Stockholders' Equity (Schedule of Components of Other Comprehensive Income (Loss), Net) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Stockholders' Equity Note [Abstract]
Unrealized gain (loss) on marketable securities, gross amount	$ 0		$ 0		$ 0		$ 0
Unrealized gain (loss) on marketable securities, income tax (provision) benefit	0		0		0		0
Unrealized gain (loss) on marketable securities, net amount	0		0		0		0
Foreign currency translation, gross amount	28		(50)		(3)		(24)
Foreign currency translation, income tax (provision) benefit	(2)		0		(2)		0
Foreign currency translation, net amount	26		(50)		(5)		(24)
Gain (loss) on interest rate swaps, gross amount	3	[1]	(1)		5	[2]	1
Gain (loss) on interest rate swaps, income tax (provision) benefit	(1)		1		(2)		0
Gain (loss) on interest rate swaps, net amount	2		0		3		1
Pension and postretirement benefits, gross amount	0	[3]	0	[4]	0	[3]	(1)	[4],[5]
Pension and postretirement benefits, income tax (provision) benefit	0		(2)	[4]	0		(5)	[4]
Pension and postretirement benefits, net amount	0		(2)	[4]	0		(6)	[4]
Total other comprehensive income (loss), gross amount	31		(51)	[4]	2		(24)	[4]
Total other comprehensive income (loss), income tax (provision) benefit	(3)		(1)	[4]	(4)		(5)	[4]
Total other comprehensive income (loss), net of tax	28		(52)	[4]	(2)		(29)	[4]
Other Comprehensive Income (Loss), Net of Tax Portion Attributable To Equity Method Investee	$ (1)				$ (1)		$ (2)

[1] Amount includes $1 million of losses associated with the Company's equity method investments' derivative activity

[2] Amount includes $1 million of losses associated with the Company's equity method investments' derivative activity.

[3] Amount includes amortization of actuarial losses of $1 million related to the Company's equity method investments' pension plans.

[4] As Adjusted (Note 1)

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