Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Debt Securities That Are Not Reported At Fair Value) (Details)

v2.4.1.9
Long-Term Debt (Debt Securities That Are Not Reported At Fair Value) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
2015 $ 47us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths  
2016 26us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo  
2017 39us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree  
2018 533us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour  
2019 427us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive  
Fair value of debt not reported at fair value 2,574us-gaap_LongTermDebtFairValue 2,355us-gaap_LongTermDebtFairValue
Senior Debentures    
Debt Instrument [Line Items]    
Fair value of debt not reported at fair value 882us-gaap_LongTermDebtFairValue
/ us-gaap_LongtermDebtTypeAxis
= linta_SeniorDebenturesMember
845us-gaap_LongTermDebtFairValue
/ us-gaap_LongtermDebtTypeAxis
= linta_SeniorDebenturesMember
QVC Senior Secured Notes    
Debt Instrument [Line Items]    
Fair value of debt not reported at fair value $ 4,118us-gaap_LongTermDebtFairValue
/ us-gaap_LongtermDebtTypeAxis
= linta_QvcSeniorSecuredNotesMember
$ 2,861us-gaap_LongTermDebtFairValue
/ us-gaap_LongtermDebtTypeAxis
= linta_QvcSeniorSecuredNotesMember