Income Taxes (Details 4) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred income taxes
Deferred tax assets - current	$ 44,000,000	$ 19,000,000
Deferred tax assets - non-current	285,000,000	258,000,000
Deferred tax liabilities - current	(17,000,000)	(121,000,000)
Deferred tax liabilities - non-current	(306,000,000)	(301,000,000)
Net deferred tax asset (liability)	6,000,000	(145,000,000)
Valuation allowance
Decrease in valuation allowance	65,000,000
Adjustment to additional paid-in-capital, income tax benefits attributable to employee stock compensation	33,000,000	36,000,000	20,000,000
Undistributed foreign earnings	2,800,000,000
Net operating loss carryforwards
Valuation allowance
Decrease in valuation allowance	19,000,000
Foreign tax credit carryforwards
Valuation allowance
Decrease in valuation allowance	27,000,000
Interest expense carryforwards
Valuation allowance
Decrease in valuation allowance	$ 22,000,000