Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current
US Federal	$ (2)
US State	(2)
Non-US	(17)	(23)	(24)
Total	(21)	(23)	(24)
Deferred
US Federal	(3)	(3)	(19)
Non-US	(1)		(2)
Total	(4)	(3)	(21)
Non-current
Liabilities for uncertain tax positions	2	(3)	(2)
Provision for income taxes	$ (23)	$ (29)	$ (47)