Accumulated Other Comprehensive Income (Loss) (Details) (USD $)				3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Mar. 31, 2013 Net Effect of Exchange Rate Fluctuations	Mar. 31, 2013 Change in Certain Derivative Instruments	Mar. 31, 2013 Employee Benefit Plans	Mar. 31, 2013 Accumulated Other Comprehensive Loss
Increase (Decrease) Accumulated Other Comprehensive Income (Loss), Net of Tax
Balance at beginning of the period	$ (1,444,000,000)	$ (1,465,000,000)	$ (1,164,000,000)	$ 455,000,000	$ (7,000,000)	$ (1,913,000,000)	$ (1,465,000,000)
Change before reclassifications				(28,000,000)	3,000,000		(25,000,000)
Amounts reclassified from accumulated other comprehensive income					1,000,000	37,000,000	38,000,000
Translation effect						10,000,000	10,000,000
Tax effect						(2,000,000)	(2,000,000)
Other comprehensive income attributable to the Company				(28,000,000)	4,000,000	45,000,000	21,000,000
Balance at end of the period	$ (1,444,000,000)	$ (1,465,000,000)	$ (1,164,000,000)	$ 427,000,000	$ (3,000,000)	$ (1,868,000,000)	$ (1,444,000,000)