$IAC
IAC Inc. Stock $iac

$iac Overview Financials Valuation SEC Filings Company Website

2023 Q4 Form 10-K Financial Statement

#000180022724000011 Filed on February 29, 2024

Income Statement

Concept	2023 Q4	2023	2022 Q4
Revenue	$1.058B	$4.365B	$1.246B
YoY Change	-15.12%	-16.62%	7.5%
Cost Of Revenue	$304.9M	$1.343B	$416.1M
YoY Change	-26.73%	-30.14%	-17.53%
Gross Profit	$753.1M	$3.022B	$830.3M
YoY Change	-9.3%	-8.77%	26.79%
Gross Profit Margin	71.18%	69.23%	66.62%
Selling, General & Admin	$541.8M	$2.468B	$649.8M
YoY Change	-16.61%	-14.98%	2.03%
% of Gross Profit	71.94%	81.67%	78.25%
Research & Development	$83.59M	$334.5M	$91.39M
YoY Change	-8.53%	0.49%	152.52%
% of Gross Profit	11.1%	11.07%	11.01%
Depreciation & Amortization	$164.7M	$471.1M	$117.8M
YoY Change	39.78%	259.63%	129.99%
% of Gross Profit	21.86%	15.59%	14.19%
Operating Expenses	$790.1M	$3.274B	$859.0M
YoY Change	-8.02%	1.17%	18.6%
Operating Profit	-$36.96M	-$251.8M	-$28.63M
YoY Change	29.08%	-46.97%	-58.72%
Interest Expense	$472.4M	$564.0M	$215.2M
YoY Change	119.52%	411.99%	89.9%
% of Operating Profit
Other Income/Expense, Net	$3.673M	$63.86M	-$217.9M
YoY Change	-101.69%	-129.32%	322.15%
Pretax Income	$439.1M	$367.1M	-$18.58M
YoY Change	-2463.3%	-124.05%	307.72%
Income Tax	$112.5M	$108.8M	-$5.570M
% Of Pretax Income	25.61%	29.64%
Net Earnings	$327.8M	$265.9M	-$1.419M
YoY Change	-23197.25%	-122.73%	-110.94%
Net Earnings / Revenue	30.98%	6.09%	-0.11%
Basic Earnings Per Share		$3.07
Diluted Earnings Per Share	$3.70	$2.97	-$0.02
COMMON SHARES
Basic Shares Outstanding		83.57M shares
Diluted Shares Outstanding		86.46M shares

Balance Sheet

Concept	2023 Q4	2023	2022 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$1.446B	$1.446B	$1.652B
YoY Change	-12.47%	-12.69%	-22.01%
Cash & Equivalents	$1.297B	$1.297B	$1.417B
Short-Term Investments	$149.0M	$149.0M	$235.1M
Other Short-Term Assets	$257.5M	$257.5M	$296.6M
YoY Change	-13.17%	-13.17%	22.45%
Inventory
Prepaid Expenses	$91.12M		$80.04M
Receivables	$536.7M	$536.7M	$607.8M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$2.241B	$2.241B	$2.561B
YoY Change	-12.52%	-12.52%	-16.68%
LONG-TERM ASSETS
Property, Plant & Equipment	$455.3M	$455.3M	$510.6M
YoY Change	-10.84%	-51.5%	-10.5%
Goodwill	$3.024B		$3.030B
YoY Change	-0.19%		-6.09%
Intangibles	$874.7M		$1.170B
YoY Change	-25.24%		-17.31%
Long-Term Investments	$3.303B	$3.303B	$2.191M
YoY Change	150656.09%	32.34%	-31.3%
Other Assets	$473.3M	$473.3M	$625.8M
YoY Change	-24.37%	139.49%	-39.66%
Total Long-Term Assets	$8.131B	$8.131B	$7.833B
YoY Change	3.81%	3.81%	-15.11%
TOTAL ASSETS
Total Short-Term Assets	$2.241B	$2.241B	$2.561B
Total Long-Term Assets	$8.131B	$8.131B	$7.833B
Total Assets	$10.37B	$10.37B	$10.39B
YoY Change	-0.22%	-0.22%	-15.5%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$105.5M	$105.5M	$133.1M
YoY Change	-20.73%	-20.73%	-34.49%
Accrued Expenses	$671.5M	$671.5M	$759.8M
YoY Change	-11.61%	58.38%	-22.52%
Deferred Revenue	$143.4M		$157.1M
YoY Change	-8.72%		-5.08%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$30.00M	$30.00M	$30.00M
YoY Change	0.0%	0.0%	0.0%
Total Short-Term Liabilities	$950.5M	$950.5M	$1.080B
YoY Change	-11.99%	-11.99%	-21.69%
LONG-TERM LIABILITIES
Long-Term Debt	$1.993B	$1.993B	$2.020B
YoY Change	-1.32%	-1.32%	-1.29%
Other Long-Term Liabilities	$474.5M	$474.5M	$617.8M
YoY Change	-23.19%	-23.19%	-14.34%
Total Long-Term Liabilities	$2.468B	$2.468B	$2.638B
YoY Change	-6.44%	-6.44%	-4.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$950.5M	$950.5M	$1.080B
Total Long-Term Liabilities	$2.468B	$2.468B	$2.638B
Total Liabilities	$4.293B	$4.293B	$3.718B
YoY Change	15.49%	-3.78%	-10.35%
SHAREHOLDERS EQUITY
Retained Earnings	$923.0K		-$265.0M
YoY Change	-100.35%		-129.28%
Common Stock	$6.340B		$6.295B
YoY Change	0.72%		0.47%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$252.4M		$85.32M
YoY Change	195.87%
Treasury Stock Shares			1.101M shares
Shareholders Equity	$6.078B	$6.078B	$5.932B
YoY Change
Total Liabilities & Shareholders Equity	$10.37B	$10.37B	$10.39B
YoY Change	-0.22%	-0.22%	-15.5%

Cashflow Statement

Concept	2023 Q4	2023	2022 Q4
OPERATING ACTIVITIES
Net Income	$327.8M	$265.9M	-$1.419M
YoY Change	-23197.25%	-122.73%	-110.94%
Depreciation, Depletion And Amortization	$164.7M	$471.1M	$117.8M
YoY Change	39.78%	259.63%	129.99%
Cash From Operating Activities	$46.93M	$189.5M	$18.70M
YoY Change	150.93%	-328.92%	-120.61%
INVESTING ACTIVITIES
Capital Expenditures	$14.76M	$141.4M	$26.91M
YoY Change	-45.14%	1.15%	-229.33%
Acquisitions		$0.00
YoY Change
Other Investing Activities	$30.70M	$53.90M	-$173.7M
YoY Change	-117.67%	-438.95%	-93.49%
Cash From Investing Activities	$15.93M	-$87.47M	-$200.7M
YoY Change	-107.94%	-82.32%	-92.54%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	-$7.424M	-$176.4M
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-18.41M	-223.0M	-11.41M
YoY Change	61.35%	97.97%	-100.77%
NET CHANGE
Cash From Operating Activities	46.93M	189.5M	18.70M
Cash From Investing Activities	15.93M	-87.47M	-200.7M
Cash From Financing Activities	-18.41M	-223.0M	-11.41M
Net Change In Cash	44.45M	-121.0M	-193.4M
YoY Change	-122.99%	-82.62%	-85.09%
FREE CASH FLOW
Cash From Operating Activities	$46.93M	$189.5M	$18.70M
Capital Expenditures	$14.76M	$141.4M	$26.91M
Free Cash Flow	$32.16M	$48.16M	-$8.211M
YoY Change	-491.72%	-121.64%	-88.26%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2021	us-gaap	Interest Expense InterestExpense	34264000	usd
CY2022	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	34700000	usd
CY2021	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	usd
CY2023	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	0	usd
CY2022	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	1179000	usd
CY2023	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-8000	usd
CY2023	dei	Entity Central Index Key EntityCentralIndexKey	0001800227
CY2023	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2023
CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2023	dei	Amendment Flag AmendmentFlag	false
CY2023	us-gaap	Impairment Of Intangible Asset Indefinite Lived Excluding Goodwill Statement Of Income Or Comprehensive Income Extensible Enumeration ImpairmentOfIntangibleAssetIndefiniteLivedExcludingGoodwillStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration	http://fasb.org/us-gaap/2023#AmortizationOfIntangibleAssets
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssetsNoncurrent
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssetsNoncurrent
CY2023Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#AccruedLiabilitiesCurrent
CY2022Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#AccruedLiabilitiesCurrent
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesNoncurrent
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent Statement Of Financial Position Extensible List OperatingLeaseLiabilityNoncurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilitiesNoncurrent
CY2023	dei	Document Annual Report DocumentAnnualReport	true
CY2023	dei	Document Period End Date DocumentPeriodEndDate	2023-12-31
CY2023	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-39356
CY2023	dei	Entity Registrant Name EntityRegistrantName	IAC Inc.
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	84-3727412
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	555 West 18th Street
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	New York
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10011
CY2023	dei	City Area Code CityAreaCode	212
CY2023	dei	Local Phone Number LocalPhoneNumber	314-7300
CY2023	dei	Security12b Title Security12bTitle	Common Stock, par value $0.0001
CY2023	dei	Trading Symbol TradingSymbol	IAC
CY2023	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2023	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2023	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2023	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2023	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2023	dei	Document Fin Stmt Error Correction Flag DocumentFinStmtErrorCorrectionFlag	false
CY2023	dei	Entity Shell Company EntityShellCompany	false
CY2023Q2	dei	Entity Public Float EntityPublicFloat	4761375976	usd
CY2023	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2023	dei	Auditor Location AuditorLocation	New York, New York
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1297445000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1417390000	usd
CY2023Q4	us-gaap	Short Term Investments ShortTermInvestments	148998000	usd
CY2022Q4	us-gaap	Short Term Investments ShortTermInvestments	239373000	usd
CY2023Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	536650000	usd
CY2022Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	607809000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	257499000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	296563000	usd
CY2023Q4	us-gaap	Assets Current AssetsCurrent	2240592000	usd
CY2022Q4	us-gaap	Assets Current AssetsCurrent	2561135000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	455281000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	510614000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	3024266000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	3030168000	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	874705000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1170041000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2891850000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2170182000	usd
CY2023Q4	iaci	Equity Securities Without Readily Determinable Fair Value And Other Long Term Investments EquitySecuritiesWithoutReadilyDeterminableFairValueAndOtherLongTermInvestments	411216000	usd
CY2022Q4	iaci	Equity Securities Without Readily Determinable Fair Value And Other Long Term Investments EquitySecuritiesWithoutReadilyDeterminableFairValueAndOtherLongTermInvestments	325721000	usd
CY2023Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	473267000	usd
CY2022Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	625774000	usd
CY2023Q4	us-gaap	Assets Assets	10371177000	usd
CY2022Q4	us-gaap	Assets Assets	10393635000	usd
CY2023Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	30000000	usd
CY2022Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	30000000	usd
CY2023Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	105514000	usd
CY2022Q4	us-gaap	Accounts Payable Trade Current AccountsPayableTradeCurrent	133105000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	143449000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	157124000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	671527000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	759759000	usd
CY2023Q4	us-gaap	Liabilities Current LiabilitiesCurrent	950490000	usd
CY2022Q4	us-gaap	Liabilities Current LiabilitiesCurrent	1079988000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1993154000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2019759000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	164612000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	76276000	usd
CY2023Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	474540000	usd
CY2022Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	617843000	usd
CY2023Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	33378000	usd
CY2022Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	27235000	usd
CY2023Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2022Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		usd
CY2023Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	6340312000	usd
CY2022Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	6295080000	usd
CY2023Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	923000	usd
CY2022Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	-265019000	usd
CY2023Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-10942000	usd
CY2022Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-13133000	usd
CY2023Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	4350000	shares
CY2022Q4	us-gaap	Treasury Stock Common Shares TreasuryStockCommonShares	1101000	shares
CY2023Q4	us-gaap	Treasury Stock Value TreasuryStockValue	252441000	usd
CY2022Q4	us-gaap	Treasury Stock Value TreasuryStockValue	85323000	usd
CY2023Q4	us-gaap	Stockholders Equity StockholdersEquity	6077861000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	5931614000	usd
CY2023Q4	us-gaap	Minority Interest MinorityInterest	677142000	usd
CY2022Q4	us-gaap	Minority Interest MinorityInterest	640920000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6755003000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6572534000	usd
CY2023Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	10371177000	usd
CY2022Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	10393635000	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4365235000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5235280000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3699627000	usd
CY2023	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1343254000	usd
CY2022	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1933705000	usd
CY2021	us-gaap	Cost Of Goods And Services Sold CostOfGoodsAndServicesSold	1296282000	usd
CY2023	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1576229000	usd
CY2022	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1914878000	usd
CY2021	us-gaap	Selling And Marketing Expense SellingAndMarketingExpense	1362300000	usd
CY2023	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	891958000	usd
CY2022	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	991983000	usd
CY2021	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	797448000	usd
CY2023	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	334491000	usd
CY2022	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	318028000	usd
CY2021	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	230810000	usd
CY2022	us-gaap	Depreciation Nonproduction DepreciationNonproduction	130986000	usd
CY2021	us-gaap	Depreciation Nonproduction DepreciationNonproduction	75015000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	74839000	usd
CY2023	us-gaap	Interest Expense InterestExpense	157632000	usd
CY2022	us-gaap	Interest Expense InterestExpense	110165000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	367135000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	108818000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-331087000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	258317000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-1195149000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	590816000	usd
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2694000	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-1831000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	3.07
CY2022	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-13.58
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	6.72
CY2023	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.97
CY2022	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-13.58
CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	6.33
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.70
CY2023	us-gaap	Profit Loss ProfitLoss	258317000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	3428000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-18829000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-696000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	0	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	0	usd
CY2023	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-33000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	53000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	-2000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2699000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-18776000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	10464000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	261016000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-1211231000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	599449000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-7625000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-22285000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-8562000	usd
CY2023	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	513000	usd
CY2022	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-1235000	usd
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Noncontrolling Interest OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToNoncontrollingInterest	-93000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-7112000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-23520000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-8655000	usd
CY2023	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	268128000	usd
CY2022	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-1187711000	usd
CY2021	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	608104000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6572534000	usd
CY2023	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	259492000	usd
CY2023	iaci	Other Comprehensive Income Loss Netof Tax Including Portion Attributableto Nonredeemable Noncontrolling Interest Total OtherComprehensiveIncomeLossNetofTaxIncludingPortionAttributabletoNonredeemableNoncontrollingInterestTotal	2699000	usd
CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	121950000	usd
CY2023	iaci	Issuanceof Common Stock Pursuantto Stock Based Awards Netof Withholding Taxes IssuanceofCommonStockPursuanttoStockBasedAwardsNetofWithholdingTaxes	-9814000	usd
CY2023	iaci	Adjustmentof Redeemable Noncontrolling Interestto Fair Value AdjustmentofRedeemableNoncontrollingInteresttoFairValue	7567000	usd
CY2023	iaci	Adjustments To Additional Paid In Capital Adjustment To Liquidation Value AdjustmentsToAdditionalPaidInCapitalAdjustmentToLiquidationValue	0	usd
CY2023	us-gaap	Stockholders Equity Other StockholdersEquityOther	-214000	usd
CY2023Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6755003000	usd
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	7150928000	usd
CY2021	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	587253000	usd
CY2021	iaci	Issuanceof Common Stock Pursuantto Stock Based Awards Netof Withholding Taxes IssuanceofCommonStockPursuanttoStockBasedAwardsNetofWithholdingTaxes	-98691000	usd
CY2021	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	258965000	usd
CY2021	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	570000	usd
CY2021	iaci	Adjustmentof Redeemable Noncontrolling Interestto Fair Value AdjustmentofRedeemableNoncontrollingInteresttoFairValue	777688000	usd
CY2021	iaci	Stock Issued During Period Value Recapitalization Upon A Spin Off StockIssuedDuringPeriodValueRecapitalizationUponASpinOff	0	usd
CY2021	iaci	Additional Paid In Capital Spin Off Of Investment AdditionalPaidInCapitalSpinOffOfInvestment	-386438000	usd
CY2021	iaci	Additional Paid In Capital Elimination Of Noncontrolling Interest AdditionalPaidInCapitalEliminationOfNoncontrollingInterest	1002324000	usd
CY2021	iaci	Adjustments To Additional Paid In Capital Change In Related Party Tax Distribution AdjustmentsToAdditionalPaidInCapitalChangeInRelatedPartyTaxDistribution	7640000	usd
CY2021	us-gaap	Stockholders Equity Other StockholdersEquityOther	-168000	usd
CY2022	iaci	Issuanceof Common Stock Pursuantto Stock Based Awards Netof Withholding Taxes IssuanceofCommonStockPursuanttoStockBasedAwardsNetofWithholdingTaxes	-16905000	usd
CY2022	iaci	Adjustmentof Redeemable Noncontrolling Interestto Fair Value AdjustmentofRedeemableNoncontrollingInteresttoFairValue	24229000	usd
CY2022	iaci	Adjustments To Additional Paid In Capital Adjustment To Liquidation Value AdjustmentsToAdditionalPaidInCapitalAdjustmentToLiquidationValue	54700000	usd
CY2022	iaci	Noncontrolling Interest Decrease From Reorganization Of Subsidiary NoncontrollingInterestDecreaseFromReorganizationOfSubsidiary	255000	usd
CY2022	us-gaap	Stockholders Equity Other StockholdersEquityOther	5241000	usd
CY2022Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6572534000	usd
CY2023	us-gaap	Profit Loss ProfitLoss	258317000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	-1192455000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	588985000	usd
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2694000	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-1831000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	258317000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-1195149000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	590816000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	295970000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	307718000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	74839000	usd
CY2023	us-gaap	Depreciation Depreciation	175096000	usd
CY2022	us-gaap	Depreciation Depreciation	130986000	usd
CY2021	us-gaap	Depreciation Depreciation	75015000	usd
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	117181000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	123476000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	79487000	usd
CY2023	iaci	Operating Lease Non Cash Lease Expense OperatingLeaseNonCashLeaseExpense	101695000	usd
CY2022	iaci	Operating Lease Non Cash Lease Expense OperatingLeaseNonCashLeaseExpense	70922000	usd
CY2021	iaci	Operating Lease Non Cash Lease Expense OperatingLeaseNonCashLeaseExpense	35737000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	88792000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-337758000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	133377000	usd
CY2023	iaci	Accounts Receivable Credit Loss Expense Reversaland Recovery AccountsReceivableCreditLossExpenseReversalandRecovery	87729000	usd
CY2022	iaci	Accounts Receivable Credit Loss Expense Reversaland Recovery AccountsReceivableCreditLossExpenseReversalandRecovery	116553000	usd
CY2021	iaci	Accounts Receivable Credit Loss Expense Reversaland Recovery AccountsReceivableCreditLossExpenseReversalandRecovery	89893000	usd
CY2023	iaci	Long Term Equity Securities And Divestiture Of Business Fvni Gain Loss LongTermEquitySecuritiesAndDivestitureOfBusinessFVNIGainLoss	-19346000	usd
CY2022	iaci	Long Term Equity Securities And Divestiture Of Business Fvni Gain Loss LongTermEquitySecuritiesAndDivestitureOfBusinessFVNIGainLoss	38956000	usd
CY2021	iaci	Long Term Equity Securities And Divestiture Of Business Fvni Gain Loss LongTermEquitySecuritiesAndDivestitureOfBusinessFVNIGainLoss	44835000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	9000000	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	112753000	usd
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2023	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	76000	usd
CY2022	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	209991000	usd
CY2021	us-gaap	Pension And Other Postretirement Benefits Expense Reversal Of Expense Noncash PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash	18212000	usd
CY2023	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	721668000	usd
CY2022	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-723515000	usd
CY2021	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	789283000	usd
CY2023	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-2832000	usd
CY2022	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	62495000	usd
CY2021	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	-104018000	usd
CY2023	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	12315000	usd
CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-17963000	usd
CY2021	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-45302000	usd
CY2023	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	37296000	usd
CY2022	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	66706000	usd
CY2021	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	154887000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-11281000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-8920000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-4185000	usd
CY2023	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-74256000	usd
CY2022	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-63843000	usd
CY2021	us-gaap	Increase Decrease In Operating Lease Liability IncreaseDecreaseInOperatingLeaseLiability	-30995000	usd
CY2023	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-120259000	usd
CY2022	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-247912000	usd
CY2021	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	90265000	usd
CY2023	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	2884000	usd
CY2022	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-6739000	usd
CY2021	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-2506000	usd
CY2023	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-9213000	usd
CY2022	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-11020000	usd
CY2021	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	8296000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	189528000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	-82791000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	118900000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	141364000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	139753000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	90210000	usd
CY2023	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	29805000	usd
CY2022	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	9780000	usd
CY2021	us-gaap	Proceeds From Sale Of Productive Assets ProceedsFromSaleOfProductiveAssets	1221000	usd
CY2023	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	550000000	usd
CY2022	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	0	usd
CY2021	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	225000000	usd
CY2023	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	455413000	usd
CY2022	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	233928000	usd
CY2021	us-gaap	Payments To Acquire Marketable Securities PaymentsToAcquireMarketableSecurities	0	usd
CY2023	iaci	Payment To Acquire Equity Securities Without Readily Determinable Fair Value PaymentToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue	103555000	usd
CY2022	iaci	Payment To Acquire Equity Securities Without Readily Determinable Fair Value PaymentToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue	3036000	usd
CY2021	iaci	Payment To Acquire Equity Securities Without Readily Determinable Fair Value PaymentToAcquireEquitySecuritiesWithoutReadilyDeterminableFairValue	24290000	usd
CY2023	iaci	Proceedsfrom Divestitureof Businessand Saleof Longterm Investments ProceedsfromDivestitureofBusinessandSaleofLongtermInvestments	11861000	usd
CY2022	iaci	Proceedsfrom Divestitureof Businessand Saleof Longterm Investments ProceedsfromDivestitureofBusinessandSaleofLongtermInvestments	90767000	usd
CY2021	iaci	Proceedsfrom Divestitureof Businessand Saleof Longterm Investments ProceedsfromDivestitureofBusinessandSaleofLongtermInvestments	16451000	usd
CY2023	us-gaap	Payments To Acquire Longterm Investments PaymentsToAcquireLongtermInvestments	0	usd
CY2022	us-gaap	Payments To Acquire Longterm Investments PaymentsToAcquireLongtermInvestments	244256000	usd
CY2021	us-gaap	Payments To Acquire Longterm Investments PaymentsToAcquireLongtermInvestments	0	usd
CY2023	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	11297000	usd
CY2022	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	19497000	usd
CY2021	us-gaap	Proceeds From Sale And Collection Of Notes Receivable ProceedsFromSaleAndCollectionOfNotesReceivable	0	usd
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2699643000	usd
CY2023	iaci	Payments Related To Spinoff Of Operating Segment PaymentsRelatedToSpinoffOfOperatingSegment	0	usd
CY2022	iaci	Payments Related To Spinoff Of Operating Segment PaymentsRelatedToSpinoffOfOperatingSegment	0	usd
CY2021	iaci	Payments Related To Spinoff Of Operating Segment PaymentsRelatedToSpinoffOfOperatingSegment	333184000	usd
CY2023	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-9902000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-87467000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-494808000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-2907503000	usd
CY2022	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	30000000	usd
CY2021	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	usd
CY2023	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	1600000000	usd
CY2023	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	usd
CY2022	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	0	usd
CY2021	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	220000000	usd
CY2023	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	usd
CY2022	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	785000	usd
CY2021	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	23548000	usd
CY2023	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	130000	usd
CY2022	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	0	usd
CY2021	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1496000	usd
CY2023	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	usd
CY2021	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	30339000	usd
CY2022	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	4975000	usd
CY2021	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-18578000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-223013000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-112651000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	1115737000	usd
CY2023	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	-120952000	usd
CY2022	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	-690250000	usd
CY2021	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	-1672866000	usd
CY2023	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	usd
CY2022	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	usd
CY2021	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	18053000	usd
CY2023	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0	usd
CY2022	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	0	usd
CY2021	us-gaap	Cash Provided By Used In Investing Activities Discontinued Operations CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations	7602000	usd
CY2023	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	0	usd
CY2022	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	0	usd
CY2021	us-gaap	Cash Provided By Used In Financing Activities Discontinued Operations CashProvidedByUsedInFinancingActivitiesDiscontinuedOperations	293577000	usd
CY2023	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	0	usd
CY2022	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	0	usd
CY2021	us-gaap	Net Cash Provided By Used In Discontinued Operations NetCashProvidedByUsedInDiscontinuedOperations	319232000	usd
CY2023	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1124000	usd
CY2022	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-5545000	usd
CY2021	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	-1612000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-119828000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-695795000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-1355246000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1426069000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2121864000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	3477110000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1306241000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	1426069000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations	2121864000	usd
CY2023	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	152700000	usd
CY2022	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	152000000	usd
CY2023	us-gaap	Nature Of Operations NatureOfOperations	ORGANIZATION<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:107%">Company overview</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">IAC today is comprised of category leading businesses, including Dotdash Meredith, Angi Inc. and Care.com, as well as others ranging from early stage to established businesses.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As used herein, “IAC,” the “Company,” “we,” “our,” “us” and other similar terms refer to IAC Inc. and its subsidiaries (unless the context requires otherwise).</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Dotdash Meredith</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On December 1, 2021, Dotdash Media Inc. (referred to herein as "Dotdash"), a wholly-owned subsidiary of IAC, completed the acquisition of Meredith Holdings Corporation ("Meredith"), the former subsidiary of Meredith Corporation, comprising its digital and magazine businesses and its corporate operations. The parent of the combined entity is Dotdash Meredith, Inc. ("Dotdash Meredith"). See "</span><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline"><a href="#if633dcb4000a4270890bef34bde9bdac_136" style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;text-decoration:underline">Note 4—Business Combination</a></span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">" for a description of the acquisition of Meredith.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Dotdash Meredith is one of the largest digital and print publishers in America. Nearly 200 million people trust us to help them make decisions, take action, and find inspiration. Dotdash Meredith's over 40 iconic brands include PEOPLE, Better Homes & Gardens, Verywell, FOOD & WINE, The Spruce, allrecipes, Byrdie, REAL SIMPLE, Investopedia, and Southern Living.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Dotdash Meredith has two operating segments: (i) Digital, which includes its digital, mobile and licensing operations; and (ii) Print, which includes its magazine subscription and newsstand operations. </span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Angi Inc. </span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Angi Inc. is a publicly traded company that connects quality home service professionals with consumers across more than 500 different categories, from repairing and remodeling homes to cleaning and landscaping. Approximately 196,000 transacting service professionals actively sought consumer matches, completed jobs or advertised work through Angi Inc. platforms during the three months ended December 31, 2023. Additionally, consumers turned to at least one Angi Inc. business to find a service professional for approximately 23 million projects during the year ended December 31, 2023. At December 31, 2023, IAC’s economic interest and voting interest in Angi Inc. were 84.2% and 98.1%, respectively.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%">On November 1, 2023, Angi Inc. completed the sale of 100% of its wholly-owned subsidiary, Total Home Roofing, LLC ("Roofing"), and has reflected it as a discontinued operation in its standalone financial statements. Roofing does not meet the threshold to be reflected as a discontinued operation at the IAC level. During the fourth quarter of 2023, IAC moved Roofing to Emerging & Other and prior period financial information has been recast to conform to the current year presentation. Following IAC's move of Roofing to Emerging & Other, Angi Inc. has three operating segments: (i) Ads and Leads, (ii) Services and (iii) International (includes Europe and Canada), and operates under multiple brands including Angi, HomeAdvisor and Handy. Ads and Leads provides service professionals the capability to engage with potential customers, including quoting and invoicing services, and provides consumers with tools and resources to help them find local, pre-screened and customer-rated service professionals nationwide for home repair, maintenance and improvement projects. Services consumers can request household services directly through the Angi Inc. platform and Angi Inc. fulfills the request through the use of independently established home services providers engaged in a trade, occupation and/or business that customarily provides such services. The matching and pre-priced booking services and related tools and directories are provided to consumers free of charge.</span></div><div style="margin-bottom:12pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:115%">Search</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Search segment consists of Ask Media Group and the Desktop business. Ask Media Group is a collection of websites providing general search services and information. The Desktop business includes our direct-to-consumer downloadable desktop applications and our business-to-business partnership operations. Ask Media Group’s websites include, among others: </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Ask.com</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, a search site with a variety of fresh and contemporary content (celebrities, culture, entertainment, travel and general knowledge); </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Reference.com</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, a search and general knowledge content site that provides content across select vertical categories (history, business and finance and geography, among other verticals); </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Consumersearch.com</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, a search and content website that provides content designed to simplify the product research process; and </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Shopping.net</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, a vertical shopping search site, each of which contains a mix of search services and/or content targeted to various user or segment demographics.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Emerging & Other</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Emerging & Other primarily includes:</span></div><div style="padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%;padding-left:14.5pt">Care.com, a leading online destination for families to connect with caregivers for their children, aging parents, pets and homes and for caregivers to connect with families seeking care services. Care.com's brands include </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:112%">Care For Business</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%">, Care.com offerings to enterprises and </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:112%">HomePay</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%">; </span></div><div><span><br/></span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Mosaic Group, a leading developer and provider of global subscription mobile applications. Mosaic Group has a portfolio of some of the largest and most popular applications in the following verticals: Communications (</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">RoboKiller</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">TapeACall, Trapcall</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">), Language (</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">iTranslate</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Speak & Translate</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">), Weather (</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Clime: </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">NOAA Weather Radar Live, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Weather Live</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">), Business (</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">PDF Hero</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Scan Hero</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">) and Lifestyle</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%"> </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">(</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Blossom</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">, </span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%">Pixomatic</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">); </span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Roofing (previously included within the Angi Inc. segment), a provider of roof replacement and repair services, which was sold on November 1, 2023;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Vivian Health, a platform to efficiently connect healthcare professionals with job opportunities;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">IAC Films, a provider of producer services for feature films, primarily for initial sale and distribution through theatrical releases and video-on-demand services in the United States ("U.S.") and internationally;</span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">The Daily Beast, a website dedicated to news, commentary, culture and entertainment that publishes original reporting and opinion from its roster of full-time journalists and contributors; and </span></div><div style="margin-bottom:12pt;padding-left:36pt;text-indent:-18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">•</span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt">Bluecrew, a technology driven staffing platform exclusively for flexible W-2 work, for periods prior to its sale on November 9, 2022.</span></div><div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Vimeo Spin-off:</span></div><div style="text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%">On May 25, 2021, IAC completed the spin-off of its full stake in Vimeo, Inc. (formerly Vimeo Holdings, Inc. ("Vimeo")) to IAC shareholders (which we refer to as the “Spin-off”). Following the Spin-off, Vimeo became an independent, separately traded public company. Therefore, Vimeo is presented as a discontinued operation within the Company's financial statements for 2021. See "</span><span style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%;text-decoration:underline"><a href="#if633dcb4000a4270890bef34bde9bdac_184" style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%;text-decoration:underline">Note 1</a><a href="#if633dcb4000a4270890bef34bde9bdac_184" style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%;text-decoration:underline">8</a><a href="#if633dcb4000a4270890bef34bde9bdac_184" style="color:#0000ff;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%;text-decoration:underline">—Discontinued Operations</a></span><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:112%">'" for additional details.</span></div>
CY2021	iaci	Contract With Customer Liability Reclassified ContractWithCustomerLiabilityReclassified	7300000	usd
CY2022	iaci	Contract With Customer Liability Increase Decrease For Contract Sold In Disposal Of Business ContractWithCustomerLiabilityIncreaseDecreaseForContractSoldInDisposalOfBusiness	-1100000	usd
CY2021Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	165500000	usd
CY2023	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Accounting Estimates</span></div><div style="margin-bottom:12pt;text-indent:24.75pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Management of the Company is required to make certain estimates, judgments and assumptions during the preparation of its financial statements in accordance with GAAP. These estimates, judgments and assumptions impact the reported amounts of assets, liabilities, revenue and expenses and the related disclosure of assets and liabilities. Actual results could differ from these estimates.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">On an ongoing basis, the Company evaluates its estimates, judgments and assumptions, including those related to: the fair values of cash equivalents and marketable debt and equity securities; the carrying value of accounts receivable, including the determination of the allowance for credit losses; the determination of the customer relationship period for certain costs to obtain a contract with a customer; the recoverability of right-of-use assets ("ROU assets"); the useful lives and recoverability of capitalized software, equipment, buildings and leasehold improvements and definite-lived intangible assets; the recoverability of goodwill and indefinite-lived intangible assets; the fair value of equity securities without readily determinable fair values; the fair value of interest rate swaps; contingencies; the fair value of acquisition-related contingent consideration arrangements; unrecognized tax benefits; the liability for potential refunds and customer credits; the valuation allowance for deferred income tax assets; pension and postretirement benefit expenses, including actuarial assumptions regarding discount rates, expected returns on plan assets, inflation and healthcare costs; and the fair value of and forfeiture rates for stock-based awards, among others. The Company bases its estimates, judgments and assumptions on historical experience, its forecasts and budgets and other factors that the Company considers relevant.</span></div>
CY2023Q4	us-gaap	Capitalized Contract Cost Net Current CapitalizedContractCostNetCurrent	44424000	usd
CY2022Q4	us-gaap	Capitalized Contract Cost Net Current CapitalizedContractCostNetCurrent	47856000	usd
CY2023Q4	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	6058000	usd
CY2022Q4	us-gaap	Capitalized Contract Cost Net Noncurrent CapitalizedContractCostNetNoncurrent	5667000	usd
CY2023Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	50482000	usd
CY2022Q4	us-gaap	Capitalized Contract Cost Net CapitalizedContractCostNet	53523000	usd
CY2023	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	97400000	usd
CY2022	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	95500000	usd
CY2021	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	125900000	usd
CY2023	iaci	Accounts Receivable Periodof Payment Due AccountsReceivablePeriodofPaymentDue	P30D
CY2023Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	143400000	usd
CY2023Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	100000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	157100000	usd
CY2022Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	200000	usd
CY2021Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	400000	usd
CY2023	iaci	Cash Equivalents Maturity Period At Purchase Less Than CashEquivalentsMaturityPeriodAtPurchaseLessThan	P91D
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	149000000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	235100000	usd
CY2023	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:107%">Services Agreement with Google (the "Services Agreement")</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company and Google are parties to an amended Services Agreement, which automatically renewed effective March 31, 2023 and now expires on March 31, 2025. The Company earns certain other advertising revenue from Google that is not attributable to the Services Agreement. A meaningful portion of the Company’s net cash from operating activities that it can freely access is attributable to revenue earned pursuant to the Services Agreement and other revenue earned from Google.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Services Agreement requires that the Company comply with certain guidelines promulgated by Google. Google may generally unilaterally update its policies and guidelines without advance notice. These updates may be specific to the Services Agreement or could be more general and thereby impact the Company as well as other companies. These policy and guideline updates have in the past and could in the future require modifications to, or prohibit and/or render obsolete certain of our products, services and/or business practices, which have been and could be costly to address or negatively impact revenue and have had and in the future could have an adverse effect on our financial condition and results of operations. As described below, Google has made changes to the policies under the Services Agreement and has also made industry-wide changes that have negatively impacted the Desktop business-to-consumer (“B2C”) business. Google may make changes in the future that could impact the revenue earned from Google, including under the Services Agreement.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">As a result of certain industry-wide policy changes combined with increased enforcement by Google of policies under the Services Agreement in prior periods, the Company discontinued the introduction of new products in 2021. Therefore, the current B2C revenue stream relates solely to the then existing installed base of products. As a result, the revenue and profits of the B2C business have declined significantly and the Company expects that trend to continue.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:107%">Credit Risk</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company has counterparty credit risk exposure to the private limited life insurance company, which issued the annuity contracts held by the IPC Pension Scheme ("IPC Plan"), as well as certain financial institutions that are counterparties to the interest rate swaps. In addition, cash and cash equivalents are maintained with financial institutions and are in excess of any applicable third-party insurance limits, such as the Federal Deposit Insurance Corporation and the Securities Investor Protection Corporation.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Interest Rate Risk</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">At December 31, 2023, the principal amount of the Company's outstanding debt totals $1.5 billion, which bears interest at a variable rate. In March 2023, the Company entered into interest rate swaps on the Dotdash Meredith Term Loan B for a total notional amount of $350 million. See “Interest Rate Swaps” above for additional information. During the year ended December 31, 2023, adjusted term secured overnight financing rate ("Adjusted Term SOFR") increased an average of approximately 133 basis points relative to December 31, 2022. As a result of the increase in the Adjusted Term SOFR during the year ended December 31, 2023, the interest expense, net of $3.7 million realized gains related to the $350 million in notional amount of interest rate swaps, was $13.1 million higher as compared to what interest expense would have been if the Adjusted Term SOFR had been unchanged during 2023. At December 31, 2023, the outstanding balance of $1.2 billion related to the Dotdash Meredith Term Loan B bore interest at Adjusted SOFR, subject to a minimum of 0.50%, plus 4.00%, or 9.44%, and the outstanding balance of $315.0 million related to the Dotdash Meredith Term Loan A bore interest at Adjusted Term SOFR plus 2.25%, or 7.69%. If Adjusted Term SOFR were to increase or decrease by 100 basis points, the annual interest expense on the Dotdash Meredith Term Loan A and Dotdash Meredith Term Loan B, net of the impact related to the $350 million in notional amount of interest rate swaps, would increase or decrease by $11.9 million.</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Other Risks</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company is subject to certain risks and concentrations including dependence on third-party technology providers and exposure to risks associated with online commerce security.</span></div>
CY2023Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	148971000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	27000	usd
CY2023Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	0	usd
CY2023Q4	iaci	Carrying Amount Of Goodwill For Which Excess Of Fair Value Over Carrying Value Is Less Than20 CarryingAmountOfGoodwillForWhichExcessOfFairValueOverCarryingValueIsLessThan20	1600000000	usd
CY2023Q3	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	7600000	usd
CY2023Q4	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	79900000	usd
CY2023Q4	iaci	Carrying Amount Of Indefinite Lived Intangible Assets For Which Excess Of Fair Value Over Carrying Value Is Less Than20 CarryingAmountOfIndefiniteLivedIntangibleAssetsForWhichExcessOfFairValueOverCarryingValueIsLessThan20	303700000	usd
CY2023	us-gaap	Advertising Expense AdvertisingExpense	858100000	usd
CY2022	us-gaap	Advertising Expense AdvertisingExpense	1000000000	usd
CY2021	us-gaap	Advertising Expense AdvertisingExpense	877000000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	148998000	usd
CY2021	iaci	Putand Call Arrangements Exercised PutandCallArrangementsExercised	2	arrangement
CY2023	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:12pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%">Reclassifications</span></div><div style="margin-bottom:12pt;text-indent:22.5pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Certain prior year amounts have been reclassified to conform to the current year presentation.</span></div>
CY2023Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	0	usd
CY2022Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	4317000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	148998000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities Current AvailableForSaleSecuritiesDebtSecuritiesCurrent	235056000	usd
CY2023Q4	us-gaap	Short Term Investments ShortTermInvestments	148998000	usd
CY2022Q4	us-gaap	Short Term Investments ShortTermInvestments	239373000	usd
CY2023Q4	iaci	Number Of Investments In Marketable Equity Securities NumberOfInvestmentsInMarketableEquitySecurities	0	investment
CY2022Q4	iaci	Number Of Investments In Marketable Equity Securities NumberOfInvestmentsInMarketableEquitySecurities	2	investment
CY2023	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-300000	usd
CY2022	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-20300000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	234987000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	75000	usd
CY2022Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	6000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	235056000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	usd
CY2023Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2891850000	usd
CY2022Q4	us-gaap	Equity Method Investments EquityMethodInvestments	2170182000	usd
CY2023Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	404848000	usd
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	323530000	usd
CY2023Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	6368000	usd
CY2022Q4	us-gaap	Other Long Term Investments OtherLongTermInvestments	2191000	usd
CY2023Q4	iaci	Equity Securities Without Readily Determinable Fair Value And Other Long Term Investments EquitySecuritiesWithoutReadilyDeterminableFairValueAndOtherLongTermInvestments	411216000	usd
CY2022Q4	iaci	Equity Securities Without Readily Determinable Fair Value And Other Long Term Investments EquitySecuritiesWithoutReadilyDeterminableFairValueAndOtherLongTermInvestments	325721000	usd
CY2023	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	2227000	usd
CY2022	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	8245000	usd
CY2023	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount	22463000	usd
CY2022	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount	97382000	usd
CY2023	iaci	Equity Securitieswithout Readily Determinable Fair Value Annual Amount EquitySecuritieswithoutReadilyDeterminableFairValueAnnualAmount	-20236000	usd
CY2022	iaci	Equity Securitieswithout Readily Determinable Fair Value Annual Amount EquitySecuritieswithoutReadilyDeterminableFairValueAnnualAmount	-89137000	usd
CY2023Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	37800000	usd
CY2023Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentCumulativeAmount	126100000	usd
CY2023	iaci	Equity Securities Without Readily Determinable Fair Value Realized Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueRealizedGainLoss	89000	usd
CY2022	iaci	Equity Securities Without Readily Determinable Fair Value Realized Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueRealizedGainLoss	12434000	usd
CY2021	iaci	Equity Securities Without Readily Determinable Fair Value Realized Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueRealizedGainLoss	5773000	usd
CY2023	iaci	Equity Securities Without Readily Determinable Fair Value Unrealized Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueUnrealizedGainLoss	-20236000	usd
CY2022	iaci	Equity Securities Without Readily Determinable Fair Value Unrealized Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueUnrealizedGainLoss	-89137000	usd
CY2021	iaci	Equity Securities Without Readily Determinable Fair Value Unrealized Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueUnrealizedGainLoss	8892000	usd
CY2023	iaci	Equity Securities Without Readily Determinable Fair Value Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueGainLoss	-20147000	usd
CY2022	iaci	Equity Securities Without Readily Determinable Fair Value Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueGainLoss	-76703000	usd
CY2021	iaci	Equity Securities Without Readily Determinable Fair Value Gain Loss EquitySecuritiesWithoutReadilyDeterminableFairValueGainLoss	14665000	usd
CY2023Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	148998000	usd
CY2023Q4	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	2891851000	usd
CY2023Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	4108077000	usd
CY2022Q4	us-gaap	Investments Fair Value Disclosure InvestmentsFairValueDisclosure	4317000	usd
CY2022Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	235056000	usd
CY2022Q4	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	2170182000	usd
CY2022Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	3472420000	usd
CY2021Q3	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-15000000	usd
CY2021	iaci	Finite Lived Intangible Assets Purchase Accounting Adjustments Accelerated Amortization Recognized FiniteLivedIntangibleAssetsPurchaseAccountingAdjustmentsAcceleratedAmortizationRecognized	135900000	usd
CY2021	iaci	Business Combination Acquisition Related Costs Adjustment BusinessCombinationAcquisitionRelatedCostsAdjustment	-130800000	usd
CY2021	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	5599334000	usd
CY2021	us-gaap	Business Acquisitions Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax	650189000	usd
CY2021	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Basic BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareBasic	7.39
CY2021	us-gaap	Business Acquisition Pro Forma Income Loss From Continuing Operations Before Changes In Accounting And Extraordinary Items Net Of Tax Per Share Diluted BusinessAcquisitionProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTaxPerShareDiluted	6.95
CY2021	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	656920000	usd
CY2021	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	7.36
CY2021	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	6.93
CY2023Q4	us-gaap	Goodwill Goodwill	3024266000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	3030168000	usd
CY2023Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	544228000	usd
CY2022Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	631097000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	330477000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	538944000	usd
CY2023Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	3898971000	usd
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	4200209000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	3030168000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	9000000	usd
CY2023	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	3098000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	3024266000	usd
CY2023Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	1275385000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	3226610000	usd
CY2022	iaci	Goodwill Deductions During Period GoodwillDeductionsDuringPeriod	77420000	usd
CY2022	us-gaap	Goodwill Transfers GoodwillTransfers	0	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	112753000	usd
CY2022	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-6269000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	3030168000	usd
CY2022Q4	us-gaap	Goodwill Impaired Accumulated Impairment Loss GoodwillImpairedAccumulatedImpairmentLoss	1292390000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	967122000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	636645000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	330477000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P5Y1M6D
CY2022Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	1121007000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	582063000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	538944000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P4Y8M12D
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	133662000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	84475000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	69057000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	15142000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	5519000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	22622000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	330477000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	299597000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	428160000	usd
CY2023Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	68126000	usd
CY2022Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	67192000	usd
CY2023Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	401118000	usd
CY2022Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	518851000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	469244000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	586043000	usd
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	113905000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	70397000	usd
CY2021	us-gaap	Operating Lease Cost OperatingLeaseCost	44071000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	19846000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	16694000	usd
CY2021	us-gaap	Variable Lease Cost VariableLeaseCost	9902000	usd
CY2023	us-gaap	Lease Cost LeaseCost	133751000	usd
CY2022	us-gaap	Lease Cost LeaseCost	87091000	usd
CY2021	us-gaap	Lease Cost LeaseCost	53973000	usd
CY2023	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	48900000	usd
CY2022	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	2300000	usd
CY2021	us-gaap	Operating Lease Impairment Loss OperatingLeaseImpairmentLoss	10500000	usd
CY2023	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1600000	usd
CY2022	us-gaap	Short Term Lease Cost ShortTermLeaseCost	4000000	usd
CY2021	us-gaap	Short Term Lease Cost ShortTermLeaseCost	1400000	usd
CY2023	us-gaap	Sublease Income SubleaseIncome	15200000	usd
CY2022	us-gaap	Sublease Income SubleaseIncome	17100000	usd
CY2021	us-gaap	Sublease Income SubleaseIncome	6700000	usd
CY2023	us-gaap	Gain Loss On Termination Of Lease GainLossOnTerminationOfLease	-200000	usd
CY2022	us-gaap	Gain Loss On Termination Of Lease GainLossOnTerminationOfLease	3300000	usd
CY2021	us-gaap	Gain Loss On Termination Of Lease GainLossOnTerminationOfLease	-100000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	89626000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	81500000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	76461000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	63097000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	59013000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	194120000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	563817000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	94573000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	469244000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P7Y6M
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P11Y4M24D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0507
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0522
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	7545000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	9608000	usd
CY2021	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	421153000	usd
CY2023	iaci	Operating Lease Liability Derecognition OperatingLeaseLiabilityDerecognition	34809000	usd
CY2022	iaci	Operating Lease Liability Derecognition OperatingLeaseLiabilityDerecognition	4612000	usd
CY2021	iaci	Operating Lease Liability Derecognition OperatingLeaseLiabilityDerecognition	1854000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	100328000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	93864000	usd
CY2021	us-gaap	Operating Lease Payments OperatingLeasePayments	44659000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1993154000	usd
CY2022Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	2019759000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	30000000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	47500000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	275000000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	12500000	usd
CY2023Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	1675000000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	2040000000	usd
CY2023Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	30000000	usd
CY2023Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	4470000	usd
CY2023Q4	us-gaap	Deferred Finance Costs Gross DeferredFinanceCostsGross	12376000	usd
CY2023Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1993154000	usd
CY2023	iaci	Percentage Of Directors Elected By Holders Of Common Stock PercentageOfDirectorsElectedByHoldersOfCommonStock	0.25
CY2023	iaci	Percentage Of Directors Elected By Holders Of Common Stock PercentageOfDirectorsElectedByHoldersOfCommonStock	0.25
CY2020Q2	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	8000000	shares
CY2023	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	3200000	shares
CY2022	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1100000	shares
CY2023	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	51.00
CY2022	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	77.44
CY2023	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	165600000	usd
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	85300000	usd
CY2023Q4	us-gaap	Stock Repurchase Program Number Of Shares Authorized To Be Repurchased StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased	3700000	shares
CY2021Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	0	usd
CY2023	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	4365235000	usd
CY2022	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	5235280000	usd
CY2021	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	3699627000	usd
CY2023	us-gaap	Revenues Revenues	4365235000	usd
CY2022	us-gaap	Revenues Revenues	5235280000	usd
CY2021	us-gaap	Revenues Revenues	3699627000	usd
CY2023Q4	us-gaap	Noncurrent Assets NoncurrentAssets	754878000	usd
CY2022Q4	us-gaap	Noncurrent Assets NoncurrentAssets	938774000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	-260763000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	-474771000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	-137067000	usd
CY2023	iaci	Adjusted Ebitda AdjustedEBITDA	336484000	usd
CY2022	iaci	Adjusted Ebitda AdjustedEBITDA	199550000	usd
CY2021	iaci	Adjusted Ebitda AdjustedEBITDA	107266000	usd
CY2023	us-gaap	Operating Income Loss OperatingIncomeLoss	-260763000	usd
CY2023	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	117181000	usd
CY2023	us-gaap	Depreciation Depreciation	175096000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	295970000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	9000000	usd
CY2023	iaci	Adjusted Ebitda AdjustedEBITDA	336484000	usd
CY2023	us-gaap	Interest Expense InterestExpense	157632000	usd
CY2023	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	721668000	usd
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	63862000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	367135000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	108818000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	258317000	usd
CY2023	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-7625000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	265942000	usd
CY2022	us-gaap	Operating Income Loss OperatingIncomeLoss	-474771000	usd
CY2022	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	123476000	usd
CY2022	us-gaap	Depreciation Depreciation	130986000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	307718000	usd
CY2022	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	-612000	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	112753000	usd
CY2022	iaci	Adjusted Ebitda AdjustedEBITDA	199550000	usd
CY2022	us-gaap	Interest Expense InterestExpense	110165000	usd
CY2022	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	-723515000	usd
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-217785000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1526236000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-331087000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-1195149000	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2694000	usd
CY2022	us-gaap	Profit Loss ProfitLoss	-1192455000	usd
CY2022	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-22285000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	-1170170000	usd
CY2021	us-gaap	Operating Income Loss OperatingIncomeLoss	-137067000	usd
CY2021	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	79487000	usd
CY2021	us-gaap	Depreciation Depreciation	75015000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	74839000	usd
CY2021	us-gaap	Business Combination Contingent Consideration Arrangements Change In Amount Of Contingent Consideration Liability1 BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1	14992000	usd
CY2021	iaci	Adjusted Ebitda AdjustedEBITDA	107266000	usd
CY2021	us-gaap	Interest Expense InterestExpense	34264000	usd
CY2021	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	789283000	usd
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	111854000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	729806000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	138990000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	590816000	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-1831000	usd
CY2021	us-gaap	Profit Loss ProfitLoss	588985000	usd
CY2021	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-8562000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	597547000	usd
CY2023	us-gaap	Segment Expenditure Addition To Long Lived Assets SegmentExpenditureAdditionToLongLivedAssets	141364000	usd
CY2022	us-gaap	Segment Expenditure Addition To Long Lived Assets SegmentExpenditureAdditionToLongLivedAssets	139753000	usd
CY2021	us-gaap	Segment Expenditure Addition To Long Lived Assets SegmentExpenditureAdditionToLongLivedAssets	90210000	usd
CY2022	us-gaap	Restructuring Charges RestructuringCharges	80200000	usd
CY2022Q4	us-gaap	Restructuring Reserve RestructuringReserve	27394000	usd
CY2023	iaci	Restructuring Charges Net RestructuringChargesNet	3674000	usd
CY2023	us-gaap	Restructuring Reserve Accrual Adjustment1 RestructuringReserveAccrualAdjustment1	-4199000	usd
CY2023	us-gaap	Payments For Restructuring PaymentsForRestructuring	24979000	usd
CY2023Q4	us-gaap	Restructuring Reserve RestructuringReserve	1890000	usd
CY2023	us-gaap	Restructuring Charges RestructuringCharges	79713000	usd
CY2022	iaci	Restructuring Charges Net RestructuringChargesNet	80238000	usd
CY2022	us-gaap	Payments For Restructuring PaymentsForRestructuring	31110000	usd
CY2022	us-gaap	Restructuring Reserve Settled Without Cash2 RestructuringReserveSettledWithoutCash2	21734000	usd
CY2022Q4	us-gaap	Restructuring Reserve RestructuringReserve	27394000	usd
CY2022	us-gaap	Asset Impairment Charges AssetImpairmentCharges	21300000	usd
CY2022	us-gaap	Impairment Of Leasehold ImpairmentOfLeasehold	7000000	usd
CY2023	us-gaap	Inventory Write Down InventoryWriteDown	400000	usd
CY2023	us-gaap	Restructuring Costs RestructuringCosts	-525000	usd
CY2022	us-gaap	Restructuring Costs RestructuringCosts	80238000	usd
CY2023	iaci	Share Based Compensation Arrangement By Share Based Payment Award Number Of Active Plans ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfActivePlans	1	plan
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	31000000	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2822000	shares
CY2022Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.05
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod	0	shares
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice	0
CY2023	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	252000	shares
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.23
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	0	shares
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	0
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	0	shares
CY2023	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	0
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	2570000	shares
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.23
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P1Y10M24D
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	98053000	usd
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2570000	shares
CY2023Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	14.23
CY2023	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1	P1Y10M24D
CY2023Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	98053000	usd
CY2023	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	11300000	usd
CY2022	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	3400000	usd
CY2021	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	135100000	usd
CY2023	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	9554000	usd
CY2023Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Outstanding Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions	2570000	shares
CY2023	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2	P1Y10M24D
CY2023Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Outstanding Options Weighted Average Exercise Price Beginning Balance1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1	14.23
CY2023Q4	us-gaap	Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Exercisable Options ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions	2570000	shares
CY2023	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Remaining Contractual Term2 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2	P1Y10M24D
CY2023Q4	us-gaap	Sharebased Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Exercisable Options Weighted Average Exercise Price1 SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1	14.23
CY2023Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	269600000	usd
CY2023	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y10M24D
CY2023	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	17200000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	20000000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	101800000	usd
CY2023	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	4000000	usd
CY2022	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	1700000	usd
CY2021	us-gaap	Employee Service Share Based Compensation Tax Benefit From Exercise Of Stock Options EmployeeServiceShareBasedCompensationTaxBenefitFromExerciseOfStockOptions	81000000	usd
CY2023	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Weighted Average Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostWeightedAverageInterestCreditingRate	0.0239
CY2022	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Weighted Average Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostWeightedAverageInterestCreditingRate	0.0365
CY2021	us-gaap	Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Weighted Average Interest Crediting Rate DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostWeightedAverageInterestCreditingRate	0.0204
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	353188000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-1320332000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	758538000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	13947000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-205904000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-28732000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	367135000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-1526236000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	729806000	usd
CY2023	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1474000	usd
CY2022	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	777000	usd
CY2021	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-5818000	usd
CY2023	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	8998000	usd
CY2022	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4712000	usd
CY2021	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4751000	usd
CY2022	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1182000	usd
CY2021	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	6680000	usd
CY2023	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	20026000	usd
CY2022	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	6671000	usd
CY2021	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	5613000	usd
CY2023	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	79941000	usd
CY2022	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-252022000	usd
CY2021	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	111755000	usd
CY2023	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	9153000	usd
CY2022	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-44335000	usd
CY2021	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	18063000	usd
CY2023	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-302000	usd
CY2022	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-41401000	usd
CY2021	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	3559000	usd
CY2023	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	88792000	usd
CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-337758000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	133377000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	108818000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-331087000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	138990000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	435318000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	458603000	usd
CY2023Q4	iaci	Deferred Tax Assets Lease Liabilities Noncurrent DeferredTaxAssetsLeaseLiabilitiesNoncurrent	112178000	usd
CY2022Q4	iaci	Deferred Tax Assets Lease Liabilities Noncurrent DeferredTaxAssetsLeaseLiabilitiesNoncurrent	137869000	usd
CY2023Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	91550000	usd
CY2022Q4	us-gaap	Deferred Tax Assets In Process Research And Development DeferredTaxAssetsInProcessResearchAndDevelopment	74179000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	72369000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	64903000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	53551000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	58697000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	101356000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	104948000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	866322000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	899199000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	132058000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	124012000	usd
CY2023Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	734264000	usd
CY2022Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	775187000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	383170000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	212390000	usd
CY2023Q4	iaci	Deferred Tax Liabilities Investment In Subsidiaries DeferredTaxLiabilitiesInvestmentInSubsidiaries	226898000	usd
CY2022Q4	iaci	Deferred Tax Liabilities Investment In Subsidiaries DeferredTaxLiabilitiesInvestmentInSubsidiaries	225375000	usd
CY2023Q4	iaci	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets And Other DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssetsAndOther	174933000	usd
CY2022Q4	iaci	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets And Other DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssetsAndOther	219856000	usd
CY2023Q4	iaci	Deferred Tax Liabilities Right Of Use Assets DeferredTaxLiabilitiesRightOfUseAssets	71531000	usd
CY2022Q4	iaci	Deferred Tax Liabilities Right Of Use Assets DeferredTaxLiabilitiesRightOfUseAssets	100643000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	13639000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	46740000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	27029000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	44922000	usd
CY2023Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	897200000	usd
CY2022Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	849926000	usd
CY2023Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	162936000	usd
CY2022Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	74739000	usd
CY2023	iaci	Income Tax Expense Benefit Related To Operating Loss Carryforwards IncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-1500000	usd
CY2023Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	91900000	usd
CY2023	iaci	Tax Credit Carryforwards Not Subject To Expiration TaxCreditCarryforwardsNotSubjectToExpiration	14000000	usd
CY2023	iaci	Tax Credit Carryforward Amount Expiring Within Ten Years TaxCreditCarryforwardAmountExpiringWithinTenYears	77900000	usd
CY2023	us-gaap	Valuation Allowance Deferred Tax Asset Change In Amount ValuationAllowanceDeferredTaxAssetChangeInAmount	8000000	usd
CY2023Q4	iaci	Deferred Tax Assets Valuation Allowance Amount DeferredTaxAssetsValuationAllowanceAmount	132100000	usd
CY2023	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	77098000	usd
CY2022	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-320510000	usd
CY2021	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	153259000	usd
CY2023	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	12542000	usd
CY2022	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-26708000	usd
CY2021	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	24289000	usd
CY2023	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	11973000	usd
CY2022	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	19041000	usd
CY2021	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	5094000	usd
CY2023	iaci	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	10383000	usd
CY2022	iaci	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	12359000	usd
CY2021	iaci	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	22358000	usd
CY2023	iaci	Effective Income Tax Rate Reconciliation Stock Based Compensation EffectiveIncomeTaxRateReconciliationStockBasedCompensation	-2357000	usd
CY2022	iaci	Effective Income Tax Rate Reconciliation Stock Based Compensation EffectiveIncomeTaxRateReconciliationStockBasedCompensation	2155000	usd
CY2021	iaci	Effective Income Tax Rate Reconciliation Stock Based Compensation EffectiveIncomeTaxRateReconciliationStockBasedCompensation	91729000	usd
CY2023	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	1659000	usd
CY2022	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	15764000	usd
CY2021	us-gaap	Income Tax Reconciliation Nondeductible Expense Impairment Losses IncomeTaxReconciliationNondeductibleExpenseImpairmentLosses	0	usd
CY2023	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	407000	usd
CY2022	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-7152000	usd
CY2021	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	4049000	usd
CY2023	iaci	Effective Income Tax Reconciliation Adjustment To Beginning Of Year Valuation Allowance Amount EffectiveIncomeTaxReconciliationAdjustmentToBeginningOfYearValuationAllowanceAmount	-240000	usd
CY2022	iaci	Effective Income Tax Reconciliation Adjustment To Beginning Of Year Valuation Allowance Amount EffectiveIncomeTaxReconciliationAdjustmentToBeginningOfYearValuationAllowanceAmount	3523000	usd
CY2021	iaci	Effective Income Tax Reconciliation Adjustment To Beginning Of Year Valuation Allowance Amount EffectiveIncomeTaxReconciliationAdjustmentToBeginningOfYearValuationAllowanceAmount	20248000	usd
CY2023	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	16585000	usd
CY2022	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	12833000	usd
CY2021	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	11610000	usd
CY2023	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	108818000	usd
CY2022	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-331087000	usd
CY2021	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	138990000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16013000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	17449000	usd
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18233000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	5187000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	5557000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2855000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	2505000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	7100000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	1427000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1008000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1715000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	3420000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	701000	usd
CY2022	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1608000	usd
CY2021	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	1116000	usd
CY2023	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	usd
CY2022	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	usd
CY2021	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	4516000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	19002000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	16013000	usd
CY2021Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	17449000	usd
CY2023Q4	us-gaap	Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority IncomeTaxExaminationLiabilityRefundAdjustmentFromSettlementWithTaxingAuthority	2500000	usd
CY2023Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	19600000	usd
CY2022Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	16600000	usd
CY2023	iaci	Unrecognized Tax Benefits Including Income Tax Penalties And Interest Accrued Reduction Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsIncludingIncomeTaxPenaltiesAndInterestAccruedReductionResultingFromLapseOfApplicableStatuteOfLimitations	3000000	usd
CY2023Q4	iaci	Unrecognized Tax Benefits Unrelated To Federal Income Taxes Statute Of Limitations Expiring To Be Recognized In Subsequent Periods That Would Income Impact Tax Expense Continuing Operations UnrecognizedTaxBenefitsUnrelatedToFederalIncomeTaxesStatuteOfLimitationsExpiringToBeRecognizedInSubsequentPeriodsThatWouldIncomeImpactTaxExpenseContinuingOperations	18600000	usd
CY2022Q4	iaci	Unrecognized Tax Benefits Unrelated To Federal Income Taxes Statute Of Limitations Expiring To Be Recognized In Subsequent Periods That Would Income Impact Tax Expense Continuing Operations UnrecognizedTaxBenefitsUnrelatedToFederalIncomeTaxesStatuteOfLimitationsExpiringToBeRecognizedInSubsequentPeriodsThatWouldIncomeImpactTaxExpenseContinuingOperations	15400000	usd
CY2023Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	400000	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2700000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	258317000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-1195149000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	590816000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-7625000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-22285000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-8748000	usd
CY2023	us-gaap	Undistributed Continuing Operation Earnings Loss Allocation To Participating Securities Basic UndistributedContinuingOperationEarningsLossAllocationToParticipatingSecuritiesBasic	9216000	usd
CY2022	us-gaap	Undistributed Continuing Operation Earnings Loss Allocation To Participating Securities Basic UndistributedContinuingOperationEarningsLossAllocationToParticipatingSecuritiesBasic	0	usd
CY2021	us-gaap	Undistributed Continuing Operation Earnings Loss Allocation To Participating Securities Basic UndistributedContinuingOperationEarningsLossAllocationToParticipatingSecuritiesBasic	20160000	usd
CY2023	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Basic NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic	256726000	usd
CY2022	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Basic NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic	-1172864000	usd
CY2021	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Basic NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersBasic	579404000	usd
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2694000	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-1831000	usd
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	0	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	0	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	186000	usd
CY2023	us-gaap	Undistributed Discontinued Operation Earnings Loss Allocation To Participating Securities Basic UndistributedDiscontinuedOperationEarningsLossAllocationToParticipatingSecuritiesBasic	0	usd
CY2022	us-gaap	Undistributed Discontinued Operation Earnings Loss Allocation To Participating Securities Basic UndistributedDiscontinuedOperationEarningsLossAllocationToParticipatingSecuritiesBasic	0	usd
CY2021	us-gaap	Undistributed Discontinued Operation Earnings Loss Allocation To Participating Securities Basic UndistributedDiscontinuedOperationEarningsLossAllocationToParticipatingSecuritiesBasic	-68000	usd
CY2023	us-gaap	Net Income Loss From Discontinued Operations Available To Common Shareholders Basic NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic	0	usd
CY2022	us-gaap	Net Income Loss From Discontinued Operations Available To Common Shareholders Basic NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic	2694000	usd
CY2021	us-gaap	Net Income Loss From Discontinued Operations Available To Common Shareholders Basic NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersBasic	-1949000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	256726000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-1170170000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	577455000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83569000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86350000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86222000	shares
CY2023	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	3.07
CY2022	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	-13.58
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	6.72
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.03
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.02
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.07
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-13.55
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	6.70
CY2023	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	258317000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	-1195149000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	590816000	usd
CY2023	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-7625000	usd
CY2022	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-22285000	usd
CY2021	us-gaap	Income Loss From Continuing Operations Attributable To Noncontrolling Entity IncomeLossFromContinuingOperationsAttributableToNoncontrollingEntity	-8748000	usd
CY2023	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	8918000	usd
CY2022	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	usd
CY2021	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	18981000	usd
CY2023	us-gaap	Dilutive Securities DilutiveSecurities	0	usd
CY2022	us-gaap	Dilutive Securities DilutiveSecurities	0	usd
CY2021	us-gaap	Dilutive Securities DilutiveSecurities	406000	usd
CY2023	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Diluted NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted	257024000	usd
CY2022	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Diluted NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted	-1172864000	usd
CY2021	us-gaap	Net Income Loss From Continuing Operations Available To Common Shareholders Diluted NetIncomeLossFromContinuingOperationsAvailableToCommonShareholdersDiluted	580989000	usd
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	0	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	2694000	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax IncomeLossFromDiscontinuedOperationsNetOfTax	-1831000	usd
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	0	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	0	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Noncontrolling Interest IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToNoncontrollingInterest	186000	usd
CY2023	us-gaap	Undistributed Discontinued Operation Earnings Loss Allocation To Participating Securities Diluted UndistributedDiscontinuedOperationEarningsLossAllocationToParticipatingSecuritiesDiluted	0	usd
CY2022	us-gaap	Undistributed Discontinued Operation Earnings Loss Allocation To Participating Securities Diluted UndistributedDiscontinuedOperationEarningsLossAllocationToParticipatingSecuritiesDiluted	0	usd
CY2021	us-gaap	Undistributed Discontinued Operation Earnings Loss Allocation To Participating Securities Diluted UndistributedDiscontinuedOperationEarningsLossAllocationToParticipatingSecuritiesDiluted	-64000	usd
CY2023	us-gaap	Net Income Loss From Discontinued Operations Available To Common Shareholders Diluted NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted	0	usd
CY2022	us-gaap	Net Income Loss From Discontinued Operations Available To Common Shareholders Diluted NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted	2694000	usd
CY2021	us-gaap	Net Income Loss From Discontinued Operations Available To Common Shareholders Diluted NetIncomeLossFromDiscontinuedOperationsAvailableToCommonShareholdersDiluted	-1953000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	257024000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-1170170000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	579036000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83569000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86350000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86222000	shares
CY2023	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	2895000	shares
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	0	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	5606000	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	86464000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	86350000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	91828000	shares
CY2023	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	2.97
CY2022	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	-13.58
CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	6.33
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.03
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	-0.02
CY2023	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.97
CY2022	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-13.55
CY2021	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	6.31
CY2023	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3600000	shares
CY2021	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	3000000	shares
CY2022	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	7900000	shares
CY2023Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1297445000	usd
CY2022Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1417390000	usd
CY2021Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2118730000	usd
CY2020Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	3366176000	usd
CY2023Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	8539000	usd
CY2022Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	1165000	usd
CY2021Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	1941000	usd
CY2020Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	448000	usd
CY2023Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	257000	usd
CY2022Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	7514000	usd
CY2021Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	1193000	usd
CY2020Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	449000	usd
CY2023Q4	us-gaap	Disposal Group Including Discontinued Operation Cash And Cash Equivalents DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents	0	usd
CY2022Q4	us-gaap	Disposal Group Including Discontinued Operation Cash And Cash Equivalents DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents	0	usd
CY2021Q4	us-gaap	Disposal Group Including Discontinued Operation Cash And Cash Equivalents DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents	0	usd
CY2020Q4	us-gaap	Disposal Group Including Discontinued Operation Cash And Cash Equivalents DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents	110037000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1306241000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1426069000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	2121864000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	3477110000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	50971000	usd
CY2021Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	36637000	usd
CY2023	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	87729000	usd
CY2022	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	116553000	usd
CY2023	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	104764000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	107188000	usd
CY2023	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	5227000	usd
CY2022	us-gaap	Allowance For Doubtful Accounts Receivable Recoveries AllowanceForDoubtfulAccountsReceivableRecoveries	5367000	usd
CY2023	us-gaap	Accounts Receivable Sale AccountsReceivableSale	6958000	usd
CY2022	us-gaap	Accounts Receivable Sale AccountsReceivableSale	0	usd
CY2023	iaci	Accounts Receivable Allowance For Credit Loss Other AccountsReceivableAllowanceForCreditLossOther	174000	usd
CY2022	iaci	Accounts Receivable Allowance For Credit Loss Other AccountsReceivableAllowanceForCreditLossOther	-398000	usd
CY2023Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	32379000	usd
CY2022Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	50971000	usd
CY2023Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	91118000	usd
CY2022Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	80039000	usd
CY2023Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	166381000	usd
CY2022Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	216524000	usd
CY2023Q4	us-gaap	Other Assets Current OtherAssetsCurrent	257499000	usd
CY2022Q4	us-gaap	Other Assets Current OtherAssetsCurrent	296563000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	829537000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	785087000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	374256000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	274473000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	455281000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	510614000	usd
CY2023Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	180384000	usd
CY2022Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	169227000	usd
CY2023Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	118522000	usd
CY2022Q4	us-gaap	Contract With Customer Refund Liability Current ContractWithCustomerRefundLiabilityCurrent	125441000	usd
CY2023Q4	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	56055000	usd
CY2022Q4	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	78601000	usd
CY2023Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	316566000	usd
CY2022Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	386490000	usd
CY2023Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	671527000	usd
CY2022Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	759759000	usd
CY2023	us-gaap	Interest Income Other InterestIncomeOther	71114000	usd
CY2022	us-gaap	Interest Income Other InterestIncomeOther	24916000	usd
CY2021	us-gaap	Interest Income Other InterestIncomeOther	1351000	usd
CY2023	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	2832000	usd
CY2022	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-62495000	usd
CY2021	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	104018000	usd
CY2023	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1528000	usd
CY2022	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-8503000	usd
CY2021	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-13636000	usd
CY2023	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	-139000	usd
CY2022	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	206422000	usd
CY2021	us-gaap	Net Periodic Defined Benefits Expense Reversal Of Expense Excluding Service Cost Component NetPeriodicDefinedBenefitsExpenseReversalOfExpenseExcludingServiceCostComponent	17858000	usd
CY2023	iaci	Gain Loss On Disposition Of Business Investments And Upward Downward Adjustment On Equity Securities Without Readily Determinable Fair Value GainLossOnDispositionOfBusinessInvestmentsAndUpwardDownwardAdjustmentOnEquitySecuritiesWithoutReadilyDeterminableFairValue	-19201000	usd
CY2022	iaci	Gain Loss On Disposition Of Business Investments And Upward Downward Adjustment On Equity Securities Without Readily Determinable Fair Value GainLossOnDispositionOfBusinessInvestmentsAndUpwardDownwardAdjustmentOnEquitySecuritiesWithoutReadilyDeterminableFairValue	59299000	usd
CY2021	iaci	Gain Loss On Disposition Of Business Investments And Upward Downward Adjustment On Equity Securities Without Readily Determinable Fair Value GainLossOnDispositionOfBusinessInvestmentsAndUpwardDownwardAdjustmentOnEquitySecuritiesWithoutReadilyDeterminableFairValue	18874000	usd
CY2023	iaci	Unrealized Gain Loss On Investment Following Initial Public Offering UnrealizedGainLossOnInvestmentFollowingInitialPublicOffering	-145000	usd
CY2022	iaci	Unrealized Gain Loss On Investment Following Initial Public Offering UnrealizedGainLossOnInvestmentFollowingInitialPublicOffering	-20342000	usd
CY2021	iaci	Unrealized Gain Loss On Investment Following Initial Public Offering UnrealizedGainLossOnInvestmentFollowingInitialPublicOffering	18788000	usd
CY2023	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	usd
CY2022	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	0	usd
CY2021	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	7174000	usd
CY2023	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2022	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	usd
CY2021	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-1110000	usd
CY2023	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	7595000	usd
CY2022	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-4238000	usd
CY2021	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-5747000	usd
CY2023	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	63862000	usd
CY2022	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-217785000	usd
CY2021	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	111854000	usd
CY2021	iaci	Foreign Currency Transaction Gain Loss Liquidation Of Foreign Subsidiaries ForeignCurrencyTransactionGainLossLiquidationOfForeignSubsidiaries	-10000000	usd
CY2023	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	1700000	usd
CY2022	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-213400000	usd
CY2021	us-gaap	Defined Benefit Plan Amortization Of Gains Losses DefinedBenefitPlanAmortizationOfGainsLosses	-7100000	usd
CY2023	iaci	Equity Securities Without Readily Determinable Fair Value Net Upward Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueNetUpwardDownwardPriceAdjustmentAnnualAmount	-20200000	usd
CY2022	iaci	Equity Securities Without Readily Determinable Fair Value Net Upward Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueNetUpwardDownwardPriceAdjustmentAnnualAmount	-89100000	usd
CY2021	iaci	Equity Securities Without Readily Determinable Fair Value Net Upward Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueNetUpwardDownwardPriceAdjustmentAnnualAmount	8900000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	156172000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	98150000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	21702000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	18782000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	16407000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	9880000	usd
CY2023	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	1667000	usd
CY2022	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	3004000	usd
CY2021	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	1762000	usd
CY2023	iaci	Proceeds From Derivative Instrument Interest ProceedsFromDerivativeInstrumentInterest	3200000	usd
CY2023Q4	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2023Q4	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false
CY2023Q4	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2023	dei	Auditor Firm AuditorFirmId	42

Files In Submission

Name	View Source	Status
0001800227-24-000011-index-headers.html	Edgar Link	pending
0001800227-24-000011-index.html	Edgar Link	pending
0001800227-24-000011.txt	Edgar Link	pending
0001800227-24-000011-xbrl.zip	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
iac-ex1024_googleservicesa.htm	Edgar Link	pending
iac-ex1025_amno3togoogleag.htm	Edgar Link	pending
iac-ex1026_amno4togoogleag.htm	Edgar Link	pending
iac-ex107_formofnoticeandt.htm	Edgar Link	pending
iac-ex211_listofiacsubsidi.htm	Edgar Link	pending
iac-ex231_consentofey.htm	Edgar Link	pending
iac-ex232_consentofdeloitt.htm	Edgar Link	pending
iac-ex311_20231231.htm	Edgar Link	pending
iac-ex312_20231231.htm	Edgar Link	pending
iac-ex313_20231231.htm	Edgar Link	pending
iac-ex321_20231231.htm	Edgar Link	pending
iac-ex322_20231231.htm	Edgar Link	pending
iac-ex323_20231231.htm	Edgar Link	pending
iac-ex971_iacincclawbackpo.htm	Edgar Link	pending
iaci-20231231.htm	Edgar Link	pending
iaci-20231231.xsd	Edgar Link	pending
iaci-20231231_g1.jpg	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R100.htm	Edgar Link	pending
R101.htm	Edgar Link	pending
R102.htm	Edgar Link	pending
R103.htm	Edgar Link	pending
R104.htm	Edgar Link	pending
R105.htm	Edgar Link	pending
R106.htm	Edgar Link	pending
R107.htm	Edgar Link	pending
R108.htm	Edgar Link	pending
R109.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R110.htm	Edgar Link	pending
R111.htm	Edgar Link	pending
R112.htm	Edgar Link	pending
R113.htm	Edgar Link	pending
R114.htm	Edgar Link	pending
R115.htm	Edgar Link	pending
R116.htm	Edgar Link	pending
R117.htm	Edgar Link	pending
iaci-20231231_cal.xml	Edgar Link	unprocessable
iaci-20231231_def.xml	Edgar Link	unprocessable
iaci-20231231_lab.xml	Edgar Link	unprocessable
iaci-20231231_pre.xml	Edgar Link	unprocessable
iaci-20231231_htm.xml	Edgar Link	completed
R118.htm	Edgar Link	pending
R119.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R120.htm	Edgar Link	pending
R121.htm	Edgar Link	pending
R122.htm	Edgar Link	pending
R123.htm	Edgar Link	pending
R124.htm	Edgar Link	pending
R125.htm	Edgar Link	pending
R126.htm	Edgar Link	pending
R127.htm	Edgar Link	pending
R128.htm	Edgar Link	pending
R129.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R130.htm	Edgar Link	pending
R131.htm	Edgar Link	pending
R132.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
R92.htm	Edgar Link	pending
R93.htm	Edgar Link	pending
R94.htm	Edgar Link	pending
R95.htm	Edgar Link	pending
R96.htm	Edgar Link	pending
R97.htm	Edgar Link	pending
R98.htm	Edgar Link	pending
R99.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$IAC
IAC Inc. Stock $iac

2023 Q4 Form 10-K Financial Statement

#000180022724000011 Filed on February 29, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IAC IAC Inc. Stock $iac

2023 Q4 Form 10-K Financial Statement

#000180022724000011 Filed on February 29, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IAC
IAC Inc. Stock $iac