$IAC
IAC Inc. Stock $iac

$iac Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 8-K Financial Statement

#000180022720000017 Filed on October 05, 2020

Income Statement

Concept	2018 Q4	2018 Q3	2018 Q2
Revenue	$646.8M	$660.6M	$637.9M
YoY Change	-31.96%	-20.25%	-16.87%
Cost Of Revenue	$142.5M	$129.7M	$120.9M
YoY Change	-28.64%	-21.99%	-13.03%
Gross Profit	$504.2M	$530.9M	$517.0M
YoY Change	-32.85%	-19.81%	-17.72%
Gross Profit Margin	77.97%	80.36%	81.05%
Selling, General & Admin	-$53.50M	$577.7M	$558.0M
YoY Change	-109.77%	-1.84%	18.65%
% of Gross Profit	-10.61%	108.81%	107.92%
Research & Development	-$52.80M	$77.70M	$75.40M
YoY Change	-175.43%	10.06%	36.1%
% of Gross Profit	-10.47%	14.63%	14.58%
Depreciation & Amortization	$32.20M	$39.10M	$38.90M
YoY Change	-16.8%	80.18%	44.61%
% of Gross Profit	6.39%	7.36%	7.52%
Operating Expenses	-$74.10M	$694.6M	$672.5M
YoY Change	-111.29%	2.04%	21.65%
Operating Profit	-$11.47M	$39.18M	$24.48M
YoY Change	-112.15%	-310.63%	-67.62%
Interest Expense	$68.40M	-$27.60M	-$27.40M
YoY Change	-322.8%	10.4%	10.93%
% of Operating Profit		-70.45%	-111.93%
Other Income/Expense, Net	$108.2M	$8.100M	$171.1M
YoY Change	-1372.94%	-179.41%	1577.45%
Pretax Income	-$218.8M	$153.3M	$312.2M
YoY Change	-497.1%	-384.94%	410.97%
Income Tax	$19.90M	-$9.000M	$31.40M
% Of Pretax Income		-5.87%	10.06%
Net Earnings	$94.73M	$38.16M	$164.5M
YoY Change	188.8%	-78.75%	148.09%
Net Earnings / Revenue	14.65%	5.78%	25.78%
Basic Earnings Per Share
Diluted Earnings Per Share	-$2.680M	$1.585M	$2.403M
COMMON SHARES
Basic Shares Outstanding
Diluted Shares Outstanding

Balance Sheet

Concept	2018 Q4	2018 Q3	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments	$2.255B	$1.880B	$1.765B
YoY Change	37.84%	49.8%	14.83%
Cash & Equivalents	$884.0M	$1.671B	$1.645B
Short-Term Investments	$124.0M	$209.0M	$120.0M
Other Short-Term Assets	$167.5M	$246.0M	$238.0M
YoY Change	-9.48%	23.0%	-7.03%
Inventory
Prepaid Expenses	$36.64M
Receivables	$180.1M	$347.0M	$344.0M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$1.258B	$2.473B	$2.347B
YoY Change	-40.8%	43.2%	16.59%
LONG-TERM ASSETS
Property, Plant & Equipment	$260.4M	$308.0M	$307.0M
YoY Change	-17.32%	-3.75%	0.33%
Goodwill	$1.407B
YoY Change	7.11%
Intangibles	$393.8M
YoY Change
Long-Term Investments	$0.00	$218.0M	$217.0M
YoY Change	-100.0%	80.17%	77.87%
Other Assets	$109.9M	$177.0M	$150.0M
YoY Change	-21.49%	-16.11%	85.19%
Total Long-Term Assets	$2.474B	$3.899B	$3.888B
YoY Change	-33.9%	2.23%	40.21%
TOTAL ASSETS
Total Short-Term Assets	$1.258B	$2.473B	$2.347B
Total Long-Term Assets	$2.474B	$3.899B	$3.888B
Total Assets	$3.732B	$6.372B	$6.235B
YoY Change	-36.4%	15.0%	30.28%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$75.00M	$76.00M	$79.00M
YoY Change	-2.6%	-27.62%	19.7%
Accrued Expenses	$299.6M	$422.0M	$378.0M
YoY Change	-18.37%	9.04%	11.5%
Deferred Revenue	$83.30M
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$13.75M	$14.00M	$14.00M
YoY Change	-1.79%
Total Short-Term Liabilities	$527.5M	$894.0M	$846.0M
YoY Change	-34.07%	6.94%	23.68%
LONG-TERM LIABILITIES
Long-Term Debt	$245.0M	$1.984B	$1.982B
YoY Change	-87.62%	20.32%	26.0%
Other Long-Term Liabilities	$62.98M	$62.00M	$59.00M
YoY Change	-1.6%	-11.43%	-13.24%
Total Long-Term Liabilities	$307.9M	$2.046B	$2.041B
YoY Change	-84.93%	19.02%	24.38%
TOTAL LIABILITIES
Total Short-Term Liabilities	$527.5M	$894.0M	$846.0M
Total Long-Term Liabilities	$307.9M	$2.046B	$2.041B
Total Liabilities	$835.4M	$3.772B	$3.659B
YoY Change	-75.7%	21.21%	29.71%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$2.284B	$2.600B	$2.576B
YoY Change
Total Liabilities & Shareholders Equity	$3.732B	$6.372B	$6.235B
YoY Change	-36.4%	15.0%	30.28%

Cashflow Statement

Concept	2018 Q4	2018 Q3	2018 Q2
OPERATING ACTIVITIES
Net Income	$94.73M	$38.16M	$164.5M
YoY Change	188.8%	-78.75%	148.09%
Depreciation, Depletion And Amortization	$32.20M	$39.10M	$38.90M
YoY Change	-16.8%	80.18%	44.61%
Cash From Operating Activities	-$302.3M	$291.9M	$227.8M
YoY Change	-354.25%	108.35%	153.39%
INVESTING ACTIVITIES
Capital Expenditures	$5.400M	-$20.40M	-$24.90M
YoY Change	-128.42%	38.78%	-18.63%
Acquisitions
YoY Change
Other Investing Activities	$223.4M	-$87.40M	-$95.90M
YoY Change	-1205.94%	2719.35%	-338.56%
Cash From Investing Activities	$228.9M	-$108.0M	-$120.7M
YoY Change	-683.93%	503.35%	-1370.53%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	162.2M	-157.2M	-119.5M
YoY Change	-45.18%	-59.99%	1767.19%
NET CHANGE
Cash From Operating Activities	-302.3M	291.9M	227.8M
Cash From Investing Activities	228.9M	-108.0M	-120.7M
Cash From Financing Activities	162.2M	-157.2M	-119.5M
Net Change In Cash	88.80M	26.70M	-12.40M
YoY Change	-76.36%	-109.86%	-113.33%
FREE CASH FLOW
Cash From Operating Activities	-$302.3M	$291.9M	$227.8M
Capital Expenditures	$5.400M	-$20.40M	-$24.90M
Free Cash Flow	-$307.7M	$312.3M	$252.7M
YoY Change	-323.13%	101.74%	109.71%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020Q4	dei	Amendment Flag AmendmentFlag	false
CY2020Q4	dei	Document Type DocumentType	8-K
CY2020Q4	dei	Document Period End Date DocumentPeriodEndDate	2020-10-05
CY2020Q4	dei	Entity Registrant Name EntityRegistrantName	IAC/INTERACTIVECORP
CY2020Q4	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020Q4	dei	Entity File Number EntityFileNumber	001-39356
CY2020Q4	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	84-3727412
CY2020Q4	dei	Entity Address Address Line1 EntityAddressAddressLine1	555 West 18th Street,
CY2020Q4	dei	Entity Address City Or Town EntityAddressCityOrTown	New York,
CY2020Q4	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2020Q4	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10011
CY2020Q4	dei	City Area Code CityAreaCode	212
CY2020Q4	dei	Local Phone Number LocalPhoneNumber	314-7300
CY2020Q4	dei	Written Communications WrittenCommunications	false
CY2020Q4	dei	Soliciting Material SolicitingMaterial	false
CY2020Q4	dei	Pre Commencement Tender Offer PreCommencementTenderOffer	false
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CY2020Q4	dei	Security12b Title Security12bTitle	Common Stock, par value $0.001
CY2020Q4	dei	Trading Symbol TradingSymbol	IAC
CY2020Q4	dei	Security Exchange Name SecurityExchangeName	NASDAQ
CY2020Q4	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	23230000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	241746000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	51373000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1250920000	USD
CY2017	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	21166000	USD
CY2017	iaci	Other Comprehensive Income Loss Netof Tax Including Portion Attributableto Nonredeemable Noncontrolling Interest Total OtherComprehensiveIncomeLossNetofTaxIncludingPortionAttributabletoNonredeemableNoncontrollingInterestTotal	14908000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	189988000	USD
CY2017	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	848000	USD
CY2017	iaci	Temporary Equity Changein Redemption Value TemporaryEquityChangeinRedemptionValue	-6448000	USD
CY2017	us-gaap	Noncontrolling Interest Increase From Business Combination NoncontrollingInterestIncreaseFromBusinessCombination	779471000	USD
CY2017	iaci	Issuanceof Common Stock Pursuantto Stock Based Awards Netof Withholding Taxes IssuanceofCommonStockPursuanttoStockBasedAwardsNetofWithholdingTaxes	-8493000	USD
CY2017	iaci	Net Increase Decrease In Parent Investment In Holdings Company NetIncreaseDecreaseInParentInvestmentInHoldingsCompany	14784000	USD
CY2017	us-gaap	Stockholders Equity Other StockholdersEquityOther	-872000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2256320000	USD
CY2018	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	258583000	USD
CY2018	iaci	Other Comprehensive Income Loss Netof Tax Including Portion Attributableto Nonredeemable Noncontrolling Interest Total OtherComprehensiveIncomeLossNetofTaxIncludingPortionAttributabletoNonredeemableNoncontrollingInterestTotal	-5859000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	147267000	USD
CY2018	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	1236000	USD
CY2018	iaci	Temporary Equity Changein Redemption Value TemporaryEquityChangeinRedemptionValue	-6640000	USD
CY2018	iaci	Issuanceof Common Stock Pursuantto Stock Based Awards Netof Withholding Taxes IssuanceofCommonStockPursuanttoStockBasedAwardsNetofWithholdingTaxes	140706000	USD
CY2018	iaci	Net Increase Decrease In Parent Investment In Holdings Company NetIncreaseDecreaseInParentInvestmentInHoldingsCompany	-145461000	USD
CY2018	us-gaap	Stockholders Equity Other StockholdersEquityOther	-383000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	2684400000	USD
CY2019	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	29015000	USD
CY2019	iaci	Other Comprehensive Income Loss Netof Tax Including Portion Attributableto Nonredeemable Noncontrolling Interest Total OtherComprehensiveIncomeLossNetofTaxIncludingPortionAttributabletoNonredeemableNoncontrollingInterestTotal	269000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	131708000	USD
CY2019	iaci	Temporary Equity Changein Redemption Value TemporaryEquityChangeinRedemptionValue	-11554000	USD
CY2019	iaci	Issuanceof Common Stock Pursuantto Stock Based Awards Netof Withholding Taxes IssuanceofCommonStockPursuanttoStockBasedAwardsNetofWithholdingTaxes	-34722000	USD
CY2019	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	57949000	USD
CY2019	iaci	Net Increase Decrease In Parent Investment In Holdings Company NetIncreaseDecreaseInParentInvestmentInHoldingsCompany	263979000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3005146000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	32183000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	292371000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest	24608000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	134338000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	148405000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	192005000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	83868000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	107081000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	39150000	USD
CY2019	us-gaap	Depreciation Depreciation	55949000	USD
CY2018	us-gaap	Depreciation Depreciation	42393000	USD
CY2017	us-gaap	Depreciation Depreciation	40816000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	65723000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	48362000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	28460000	USD
CY2019	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	3318000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2017	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-62770000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	8765000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-126735000	USD
CY2019	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	41385000	USD
CY2018	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	153429000	USD
CY2017	us-gaap	Unrealized Gain Loss On Investments UnrealizedGainLossOnInvestments	25797000	USD
CY2019	iaci	Gain Losson Dispositionof Businessand Investments GainLossonDispositionofBusinessandInvestments	-8239000	USD
CY2018	iaci	Gain Losson Dispositionof Businessand Investments GainLossonDispositionofBusinessandInvestments	121312000	USD
CY2017	iaci	Gain Losson Dispositionof Businessand Investments GainLossonDispositionofBusinessandInvestments	-70000	USD
CY2019	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-6085000	USD
CY2018	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-2410000	USD
CY2017	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-19180000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	73574000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	52131000	USD
CY2017	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	62205000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-10605000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	29802000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-17867000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	889000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	35611000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	35000000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-4142000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	196000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	4302000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-7358000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	28136000	USD
CY2018	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	36409000	USD
CY2017	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	4498000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	251800000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	369435000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	140417000	USD
CY2019	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	201967000	USD
CY2018	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	65632000	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	146273000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	97898000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	54680000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	46153000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Marketable Securities ProceedsFromSaleAndMaturityOfMarketableSecurities	25000000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	59671000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	0	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	164828000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	136311000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	28561000	USD
CY2019	us-gaap	Payments To Acquire Longterm Investments PaymentsToAcquireLongtermInvestments	253663000	USD
CY2018	us-gaap	Payments To Acquire Longterm Investments PaymentsToAcquireLongtermInvestments	49180000	USD
CY2017	us-gaap	Payments To Acquire Longterm Investments PaymentsToAcquireLongtermInvestments	29000	USD
CY2019	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	54828000	USD
CY2018	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	0	USD
CY2017	us-gaap	Payments To Fund Longterm Loans To Related Parties PaymentsToFundLongtermLoansToRelatedParties	0	USD
CY2019	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	3340000	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-13170000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2857000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-421868000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-44682000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-161037000	USD
CY2017	us-gaap	Proceeds From Issuance Of Medium Term Notes ProceedsFromIssuanceOfMediumTermNotes	275000000	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	13750000	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	13750000	USD
CY2017	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	USD
CY2019	us-gaap	Proceeds From Related Party Debt ProceedsFromRelatedPartyDebt	0	USD
CY2018	us-gaap	Proceeds From Related Party Debt ProceedsFromRelatedPartyDebt	2500000	USD
CY2017	us-gaap	Proceeds From Related Party Debt ProceedsFromRelatedPartyDebt	0	USD
CY2019	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	2500000	USD
CY2018	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	0	USD
CY2017	us-gaap	Repayments Of Related Party Debt RepaymentsOfRelatedPartyDebt	0	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3709000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3803000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	56905000	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2019	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	573000	USD
CY2018	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	4693000	USD
CY2017	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans Including Stock Options ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlansIncludingStockOptions	1653000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	35284000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	29844000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	10113000	USD
CY2019	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	27534000	USD
CY2018	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	12518000	USD
CY2017	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	19748000	USD
CY2019	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2018	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	0	USD
CY2017	us-gaap	Payment For Contingent Consideration Liability Financing Activities PaymentForContingentConsiderationLiabilityFinancingActivities	3860000	USD
CY2019	iaci	Transfers From To Parent Company TransfersFromToParentCompany	263281000	USD
CY2018	iaci	Transfers From To Parent Company TransfersFromToParentCompany	-144069000	USD
CY2017	iaci	Transfers From To Parent Company TransfersFromToParentCompany	8015000	USD
CY2019	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-3795000	USD
CY2018	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-1041000	USD
CY2017	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-340000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	124086000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-197738000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	246804000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	-45982000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	127015000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Excluding Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect	226184000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-122000	USD
CY2018	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	-118000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1587000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-46104000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	126897000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	227771000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	886836000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	759939000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	532168000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	840732000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	886836000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	759939000	USD
CY2019	us-gaap	Nature Of Operations NatureOfOperations	ORGANIZATION AND BASIS OF PRESENTATION<div style="margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Separation</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%;">On December 19, 2019, IAC/InterActiveCorp (“Old IAC”) entered into a Transaction Agreement (the “Transaction Agreement”) with Match Group, Inc., a Delaware corporation in which Old IAC owns a majority equity stake (“Match”), IAC Holdings, Inc., a Delaware corporation and a direct wholly owned subsidiary of Old IAC (“New IAC”), and Valentine Merger Sub LLC, a Delaware limited liability company and an indirect wholly owned subsidiary of Old IAC. Subject to the terms and conditions set forth in the Transaction Agreement, the businesses of Match will be separated from the remaining businesses of Old IAC through a series of transactions that will result in the pre‑transaction stockholders of Old IAC owning shares in two, separate public companies—(1) Old IAC, which will be renamed “Match Group, Inc.” and which will own the businesses of Match and certain IAC financing subsidiaries (and which we refer to as “New Match”), and (2) New IAC, which will be renamed “IAC/InterActiveCorp” and which will own Old IAC’s other businesses—and the pre‑transaction stockholders of Match (other than Old IAC) owning shares in New Match. Completion of the Separation, which is expected to occur in the second quarter of 2020, is subject to the satisfaction (or, to the extent permitted by law, waiver) of a number of conditions. We refer to this transaction as the “Separation". On June 30, 2020, the Separation was completed.</span></div><div><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Basis of Presentation and Combination</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">In connection with the Separation, IAC Holdings, Inc. was incorporated as a Delaware corporation in November 2019. IAC Holdings, Inc. currently does not have any material assets or liabilities, nor does it engage in any business or other activities and, other than in connection with the Separation, will not acquire or incur any material assets or liabilities, nor will it engage in any business or other activities.</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">The historical combined financial statements of IAC Holdings, Inc. and subsidiaries have been prepared on a standalone basis and are derived from the consolidated financial statements and accounting records of Old IAC. The combined financial statements reflect the historical financial position, results of operations and cash flows of the businesses comprising New IAC since their respective dates of acquisition by Old IAC and the allocation to New IAC of certain Old IAC corporate expenses relating to New IAC based on the historical financial statements and accounting records of Old IAC. For the purpose of these financial statements, income taxes have been computed as if the entities comprising New IAC filed tax returns on a standalone, separate basis. The financial statements have been prepared on a combined, rather than consolidated, basis as the final steps of the legal reorganization, which will result in the contribution of all the entities that will comprise New IAC as of the date of the Separation, are not yet complete.</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">As used herein, "New IAC," "we," "our" or "us" and similar terms in these historical combined financial statements refer to IAC Holdings, Inc. and its subsidiaries (unless the context requires otherwise).</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">New IAC prepares its combined financial statements in accordance with U.S. generally accepted accounting principles ("GAAP").</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">All intercompany transactions and balances between and among New IAC, its subsidiaries and the entities comprising New IAC have been eliminated. All intercompany transactions between (i) New IAC and (ii) Old IAC and its subsidiaries are considered to be effectively settled for cash at the time the transaction is recorded. The total net effect of the settlement of these intercompany transactions is reflected in the combined statement of cash flows as a financing activity and in the combined balance sheet as “Invested capital.”</span></div><div style="text-indent:24.75pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">In management's opinion, the assumptions underlying the historical combined financial statements of New IAC, including the basis on which the expenses have been allocated from Old IAC, are reasonable. However, the allocations may not reflect the expenses that we may have incurred as an independent, stand-alone company for the periods presented.</span></div><div style="margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Company overview</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">New IAC operates Vimeo and Dotdash, among many other online businesses, and also has majority ownership of ANGI Homeservices, which includes HomeAdvisor, Angie’s List and Handy.</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">ANGI Homeservices</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Our ANGI Homeservices segment includes the North American (United States and Canada) and European businesses and operations of ANGI Homeservices Inc. ("ANGI"). On September 29, 2017, New IAC's HomeAdvisor business and Angie's List Inc. ("Angie's List") combined under a new publicly traded company called ANGI Homeservices Inc. (the "Combination"). At December 31, 2019, New IAC's economic interest and voting interest in ANGI were 84.1% and 98.1%, respectively.</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">ANGI Homeservices Inc. connects quality home service professionals across 500 different categories, from repairing and remodeling to cleaning and landscaping, with consumers. Over 250,000 domestic service professionals find work through ANGI and consumers turn to at least one of our brands to find a professional for more than 25 million projects each year. ANGI has established category-transforming products with brands such as HomeAdvisor, Angie’s List, Handy and Fixd Repair.</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">On January 25, 2019, ANGI completed the acquisition of Fixd Repair, a home warranty and service company. On October 19, 2018, ANGI acquired Handy, a leading platform in the United States for connecting individuals looking for household services (primarily cleaning and handyman services) with top-quality, pre-screened independent service professionals. ANGI also owns and operates mHelpDesk, a provider of cloud-based field service software for small to mid-size businesses. Prior to its sale on December 31, 2018, ANGI also operated Felix, a pay-per-call advertising service business. In addition to its market-leading U.S. operations, ANGI owns leading home services online marketplaces in France (Travaux), Germany (MyHammer), Netherlands (Werkspot), United Kingdom (MyBuilder Limited or "MyBuilder," which we acquired a controlling interest in on March 24, 2017), Canada (HomeStars Inc. or "HomeStars," which we acquired a controlling interest in on February 8, 2017) and Italy (Instapro), as well as operations in Austria (MyHammer).</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Vimeo</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Vimeo operates a global video platform for creative professionals, small and medium businesses ("SMBs"), organizations and enterprises to connect with their audiences, customers and employees. Vimeo provides cloud-based Software-as-a-Service ("SaaS") offerings that allow customers to create, host, stream, monetize, analyze and distribute videos online and across devices. Vimeo also sold live streaming accessories through its hardware business, which was sold on March 29, 2019.</span></div><div style="text-indent:18pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">On May 28, 2019, Vimeo completed the acquisition of Magisto, a video creation service enabling consumers and businesses to create short-form videos.</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Dotdash</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Dotdash is a portfolio of digital publishing brands providing expert information and inspiration in select vertical content categories.</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Search</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Our Search segment consists of our Desktop business and Ask Media Group. Through our Desktop business, we are a leading provider of global, advertising-driven desktop applications. We own and operate a portfolio of desktop browser applications that provide users with access to a wide variety of online content, tools and services. We provide users who download our desktop browser applications with new tab search services, as well as the option of default browser search services. We distribute our desktop browser applications to consumers free of charge on an opt-in basis directly through direct to consumer (primarily Chrome Web Store) and partnership distribution channels. Ask Media Group is a collection of websites providing general search services, and to a lesser extent, content that help users find the information they need.</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Emerging & Other</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Our Emerging & Other segment primarily includes:</span></div><div style="text-indent:-18pt;padding-left:36pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);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 provider of global subscription mobile applications. Mosaic Group's products are developed by the following owned and operated businesses:</span></div><div style="text-indent:-18pt;padding-left:72pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">◦</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.46pt;">Apalon, a leading mobile development company with one of the largest and most popular application portfolios worldwide. </span></div><div style="text-indent:-18pt;padding-left:72pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">◦</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.46pt;">iTranslate, a developer and distributor of some of the world's most downloaded mobile translation applications, enabling users to read, write, speak and learn foreign languages anywhere in the world, acquired in March 2018. </span></div><div style="text-indent:-18pt;padding-left:72pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">◦</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.46pt;">TelTech, a developer and distributor of unique and innovative mobile communications applications that help protect consumer privacy, acquired in October 2018. </span></div><div style="text-indent:-18pt;padding-left:72pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">◦</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.46pt;">Daily Burn, a health and fitness business that provides streaming fitness and workout videos across a variety of platforms (including mobile, web and other Internet-enabled television platforms).</span></div><div style="text-indent:-18pt;padding-left:36pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);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, which we acquired a controlling interest in on February 26, 2018;</span></div><div style="text-indent:-18pt;padding-left:36pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt;">NurseFly, a platform to efficiently connect healthcare professionals with job opportunities, which we acquired a controlling interest in on June 26, 2019;</span></div><div style="text-indent:-18pt;padding-left:36pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);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;</span></div><div style="text-indent:-18pt;padding-left:36pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt;">College Humor Media, a provider of digital content, including its subscription only property, Dropout.tv; </span></div><div style="text-indent:-18pt;padding-left:36pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);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 production and producer services for feature films, primarily for initial sale and distribution through theatrical releases and video-on-demand services in the United States and internationally; and </span></div><div style="text-indent:-18pt;padding-left:36pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">•</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.5pt;">For periods prior to their sales:</span></div><div style="text-indent:-18pt;padding-left:72pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">◦</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.46pt;">CityGrid, an advertising network that integrated local content and advertising for distribution to affiliated and third-party publishers across web and mobile platforms, sold December 31, 2018.</span></div><div style="text-indent:-18pt;padding-left:72pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">◦</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.46pt;">Dictionary.com, an online and mobile dictionary and thesaurus service, sold November 13, 2018.</span></div><div style="text-indent:-18pt;padding-left:72pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">◦</span><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;padding-left:14.46pt;">Electus, including Notional, a provider of production and producer services for both unscripted and scripted television and digital content, primarily for initial sale and distribution in the United States, sold October 29, 2018.</span></div>
CY2019	iaci	Numberof Service Categories NumberofServiceCategories	500	service_category
CY2019Q4	iaci	Numberof Service Professionals NumberofServiceProfessionals	250000	service_professional
CY2019Q4	iaci	Numberof Projects NumberofProjects	25000000	project
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	0	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	0	USD
CY2019	us-gaap	Use Of Estimates UseOfEstimates	<div style="margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Accounting Estimates</span></div><div style="text-indent:24.75pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Management of New IAC is required to make certain estimates, judgments and assumptions during the preparation of its combined 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 contingent assets and liabilities. Actual results could differ from these estimates.</span></div><div style="text-indent:24.75pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">On an ongoing basis, New IAC evaluates its estimates and judgments, including those related to: the fair values of cash equivalents and marketable debt securities; the carrying value of accounts receivable, including the determination of the allowance for doubtful accounts; the determination of revenue reserves; the carrying value of right-of-use assets ("ROU assets"); the useful lives and recoverability of definite-lived intangible assets and property and equipment; the recoverability of goodwill and indefinite-lived intangible assets; the fair value of equity securities without readily determinable fair values; contingencies; the fair value of acquisition-related contingent consideration arrangements; unrecognized tax benefits; the valuation allowance for deferred income tax assets; and the fair value of and forfeiture rates for stock-based awards, among others. New IAC bases its estimates and judgments on historical experience, its forecasts and budgets and other factors that New IAC considers relevant.</span></div>
CY2019	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	99800000	USD
CY2018	us-gaap	Capitalized Contract Cost Amortization CapitalizedContractCostAmortization	70600000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	43100000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	40600000	USD
CY2018Q1	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	30900000	USD
CY2019Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	6200000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	4500000	USD
CY2018Q1	us-gaap	Contract With Customer Asset Net Noncurrent ContractWithCustomerAssetNetNoncurrent	4700000	USD
CY2019	iaci	Accounts Receivable Periodof Payment Due AccountsReceivablePeriodofPaymentDue	P30D
CY2019Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	179900000	USD
CY2018Q4	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	151800000	USD
CY2018Q1	us-gaap	Contract With Customer Liability ContractWithCustomerLiability	133900000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	146500000	USD
CY2018	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	131900000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	178600000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	150100000	USD
CY2019Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	1300000	USD
CY2018Q4	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	1700000	USD
CY2019	iaci	Cash Equivalents Maturity Period At Purchase Less Than CashEquivalentsMaturityPeriodAtPurchaseLessThan	P91D
CY2019	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Certain Risks and Concentrations</span></div><div style="text-indent:24.75pt;"><span style="background-color:rgb(255,255,255, 0.0);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</span></div><div style="text-indent:24.75pt;"><span><br/></span></div><div style="text-indent:24.75pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%;">Old IAC and Google are party to a services agreement (the “Services Agreement”). If the Separation is consummated, Old IAC shall assign the Services Agreement to New IAC. A meaningful portion of New IAC's revenue is attributable to the Services Agreement. In addition, New IAC earns certain other advertising revenue from Google that is not attributable to the Services Agreement. For the years ended December 31, 2019, 2018 and 2017, total revenue earned from Google was $733.5 million, $825.2 million and $740.7 million, respectively, representing 27%, 33% and 38%, respectively, of New IAC's combined revenue. Accounts receivable related to revenue earned from Google totaled $53.0 million and $69.1 million at December 31, 2019 and 2018, respectively.</span></div><div style="text-indent:24.75pt;"><span><br/></span></div><div style="text-indent:24.75pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Revenue attributable to the Services Agreement is earned by the Desktop business and Ask Media Group within the Search segment. For the years ended December 31, 2019, 2018 and 2017, revenue earned from the Services Agreement was $291.1 million, $426.5 million and $480.6 million, respectively, within the Desktop business and $385.9 million, $339.0 million and $203.5 million, respectively, within Ask Media Group.</span></div><div style="text-indent:24.75pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%;">The current Services Agreement expires on March 31, 2020. On February 11, 2019, Old IAC and Google amended the Services Agreement, effective as of April 1, 2020. The amendment extends the expiration date of the agreement to March 31, 2023; provided that during September 2020 and during each September thereafter, either party may, after discussion with the other party, terminate the services agreement, effective on September 30 of the year following the year such notice is given. New IAC believes that the amended agreement, taken as a whole, is comparable to Old IAC’s currently existing agreement with Google. The Services Agreement requires that New IAC 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 New IAC as well as other companies. These policy and guideline updates could in turn require modifications to, or prohibit and/or render obsolete certain of our products, services and/or business practices, which could be costly to address or otherwise have an adverse effect on our combined financial condition and results of operations, particularly our Desktop business and Ask Media Group. As described below, Google has made </span></div><div><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:115%;">changes to the policies under the Services Agreement and has also made industry‑wide changes that have negatively impacted the Desktop business during both 2018 and 2019.</span></div><div style="text-indent:24.75pt;"><span><br/></span></div><div style="text-indent:24.75pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Google’s policy changes related to its Chrome browser, which became effective on September 12, 2018, negatively impacted the distribution of our B2C downloadable desktop products. The resultant reduction in projected profits and revenues of this business resulted in a $27.7 million impairment of the B2C trade name, which was recorded in the fourth quarter of 2018. On May 31, 2019, Google announced industry-wide policy changes, which became effective on July 1, 2019, related to all extensions distributed through the Chrome Web Store. These industry-wide changes, combined with other changes to polices under the Services Agreement during the second half of 2019, have had a negative impact on the historical and expected future results of operations of the Desktop business. As of December 31, 2019, the goodwill balance of the Desktop reporting unit and the carrying value of the related intangible asset are $265.1 million and $28.9 million, respectively. The fair values of the Desktop reporting unit and the related intangible asset approximate their carrying values; therefore, a modest reduction in the fair values of the Desktop reporting unit or the related intangible asset would result in an impairment charge, which would be equal to the excess of the carrying value over the fair value of such assets.</span></div><div style="text-indent:24.75pt;"><span style="background-color:rgb(255,255,255, 0.0);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="text-indent:24.75pt;"><span><br/></span></div><div style="text-indent:24.75pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">Financial instruments, which potentially subject New IAC to concentration of credit risk, consist primarily of cash and cash equivalents. Cash and cash equivalents are maintained with financial institutions and are in excess of Federal Deposit Insurance Corporation insurance limits.</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);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="text-indent:24.75pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%;">New IAC's business is subject to certain risks and concentrations including dependence on third-party technology providers, exposure to risks associated with online commerce security and credit card fraud.</span></div>
CY2019Q4	us-gaap	Goodwill Fair Value Disclosure GoodwillFairValueDisclosure	265100000	USD
CY2019	us-gaap	Advertising Expense AdvertisingExpense	855200000	USD
CY2018	us-gaap	Advertising Expense AdvertisingExpense	798100000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	750500000	USD
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CY2019	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	0	USD
CY2019	iaci	Putand Call Arrangements Exercised PutandCallArrangementsExercised	1	putOrCall
CY2018	iaci	Putand Call Arrangements Exercised PutandCallArrangementsExercised	2	putOrCall
CY2017	iaci	Putand Call Arrangements Exercised PutandCallArrangementsExercised	2	putOrCall
CY2018	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:700;line-height:120%;">Reclassifications</span></div><div style="text-indent:22.5pt;margin-bottom:12pt;"><span style="background-color:rgb(255,255,255, 0.0);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>
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CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	269267000	USD
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CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	4435000	USD
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CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	20156000	USD
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CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-6755000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-173000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-4119000	USD
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CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-62770000	USD
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CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-126735000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-60489000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13200000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-155402000	USD
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CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	129500000	USD
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CY2018Q4	iaci	Deferred Tax Assets Lease Liabilities Noncurrent DeferredTaxAssetsLeaseLiabilitiesNoncurrent	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	38066000	USD
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CY2019Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	21039000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	16713000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	378834000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	262631000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	92990000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	86778000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	285844000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	175853000	USD
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CY2018Q4	iaci	Deferred Tax Liabilities Investment In Subsidiaries DeferredTaxLiabilitiesInvestmentInSubsidiaries	240590000	USD
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CY2018Q4	us-gaap	Deferred Tax Liabilities Investments DeferredTaxLiabilitiesInvestments	23018000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	31534000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	14120000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	330096000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	313108000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	44252000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	137255000	USD
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CY2019	iaci	Income Tax Expense Benefit Related To Operating Loss Carryforwards IncomeTaxExpenseBenefitRelatedToOperatingLossCarryforwards	-70800000	USD
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CY2019Q4	us-gaap	Tax Credit Carryforward Amount TaxCreditCarryforwardAmount	50200000	USD
CY2019	iaci	Tax Credit Carryforwards Not Subject To Expiration TaxCreditCarryforwardsNotSubjectToExpiration	12800000	USD
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CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	64170000	USD
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CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-277000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5188000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-4856000	USD
CY2019	iaci	Effective Income Tax Rate Reconciliation Stock Based Compensation EffectiveIncomeTaxRateReconciliationStockBasedCompensation	56871000	USD
CY2018	iaci	Effective Income Tax Rate Reconciliation Stock Based Compensation EffectiveIncomeTaxRateReconciliationStockBasedCompensation	39326000	USD
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CY2019	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-5815000	USD
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CY2018	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1280000	USD
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-825000	USD
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	5460000	USD
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CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	5105000	USD
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CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-687000	USD
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CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-866000	USD
CY2017	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-6087000	USD
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CY2017	iaci	Effective Income Tax Rate Reconciliation Transition Tax EffectiveIncomeTaxRateReconciliationTransitionTax	46003000	USD
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1005000	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-3286000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-702000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-60489000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13200000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-155402000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15451000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	14528000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	12766000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	2781000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1455000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	1399000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	238000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	235000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	870000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	410000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	767000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	507000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	18060000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	15451000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	14528000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	2300000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	1800000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	200000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAccrued	200000	USD
CY2019Q4	iaci	Unrecognized Tax Benefits Including Tax Interest Accrued UnrecognizedTaxBenefitsIncludingTaxInterestAccrued	20300000	USD
CY2018Q4	iaci	Unrecognized Tax Benefits Including Tax Interest Accrued UnrecognizedTaxBenefitsIncludingTaxInterestAccrued	17200000	USD
CY2019Q4	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	18900000	USD
CY2018Q4	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	16100000	USD
CY2019Q4	iaci	Change In Unrecognized Tax Benefits Unrelated To The Federal Income Taxes Statute Of Limitations Expiring Reasonably Possible Within Twelve Months Of The Current Reporting Period ChangeInUnrecognizedTaxBenefitsUnrelatedToTheFederalIncomeTaxesStatuteOfLimitationsExpiringReasonablyPossibleWithinTwelveMonthsOfTheCurrentReportingPeriod	10600000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	10300000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	2174968000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	96578000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1616867000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	1484117000	USD
CY2019Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	225296000	USD
CY2018Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	227420000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	124854000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	166362000	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1967017000	USD
CY2018Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	1877899000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	1484117000	USD
CY2019	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	165313000	USD
CY2019	iaci	Goodwill Deductions During Period GoodwillDeductionsDuringPeriod	29293000	USD
CY2019	us-gaap	Goodwill Transfers GoodwillTransfers	-3318000	USD
CY2019	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	48000	USD
CY2019Q4	us-gaap	Goodwill Goodwill	1616867000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	1313514000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	197236000	USD
CY2018	iaci	Goodwill Deductions During Period GoodwillDeductionsDuringPeriod	22264000	USD
CY2018	us-gaap	Goodwill Foreign Currency Translation Gain Loss GoodwillForeignCurrencyTranslationGainLoss	-4369000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	1484117000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	326308000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	201454000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	124854000	USD
CY2019	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P3Y8M12D
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	290924000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	124562000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	166362000	USD
CY2018	us-gaap	Finite Lived Intangible Asset Useful Life FiniteLivedIntangibleAssetUsefulLife	P3Y8M12D
CY2019Q4	us-gaap	Long Term Investments LongTermInvestments	347975000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	61792000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	26108000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	21830000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	12306000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1316000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive	1502000	USD
CY2019Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	124854000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	24947000	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	419000	USD
CY2018Q4	iaci	Debt Securities Tradingand Equity Securities Fvni DebtSecuritiesTradingandEquitySecuritiesFVNI	25366000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	24947000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	1000	USD
CY2018Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	1000	USD
CY2018Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	24947000	USD
CY2018Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	0	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	25000000.0	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Available For Sale Securities ProceedsFromSaleAndMaturityOfAvailableForSaleSecurities	35000000.0	USD
CY2018	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2019	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2019Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	347975000	USD
CY2018Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	225979000	USD
CY2018Q4	us-gaap	Long Term Investments LongTermInvestments	225979000	USD
CY2019	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	19698000	USD
CY2018	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentAnnualAmount	128786000	USD
CY2019	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount	1193000	USD
CY2018	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Annual Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentAnnualAmount	2838000	USD
CY2019	iaci	Equity Securitieswithout Readily Determinable Fair Value Annual Amount EquitySecuritieswithoutReadilyDeterminableFairValueAnnualAmount	18505000	USD
CY2018	iaci	Equity Securitieswithout Readily Determinable Fair Value Annual Amount EquitySecuritieswithoutReadilyDeterminableFairValueAnnualAmount	125948000	USD
CY2019Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Upward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueUpwardPriceAdjustmentCumulativeAmount	19700000	USD
CY2019Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Downward Price Adjustment Cumulative Amount EquitySecuritiesWithoutReadilyDeterminableFairValueDownwardPriceAdjustmentCumulativeAmount	900000	USD
CY2019	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	22880000	USD
CY2018	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	27366000	USD
CY2019	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	18505000	USD
CY2018	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	126063000	USD
CY2019	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	41385000	USD
CY2018	us-gaap	Equity Securities Fv Ni Gain Loss EquitySecuritiesFvNiGainLoss	153429000	USD
CY2018	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	600000	USD
CY2017	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	2700000	USD
CY2017	us-gaap	Costmethod Investments Other Than Temporary Impairment CostmethodInvestmentsOtherThanTemporaryImpairment	7200000	USD
CY2019Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	731159000	USD
CY2019Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	6918000	USD
CY2018Q4	us-gaap	Equity Securities Fv Ni EquitySecuritiesFvNi	419000	USD
CY2018Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	809324000	USD
CY2018Q4	us-gaap	Business Combination Contingent Consideration Liability BusinessCombinationContingentConsiderationLiability	26657000	USD
CY2019Q4	us-gaap	Business Combination Contingent Consideration Arrangements Range Of Outcomes Value High BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh	45000000.0	USD
CY2019Q4	iaci	Business Acquisition Contingent Consideration Fair Valueat Balance Sheet Date With A Maximum Limit BusinessAcquisitionContingentConsiderationFairValueatBalanceSheetDateWithAMaximumLimit	12500000	USD
CY2019Q4	us-gaap	Business Combination Contingent Consideration Liability Noncurrent BusinessCombinationContingentConsiderationLiabilityNoncurrent	6900000	USD
CY2018Q4	us-gaap	Business Combination Contingent Consideration Liability Noncurrent BusinessCombinationContingentConsiderationLiabilityNoncurrent	26700000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1804000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	231946000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	13750000	USD
CY2018Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	13750000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	1804000	USD
CY2018Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	2529000	USD
CY2019Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	231946000	USD
CY2018Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	244971000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	13750000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	13750000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	27500000	USD
CY2019Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	192500000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	247500000	USD
CY2019Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	13750000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	335000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	335000	USD
CY2019	iaci	Noncontrolling Interest Reallocationof Interests Attributableto Parent NoncontrollingInterestReallocationofInterestsAttributabletoParent	-20000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-4974000	USD
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	52000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-5026000	USD
CY2018	iaci	Noncontrolling Interest Reallocationof Interests Attributableto Parent NoncontrollingInterestReallocationofInterestsAttributabletoParent	-11000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	14408000	USD
CY2017	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	41000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	14367000	USD
CY2017	iaci	Noncontrolling Interest Reallocationof Interests Attributableto Parent NoncontrollingInterestReallocationofInterestsAttributabletoParent	-7000	USD
CY2019	us-gaap	Revenues Revenues	2705801000	USD
CY2018	us-gaap	Revenues Revenues	2533048000	USD
CY2017	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	0	USD
CY2019	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	0	USD
CY2018	us-gaap	Reclassification From Aoci Current Period Tax ReclassificationFromAociCurrentPeriodTax	0	USD
CY2019Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	158300000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y2M12D
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1	871800000	USD
CY2019Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Equity Instruments Other Than Options Aggregate Intrinsic Value Outstanding SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsAggregateIntrinsicValueOutstanding	40500000	USD
CY2019	iaci	Sharebased Compensation Arrangementby Sharebased Payment Award Cash Requiredto Settle Vestedand Unvested Interestsatfair Value SharebasedCompensationArrangementbySharebasedPaymentAwardCashRequiredtoSettleVestedandUnvestedInterestsatfairValue	20200000	USD
CY2019	iaci	Sharebased Compensation Arrangementby Sharebased Payment Award Percentageof Withholding Rate SharebasedCompensationArrangementbySharebasedPaymentAwardPercentageofWithholdingRate	0.50
CY2019	iaci	Sharebased Compensation Arrangementby Sharebased Payment Award Numberof Shares Requiredto Settle Vestedand Unvested Interestsatfair Value SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesRequiredtoSettleVestedandUnvestedInterestsatfairValue	100000	shares
CY2017Q2	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Plan Modification Incremental Compensation Cost ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationIncrementalCompensationCost	6600000	USD
CY2019	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2705801000	USD
CY2018	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	2533048000	USD
CY2017	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	1952607000	USD
CY2017	us-gaap	Revenues Revenues	1952607000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	305414000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	260448000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	97898000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	54680000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	46153000	USD
CY2019Q4	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	23188000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-50449000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	35835000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	-164632000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	-50449000	USD
CY2019	us-gaap	Interest Expense InterestExpense	11904000	USD
CY2019	iaci	Interest Income Net Related Party InterestIncomeNetRelatedParty	420000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	33627000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-28306000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-60489000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	32183000	USD
CY2019	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	9288000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	22895000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	35835000	USD
CY2018	us-gaap	Interest Expense InterestExpense	13059000	USD
CY2018	iaci	Interest Income Net Related Party InterestIncomeNetRelatedParty	325000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	282470000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	305571000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	13200000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	292371000	USD
CY2018	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	45599000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	246772000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	-164632000	USD
CY2017	us-gaap	Interest Expense InterestExpense	2181000	USD
CY2017	iaci	Interest Income Net Related Party InterestIncomeNetRelatedParty	23656000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	12363000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-130794000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-155402000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	24608000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-12398000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	37006000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	138608000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	221479000	USD
CY2019	us-gaap	Variable Lease Cost VariableLeaseCost	7776000	USD
CY2019Q4	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	168321000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	191509000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	30413000	USD
CY2019	us-gaap	Lease Cost LeaseCost	38189000	USD
CY2019	us-gaap	Short Term Lease Cost ShortTermLeaseCost	2200000	USD
CY2019	us-gaap	Sublease Income SubleaseIncome	7600000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	32688000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	30200000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	27543000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	25838000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	23318000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	361066000	USD
CY2019Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	169557000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	191509000	USD
CY2019Q4	iaci	Lessee Operating Lease Lease Notyet Commenced Amount LesseeOperatingLeaseLeaseNotyetCommencedAmount	37300000	USD
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P17Y4M24D
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0612
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	61657000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	35321000	USD
CY2019Q4	us-gaap	Loss Contingency Accrual At Carrying Value LossContingencyAccrualAtCarryingValue	0	USD
CY2019	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Percent DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent	0.50
	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.03
	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.10
CY2019Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	43069000	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net Current ContractWithCustomerAssetNetCurrent	40601000	USD
CY2019Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	41934000	USD
CY2018Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	36636000	USD
CY2019Q4	iaci	Capitalize Access Fees Current CapitalizeAccessFeesCurrent	21985000	USD
CY2018Q4	iaci	Capitalize Access Fees Current CapitalizeAccessFeesCurrent	33365000	USD
CY2019Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	45346000	USD
CY2018Q4	us-gaap	Other Assets Miscellaneous Current OtherAssetsMiscellaneousCurrent	56857000	USD
CY2019Q4	us-gaap	Other Assets Current OtherAssetsCurrent	152334000	USD
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	167459000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	507212000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	434222000	USD
CY2019Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	201798000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	173774000	USD
CY2019Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	305414000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	260448000	USD
CY2019Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	105960000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	99205000	USD
CY2019Q4	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	59269000	USD
CY2018Q4	us-gaap	Accrued Advertising Current AccruedAdvertisingCurrent	64626000	USD
CY2019Q4	iaci	Accrued Revenue Share Current AccruedRevenueShareCurrent	30574000	USD
CY2018Q4	iaci	Accrued Revenue Share Current AccruedRevenueShareCurrent	28284000	USD
CY2019Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	124670000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	107450000	USD
CY2019Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	320473000	USD
CY2018Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	299565000	USD
CY2019	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	33627000	USD
CY2018	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	282470000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	12363000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	839796000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	884975000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	757202000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	521416000	USD
CY2019Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	527000	USD
CY2018Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	1441000	USD
CY2017Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	2737000	USD
CY2016Q4	us-gaap	Restricted Cash Current RestrictedCashCurrent	204000	USD
CY2017Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	0	USD
CY2016Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	10548000	USD
CY2019Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	409000	USD
CY2018Q4	us-gaap	Restricted Cash Noncurrent RestrictedCashNoncurrent	420000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	840732000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	886836000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	759939000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	532168000	USD
CY2018	iaci	Fair Value Of Contingent Consideration At Date Of Acquisition FairValueOfContingentConsiderationAtDateOfAcquisition	25500000	USD
CY2019	iaci	Fair Value Of Contingent Consideration At Date Of Acquisition FairValueOfContingentConsiderationAtDateOfAcquisition	0	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	10042000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	13108000	USD
CY2017	us-gaap	Interest Paid Net InterestPaidNet	8000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	4861000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	4084000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	6508000	USD
CY2019	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	3048000	USD
CY2018	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	30320000	USD
CY2017	us-gaap	Proceeds From Income Tax Refunds ProceedsFromIncomeTaxRefunds	11618000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	641220000	USD
CY2019Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	688685000	USD
CY2019Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	705382000	USD
CY2019Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	670514000	USD
CY2019Q1	us-gaap	Cost Of Revenue CostOfRevenue	139848000	USD
CY2019Q2	us-gaap	Cost Of Revenue CostOfRevenue	149725000	USD
CY2019Q3	us-gaap	Cost Of Revenue CostOfRevenue	158161000	USD
CY2019Q4	us-gaap	Cost Of Revenue CostOfRevenue	152506000	USD
CY2019Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-34183000	USD
CY2019Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-13770000	USD
CY2019Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	13912000	USD
CY2019Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-16408000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	-13673000	USD
CY2019Q2	us-gaap	Profit Loss ProfitLoss	22021000	USD
CY2019Q3	us-gaap	Profit Loss ProfitLoss	18378000	USD
CY2019Q4	us-gaap	Profit Loss ProfitLoss	5457000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-14247000	USD
CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	13789000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16466000	USD
CY2019Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	6887000	USD
CY2018Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	587709000	USD
CY2018Q2	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	637928000	USD
CY2018Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	660649000	USD
CY2018Q4	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	646762000	USD
CY2018Q1	us-gaap	Cost Of Revenue CostOfRevenue	108021000	USD
CY2018Q2	us-gaap	Cost Of Revenue CostOfRevenue	120890000	USD
CY2018Q3	us-gaap	Cost Of Revenue CostOfRevenue	129727000	USD
CY2018Q4	us-gaap	Cost Of Revenue CostOfRevenue	142514000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-16356000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	24479000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	39177000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-11465000	USD
CY2018Q1	us-gaap	Profit Loss ProfitLoss	-5002000	USD
CY2018Q2	us-gaap	Profit Loss ProfitLoss	164482000	USD
CY2018Q3	us-gaap	Profit Loss ProfitLoss	38163000	USD
CY2018Q4	us-gaap	Profit Loss ProfitLoss	94728000	USD
CY2018Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2809000	USD
CY2018Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	125686000	USD
CY2018Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	34601000	USD
CY2018Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	89294000	USD
CY2018Q1	iaci	Business Combination Write Off Dueto Deferred Revenue BusinessCombinationWriteOffDuetoDeferredRevenue	2800000	USD
CY2018Q2	iaci	Business Combination Write Off Dueto Deferred Revenue BusinessCombinationWriteOffDuetoDeferredRevenue	1800000	USD
CY2018Q2	us-gaap	Gain Loss On Sale Of Equity Investments GainLossOnSaleOfEquityInvestments	131500000	USD
CY2018Q4	iaci	Impairmentof Intangible Assets Indefinitelived Excluding Goodwill Netof Tax ImpairmentofIntangibleAssetsIndefinitelivedExcludingGoodwillNetofTax	20800000	USD

Files In Submission

Name	View Source	Status
0001800227-20-000017-index-headers.html	Edgar Link	pending
0001800227-20-000017-index.html	Edgar Link	pending
0001800227-20-000017.txt	Edgar Link	pending
0001800227-20-000017-xbrl.zip	Edgar Link	pending
exhibit231.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
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iaci-20201005.htm	Edgar Link	pending
iaci-20201005.xsd	Edgar Link	pending
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iaci-20201005_def.xml	Edgar Link	unprocessable
iaci-20201005_htm.xml	Edgar Link	completed
iaci-20201005_lab.xml	Edgar Link	unprocessable
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$IAC
IAC Inc. Stock $iac

2018 Q4 Form 8-K Financial Statement

#000180022720000017 Filed on October 05, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IAC IAC Inc. Stock $iac

2018 Q4 Form 8-K Financial Statement

#000180022720000017 Filed on October 05, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$IAC
IAC Inc. Stock $iac