm </HtmlFileName>
<LongName> 9954479 - Disclosure - FINANCIAL STATEMENT DETAILS (Tables) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALSTATEMENTDETAILSTables </Role>
<ShortName> FINANCIAL STATEMENT DETAILS (Tables) </ShortName>
<MenuCategory> Tables </MenuCategory>
<ParentRole> http://www.iac.com/role/FINANCIALSTATEMENTDETAILS </ParentRole>
<Position> 32 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R33.htm </HtmlFileName>
<LongName> 9954480 - Disclosure - THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/THECOMPANYANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESNarrativeDetails </Role>
<ShortName> THE COMPANY AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.iac.com/role/THECOMPANYANDSUMMARYOFSIGNIFICANTACCOUNTINGPOLICIESPolicies </ParentRole>
<Position> 33 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R34.htm </HtmlFileName>
<LongName> 9954481 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Fair Value of Marketable Securities (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSFairValueofMarketableSecuritiesDetails </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Fair Value of Marketable Securities (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 34 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R35.htm </HtmlFileName>
<LongName> 9954482 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Narrative (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSNarrativeDetails </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Narrative (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSTables </ParentRole>
<Position> 35 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R36.htm </HtmlFileName>
<LongName> 9954483 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Current Available-for-Sale Marketable Securities (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSCurrentAvailableforSaleMarketableSecuritiesDetails </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Current Available-for-Sale Marketable Securities (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 36 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R37.htm </HtmlFileName>
<LongName> 9954484 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Investments in MGM Resorts International (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSInvestmentsinMGMResortsInternationalDetails </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Investments in MGM Resorts International (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 37 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R38.htm </HtmlFileName>
<LongName> 9954485 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Long-term Investments (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSLongtermInvestmentsDetails </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Long-term Investments (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 38 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R39.htm </HtmlFileName>
<LongName> 9954486 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Realized and Unrealized Gains and Losses (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSRealizedandUnrealizedGainsandLossesDetails </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Realized and Unrealized Gains and Losses (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 39 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R40.htm </HtmlFileName>
<LongName> 9954487 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSAssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 40 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R41.htm </HtmlFileName>
<LongName> 9954488 - Disclosure - FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALINSTRUMENTSANDFAIRVALUEMEASUREMENTSChangesinLevel3AssetsandLiabilitiesMeasuredatFairValueonaRecurringBasisDetails </Role>
<ShortName> FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS - Changes in Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 41 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R42.htm </HtmlFileName>
<LongName> 9954489 - Disclosure - LONG-TERM DEBT - Summary (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/LONGTERMDEBTSummaryDetails </Role>
<ShortName> LONG-TERM DEBT - Summary (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 42 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R43.htm </HtmlFileName>
<LongName> 9954490 - Disclosure - LONG-TERM DEBT - Narrative (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/LONGTERMDEBTNarrativeDetails </Role>
<ShortName> LONG-TERM DEBT - Narrative (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 43 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R44.htm </HtmlFileName>
<LongName> 9954491 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/ACCUMULATEDOTHERCOMPREHENSIVELOSSDetails </Role>
<ShortName> ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.iac.com/role/ACCUMULATEDOTHERCOMPREHENSIVELOSSTables </ParentRole>
<Position> 44 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R45.htm </HtmlFileName>
<LongName> 9954492 - Disclosure - SEGMENT INFORMATION - Revenue by Reportable Segment (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/SEGMENTINFORMATIONRevenuebyReportableSegmentDetails </Role>
<ShortName> SEGMENT INFORMATION - Revenue by Reportable Segment (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 45 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R46.htm </HtmlFileName>
<LongName> 9954493 - Disclosure - SEGMENT INFORMATION - Revenue Disaggregated by Service (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/SEGMENTINFORMATIONRevenueDisaggregatedbyServiceDetails </Role>
<ShortName> SEGMENT INFORMATION - Revenue Disaggregated by Service (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 46 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R47.htm </HtmlFileName>
<LongName> 9954494 - Disclosure - SEGMENT INFORMATION - Revenue and Long-Lived Assets (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/SEGMENTINFORMATIONRevenueandLongLivedAssetsDetails </Role>
<ShortName> SEGMENT INFORMATION - Revenue and Long-Lived Assets (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 47 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R48.htm </HtmlFileName>
<LongName> 9954495 - Disclosure - SEGMENT INFORMATION - Operating (Loss) Income and Adjusted EBITDA (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/SEGMENTINFORMATIONOperatingLossIncomeandAdjustedEBITDADetails </Role>
<ShortName> SEGMENT INFORMATION - Operating (Loss) Income and Adjusted EBITDA (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 48 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R49.htm </HtmlFileName>
<LongName> 9954496 - Disclosure - SEGMENT INFORMATION - Reconciliation of Adjusted EBITDA to Operating Income (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/SEGMENTINFORMATIONReconciliationofAdjustedEBITDAtoOperatingIncomeDetails </Role>
<ShortName> SEGMENT INFORMATION - Reconciliation of Adjusted EBITDA to Operating Income (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 49 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R50.htm </HtmlFileName>
<LongName> 9954497 - Disclosure - DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS - Narrative (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/DOTDASHMEREDITHRESTRUCTURINGCHARGESTRANSACTIONRELATEDEXPENSESANDCHANGEINCONTROLPAYMENTSNarrativeDetails </Role>
<ShortName> DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS - Narrative (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.iac.com/role/DOTDASHMEREDITHRESTRUCTURINGCHARGESTRANSACTIONRELATEDEXPENSESANDCHANGEINCONTROLPAYMENTSTables </ParentRole>
<Position> 50 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R51.htm </HtmlFileName>
<LongName> 9954498 - Disclosure - DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/DOTDASHMEREDITHRESTRUCTURINGCHARGESTRANSACTIONRELATEDEXPENSESANDCHANGEINCONTROLPAYMENTSDetails </Role>
<ShortName> DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<ParentRole> http://www.iac.com/role/DOTDASHMEREDITHRESTRUCTURINGCHARGESTRANSACTIONRELATEDEXPENSESANDCHANGEINCONTROLPAYMENTSTables </ParentRole>
<Position> 51 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R52.htm </HtmlFileName>
<LongName> 9954499 - Disclosure - DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS - Allocation of Restructuring Costs (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/DOTDASHMEREDITHRESTRUCTURINGCHARGESTRANSACTIONRELATEDEXPENSESANDCHANGEINCONTROLPAYMENTSAllocationofRestructuringCostsDetails </Role>
<ShortName> DOTDASH MEREDITH RESTRUCTURING CHARGES, TRANSACTION-RELATED EXPENSES AND CHANGE-IN-CONTROL PAYMENTS - Allocation of Restructuring Costs (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 52 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R53.htm </HtmlFileName>
<LongName> 9954500 - Disclosure - PENSION AND POSTRETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Costs (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/PENSIONANDPOSTRETIREMENTBENEFITPLANSComponentsofNetPeriodicBenefitCostsDetails </Role>
<ShortName> PENSION AND POSTRETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Costs (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 53 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R54.htm </HtmlFileName>
<LongName> 9954501 - Disclosure - PENSION AND POSTRETIREMENT BENEFIT PLANS - Narrative (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/PENSIONANDPOSTRETIREMENTBENEFITPLANSNarrativeDetails </Role>
<ShortName> PENSION AND POSTRETIREMENT BENEFIT PLANS - Narrative (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 54 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R55.htm </HtmlFileName>
<LongName> 9954502 - Disclosure - PENSION AND POSTRETIREMENT BENEFIT PLANS - Expected Return on Plan Assets (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/PENSIONANDPOSTRETIREMENTBENEFITPLANSExpectedReturnonPlanAssetsDetails </Role>
<ShortName> PENSION AND POSTRETIREMENT BENEFIT PLANS - Expected Return on Plan Assets (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 55 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R56.htm </HtmlFileName>
<LongName> 9954503 - Disclosure - INCOME TAXES - Narrative (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/INCOMETAXESNarrativeDetails </Role>
<ShortName> INCOME TAXES - Narrative (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 56 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R57.htm </HtmlFileName>
<LongName> 9954504 - Disclosure - LOSS PER SHARE - Summary (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/LOSSPERSHARESummaryDetails </Role>
<ShortName> LOSS PER SHARE - Summary (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 57 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R58.htm </HtmlFileName>
<LongName> 9954505 - Disclosure - FINANCIAL STATEMENT DETAILS - Cash, Cash Equivalents, and Restricted Cash (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALSTATEMENTDETAILSCashCashEquivalentsandRestrictedCashDetails </Role>
<ShortName> FINANCIAL STATEMENT DETAILS - Cash, Cash Equivalents, and Restricted Cash (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 58 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R59.htm </HtmlFileName>
<LongName> 9954506 - Disclosure - FINANCIAL STATEMENT DETAILS - Allowance for Credit Loss (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALSTATEMENTDETAILSAllowanceforCreditLossDetails </Role>
<ShortName> FINANCIAL STATEMENT DETAILS - Allowance for Credit Loss (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 59 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R60.htm </HtmlFileName>
<LongName> 9954507 - Disclosure - FINANCIAL STATEMENT DETAILS - Accumulated Amortization and Depreciation (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALSTATEMENTDETAILSAccumulatedAmortizationandDepreciationDetails </Role>
<ShortName> FINANCIAL STATEMENT DETAILS - Accumulated Amortization and Depreciation (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 60 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R61.htm </HtmlFileName>
<LongName> 9954508 - Disclosure - FINANCIAL STATEMENT DETAILS - Other Income (Expense), Net (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/FINANCIALSTATEMENTDETAILSOtherIncomeExpenseNetDetails </Role>
<ShortName> FINANCIAL STATEMENT DETAILS - Other Income (Expense), Net (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 61 </Position>
</Report>
<Report instance="iaci-20230930.htm">
<IsDefault> false </IsDefault>
<HasEmbeddedReports> false </HasEmbeddedReports>
<HtmlFileName> R62.htm </HtmlFileName>
<LongName> 9954509 - Disclosure - RELATED PARTY TRANSACTIONS - Narrative (Details) </LongName>
<ReportType> Sheet </ReportType>
<Role> http://www.iac.com/role/RELATEDPARTYTRANSACTIONSNarrativeDetails </Role>
<ShortName> RELATED PARTY TRANSACTIONS - Narrative (Details) </ShortName>
<MenuCategory> Details </MenuCategory>
<Position> 62 </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="iaci-20230930.htm"> iaci-20230930.htm </File>
<File> iaci-20230930.xsd </File>
<File> iaci-20230930_cal.xml </File>
<File> iaci-20230930_def.xml </File>
<File> iaci-20230930_lab.xml </File>
<File> iaci-20230930_pre.xml </File>
</InputFiles>
<SupplementalFiles>
<File> iaci-20230930_g1.jpg </File>
</SupplementalFiles>
<BaseTaxonomies>
<BaseTaxonomy items="1650"> http://fasb.org/us-gaap/2023 </BaseTaxonomy>
<BaseTaxonomy items="30"> 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>


5 Previous Filings that this Filing References

  As Of               Filer                 Filing    For·On·As Docs:Size             Issuer                      Filing Agent

 9/18/23  IAC Inc.                          8-K:5,9     9/14/23   11:338K                                   Toppan Merrill/FA
 3/01/23  IAC Inc.                          10-K       12/31/22  150:26M
 8/12/22  IAC Inc.                          8-K:5,9     8/11/22   12:306K                                   Toppan Merrill/FA
 5/26/21  IAC Inc.                          S-8 POS     5/26/21    4:138K                                   Toppan Merrill/FA
 7/02/20  IAC Inc.                          8-K:1,2,3,5 6/30/20   22:1.2M                                   Toppan Merrill/FA
Top
Filing Submission 0001800227-23-000034   –   Alternative Formats (Word / Rich Text, HTML, Plain Text, et al.)

Copyright © 2024 Fran Finnegan & Company LLC – All Rights Reserved.
AboutPrivacyRedactionsHelp — Sat., May 11, 6:03:18.1am ET