Other Income (Expense), Net - Table (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Other Income and Expenses [Abstract]
Interest income	$ 7	$ 6
Foreign exchange loss	(8)	(9)
Strategic transaction expenses	(2)	(2)
Impairment of long-lived assets		(2)
Other	5	6
Other income (expense), net	$ 2	$ (1)