Fair Value Measurements (Details) (USD $) In Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2011	Dec. 31, 2010
Fair Value Of Assets And Liabilities Measured On Recurring Basis And Nonrecurring Basis [Abstract]
Interest rate swaps asset, at fair value	$ 223	$ 176
Foreign currency forwards asset, at fair value	0	1
Total derivative assets at fair value	223	177
Cross-currency swaps liability, at fair value	48	0
Equity award reimbursement obligation, at fair value	22	20
Total derivative liabilities at fair value	70	20
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation Abstract
Fair value of derivative liabilities measured with unobservable inputs, balance at beginning of period	20	35
(Gains) losses recognized in other expense, net	5	(5)
Payments to Time Warner for awards exercised	(3)	(10)
Fair value of derivative liabilities measured with unobservable inputs, balance at end of period	22	20
Other Financial Instruments [Abstract]
Fair value of debt in excess of carrying value	2,805	2,818
Fair Value Inputs Level 2 [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis And Nonrecurring Basis [Abstract]
Interest rate swaps asset, at fair value	223	176
Foreign currency forwards asset, at fair value	0	1
Total derivative assets at fair value	223	177
Cross-currency swaps liability, at fair value	48	0
Equity award reimbursement obligation, at fair value	0	0
Total derivative liabilities at fair value	48	0
Fair Value Inputs Level 3 [Member]
Fair Value Of Assets And Liabilities Measured On Recurring Basis And Nonrecurring Basis [Abstract]
Interest rate swaps asset, at fair value	0	0
Foreign currency forwards asset, at fair value	0	0
Total derivative assets at fair value	0	0
Cross-currency swaps liability, at fair value	0	0
Equity award reimbursement obligation, at fair value	22	20
Total derivative liabilities at fair value	$ 22	$ 20