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Investments In Affiliates Accounted For Using The Equity Method (Details 2) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Equity Method Investments and Operating Activities Segment [Line Items]      
Share of earnings (losses) of affiliates, net (note 9) $ 39us-gaap_IncomeLossFromEquityMethodInvestments $ 33us-gaap_IncomeLossFromEquityMethodInvestments $ 47us-gaap_IncomeLossFromEquityMethodInvestments
Liberty Interactive common stock      
Equity Method Investments and Operating Activities Segment [Line Items]      
Share of earnings (losses) of affiliates, net (note 9) 51us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_InteractiveGroupMember
48us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_InteractiveGroupMember
28us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_InteractiveGroupMember
Liberty Interactive common stock | HSN, Inc.      
Equity Method Investments and Operating Activities Segment [Line Items]      
Share of earnings (losses) of affiliates, net (note 9) 60us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_InteractiveGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_HsnIncMember
61us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_InteractiveGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_HsnIncMember
40us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_InteractiveGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_HsnIncMember
Liberty Interactive common stock | Equity method investment, other      
Equity Method Investments and Operating Activities Segment [Line Items]      
Share of earnings (losses) of affiliates, net (note 9) (9)us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_InteractiveGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_EquityMethodInvestmentOtherMember
(13)us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_InteractiveGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_EquityMethodInvestmentOtherMember
(12)us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_InteractiveGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_EquityMethodInvestmentOtherMember
Liberty Ventures common stock      
Equity Method Investments and Operating Activities Segment [Line Items]      
Share of earnings (losses) of affiliates, net (note 9) (12)us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_VenturesGroupMember
(15)us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_VenturesGroupMember
19us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_VenturesGroupMember
Liberty Ventures common stock | Expedia      
Equity Method Investments and Operating Activities Segment [Line Items]      
Share of earnings (losses) of affiliates, net (note 9) 58us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_VenturesGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_ExpediaMember
31us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_VenturesGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_ExpediaMember
67us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_VenturesGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_ExpediaMember
Liberty Ventures common stock | Equity method investment, other      
Equity Method Investments and Operating Activities Segment [Line Items]      
Share of earnings (losses) of affiliates, net (note 9) $ (70)us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_VenturesGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_EquityMethodInvestmentOtherMember
$ (46)us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_VenturesGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_EquityMethodInvestmentOtherMember
$ (48)us-gaap_IncomeLossFromEquityMethodInvestments
/ linta_EconomicPerformanceGroupAxis
= linta_VenturesGroupMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= linta_EquityMethodInvestmentOtherMember