Derivative Instruments and Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Foreign Currency Contracts
Total (loss) gain	$ (1)	$ 8	$ (15)
Exchange Contract [Member]
Foreign Currency Contracts
Total (loss) gain	3	3	(12)
Forward Contracts [Member]
Foreign Currency Contracts
Total (loss) gain	3	(2)	(3)
Metal Contract [Member]
Foreign Currency Contracts
Total (loss) gain	$ (7)	$ 7