Stockholders' Equity (Schedule of Components of Other Comprehensive Income (Loss), Net) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Stockholders' Equity Note [Abstract]
Unrealized gain (loss) on marketable securities, gross amount	$ 0	$ 0
Unrealized gain (loss) on marketable securities, income tax (provision) benefit	0	0
Unrealized gain (loss) on marketable securities, net amount	0	0
Foreign currency translation, gross amount	(31)	26
Foreign currency translation, income tax (provision) benefit	0	0
Foreign currency translation, net amount	(31)	26
Gain (loss) on interest rate swaps, gross amount	2	2
Gain (loss) on interest rate swaps, income tax (provision) benefit	(1)	(1)
Gain (loss) on interest rate swaps, net amount	1	1
Pension and postretirement benefits, gross amount	0	(1)	[1],[2]
Pension and postretirement benefits, income tax (provision) benefit	0	(3)	[1]
Pension and postretirement benefits, net amount	0	(4)	[1]
Total other comprehensive income (loss), gross amount	(29)	27	[1]
Total other comprehensive income (loss), income tax (provision) benefit	(1)	(4)	[1]
Total other comprehensive income (loss), net of tax	(30)	23	[1]
Actuarial Gain (Loss) from Equity Method Investee	$ (2)

[1] As Adjusted (Note 1)

[2] Amount includes amortization of actuarial losses of $2 million related to the Company's equity method investments' pension plans.