Stockholders' Equity (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified
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9 Months Ended |
12 Months Ended |
0 Months Ended |
12 Months Ended |
3 Months Ended |
0 Months Ended |
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Sep. 30, 2012
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Dec. 31, 2012
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Apr. 11, 2014
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Feb. 27, 2014
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Aug. 09, 2012
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Apr. 12, 2012
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Oct. 13, 2014
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Oct. 03, 2014
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Oct. 20, 2014
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Class of Stock [Line Items] |
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Preferred Stock, Shares Issued |
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0us-gaap_PreferredStockSharesIssued
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0us-gaap_PreferredStockSharesIssued
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Stock split, conversion ratio |
0.05us-gaap_StockholdersEquityNoteStockSplitConversionRatio1
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Proceeds from Issuance of Common Stock |
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$ 328us-gaap_ProceedsFromIssuanceOfCommonStock
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Liberty Ventures common stock |
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Class of Stock [Line Items] |
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Shares issued as dividend |
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1linta_CommonStockIssuedDividend / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember
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Stock split, conversion ratio |
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2us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember
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0.05us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember
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2us-gaap_StockholdersEquityNoteStockSplitConversionRatio1 / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember
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Common Class A |
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Class of Stock [Line Items] |
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Share received in exchange |
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1linta_CommonStockSharesReceivedInExchangeForOneShareOfSeriesB / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Common Class A | Liberty Interactive common stock |
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Class of Stock [Line Items] |
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Number of votes |
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1linta_NumberOfVotes / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Common stock, shares authorized |
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4,000,000,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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4,000,000,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Common Stock, Shares, Issued |
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447,451,702us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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471,625,030us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Common Stock, Shares, Outstanding |
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447,451,702us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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471,625,030us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Shares reserved for future issuance upon exercise of stock options |
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24,900,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Outstanding options |
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24,900,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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30,607,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Stock Repurchased and Retired During Period, Shares |
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44,668,431us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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27,356,993us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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46,305,637us-gaap_StockRepurchasedAndRetiredDuringPeriodShares / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Stock Repurchased and Retired During Period, Value |
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815us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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785us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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1,089us-gaap_StockRepurchasedAndRetiredDuringPeriodValue / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Common Class A | Liberty Ventures common stock |
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Class of Stock [Line Items] |
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Number of votes |
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1linta_NumberOfVotes / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Common stock, shares authorized |
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200,000,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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200,000,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Common Stock, Shares, Issued |
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134,525,874us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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70,761,208us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Common Stock, Shares, Outstanding |
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134,525,874us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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70,761,208us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Shares reserved for future issuance upon exercise of stock options |
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4,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Outstanding options |
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3,997,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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1,932,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Stock split, dividends |
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2linta_CommonStockDividendsStockSplitNumberofShares / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Subscription Agreement Amount (in dollars per share) |
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$ 35.99linta_SubscriptionAgreementAmount / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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$ 35.99linta_SubscriptionAgreementAmount / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Stock Issued During Period, Shares, Other |
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9,000,000us-gaap_StockIssuedDuringPeriodSharesOther / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Proceeds from Issuance of Common Stock |
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$ 328us-gaap_ProceedsFromIssuanceOfCommonStock / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassAMember
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Common Class B | Liberty Interactive common stock |
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Class of Stock [Line Items] |
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Number of votes |
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10linta_NumberOfVotes / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Common stock, shares authorized |
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150,000,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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150,000,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Common Stock, Shares, Issued |
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28,877,554us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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28,884,103us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Common Stock, Shares, Outstanding |
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28,877,554us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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28,884,103us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Shares reserved for future issuance upon exercise of stock options |
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1,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Outstanding options |
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1,044,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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432,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Common Class B | Liberty Ventures common stock |
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Class of Stock [Line Items] |
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Number of votes |
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10linta_NumberOfVotes / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Common stock, shares authorized |
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7,500,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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7,500,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Common Stock, Shares, Issued |
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6,991,127us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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2,885,378us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Common Stock, Shares, Outstanding |
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6,991,127us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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2,885,378us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Shares reserved for future issuance upon exercise of stock options |
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1,500,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Outstanding options |
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1,507,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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44,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Stock split, dividends |
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2linta_CommonStockDividendsStockSplitNumberofShares / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
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Common Class C | Liberty Interactive common stock |
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Class of Stock [Line Items] |
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Common stock, shares authorized |
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4,000,000,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember
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Common Stock, Shares, Issued |
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0us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember
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Common Stock, Shares, Outstanding |
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0us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember
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Common Class C | Liberty Ventures common stock |
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Class of Stock [Line Items] |
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Common stock, shares authorized |
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200,000,000us-gaap_CommonStockSharesAuthorized / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember
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Common Stock, Shares, Issued |
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0us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember
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Common Stock, Shares, Outstanding |
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0us-gaap_CommonStockSharesOutstanding / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassCMember
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Reattribution Transaction | Liberty Ventures common stock |
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Class of Stock [Line Items] |
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Common Stock, Shares, Issued |
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67,671,232us-gaap_CommonStockSharesIssued / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_RelatedPartyTransactionAxis = linta_ReattributionTransactionMember
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Liberty Ventures common stock | Reattribution Transaction | Liberty Interactive common stock |
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Class of Stock [Line Items] |
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Ratio applied to the reattribution |
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0.14217linta_StockholdersEquityReattributionRatio / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_RelatedPartyTransactionAxis = linta_ReattributionTransactionMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = linta_VenturesGroupMember
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0.14217linta_StockholdersEquityReattributionRatio / linta_EconomicPerformanceGroupAxis = linta_InteractiveGroupMember / us-gaap_RelatedPartyTransactionAxis = linta_ReattributionTransactionMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = linta_VenturesGroupMember
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Liberty Ventures common stock | Reattribution Transaction | Liberty Ventures common stock |
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Class of Stock [Line Items] |
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Ratio applied to the reattribution |
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0.14217linta_StockholdersEquityReattributionRatio / linta_EconomicPerformanceGroupAxis = linta_VenturesGroupMember / us-gaap_RelatedPartyTransactionAxis = linta_ReattributionTransactionMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = linta_VenturesGroupMember
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