Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details 1)

v2.4.1.9
Stock-Based Compensation (Details 1) (USD $)
In Millions, except Share data, unless otherwise specified
0 Months Ended 3 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Total unrecognized compensation cost related to unvested equity awards $ 69us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized $ 69us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Weighted average period of recognition related to unvested Liberty equity awards (in years)   2 years 6 months
Common Stock, Capital Shares Reserved for Future Issuance 14,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance 14,000,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
Common Class A    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding options, Beginning Balance 3,064,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
3,207,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Options granted   0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Options exercised   (142,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Options forfeited/cancelled   (1,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Outstanding options, Ending Balance 3,064,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
3,064,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Exercisable options 2,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
2,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Outstanding WAEP, Beginning of period $ 23.23us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
$ 23.21us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
WAEP exercised   $ 22.71us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Forfeited/Canelled, WAEP   $ 31.50us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Outstanding WAEP, End of period $ 23.23us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
$ 23.23us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Exercisable WAEP $ 23.02us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
$ 23.02us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Weighted average remaining life, outstanding 4 years  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 3 years 9 months 18 days  
Outstanding options, aggregate intrinsic value 47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
47us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Exercisable Options, Aggregate Intrinsic Value 40us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
40us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
Common Class C    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Outstanding options, Beginning Balance 10,922,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
9,833,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Options granted   1,350,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Options exercised   (258,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Options forfeited/cancelled   (3,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Outstanding options, Ending Balance 10,922,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
10,922,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Exercisable options 5,278,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
5,278,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Outstanding WAEP, Beginning of period $ 28.36us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
$ 26.71us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
WAEP granted   $ 39.20us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
WAEP exercised   $ 22.33us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Forfeited/Canelled, WAEP   $ 31.07us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Outstanding WAEP, End of period $ 28.36us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
$ 28.36us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Exercisable WAEP $ 22.73us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
$ 22.73us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Weighted average remaining life, outstanding 5 years 2 months 12 days 3 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term 3 years 9 months 18 days  
Outstanding options, aggregate intrinsic value 109us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
109us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
Exercisable Options, Aggregate Intrinsic Value $ 82us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember
$ 82us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassCMember