Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
AOCI
Derivatives, Beginning balance	$ 28	$ 8
Derivatives, Other comprehensive income (loss), net of tax	(2)	3
Derivatives, Ending balance	26	11
Defined Benefit and Pension Plans, Beginning balance	(221)	(106)
Pension and postretirement benefits	2	3
Defined Benefit and Pension Plans, Ending balance	(223)	(109)
Foreign Currency Translation, Beginning balance	19	48
Foreign currency translation, Other comprehensive income (loss), net of tax	22	17
Foreign Currency Translation, Ending balance	41	65
AOCI, Beginning balance	(174)	(50)
Other comprehensive income (loss), net of tax	18	17
AOCI, Ending balance	$ (156)	$ (33)