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, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
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	(50)	29	(24)	87
Foreign currency translation, income tax (provision) benefit	0	0	0	0
Foreign currency translation, net amount	(50)	29	(24)	87
Unrealized gain (loss) on interest rate swaps, gross amount	(1)	1	1	15
Unrealized gain (loss) on interest rate swaps, income tax (provision) benefit	1	(1)	0	(6)
Unrealized gain (loss) on interest rate swaps, net amount	0	0	1	9
Pension and postretirement benefits, gross amount	14	7	26	13
Pension and postretirement benefits, income tax (provision) benefit	(5)	(2)	(11)	(5)
Pension and postretirement benefits, net amount	9	5	15	8
Total other comprehensive income (loss), gross amount	(37)	37	3	115
Total other comprehensive income (loss), income tax (provision) benefit	(4)	(3)	(11)	(11)
Total other comprehensive income (loss), net of tax	$ (41)	$ 34	$ (8)	$ 104