Shareholders' Equity (Schedule of Components of Other Comprehensive Income (Loss), Net) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Stockholders' Equity Note [Abstract]
Unrealized gain (loss) on marketable securities, gross amount	$ 0	$ 8	$ 0	$ 9
Unrealized gain (loss) on marketable securities, income tax (provision) benefit	0	(3)	0	(3)
Unrealized gain (loss) on marketable securities, net amount	0	5	0	6
Foreign currency translation, gross amount	(69)	98	18	39
Foreign currency translation, income tax (provision) benefit	0	0	0	0
Foreign currency translation, net amount	(69)	98	18	39
Unrealized gain (loss) on interest rate swaps, gross amount	7	(2)	22	5
Unrealized gain (loss) on interest rate swaps, income tax (provision) benefit	(2)	0	(8)	(4)
Unrealized gain (loss) on interest rate swaps, net amount	5	(2)	14	1
Pension and postretirement benefits, gross amount	6	3	19	10
Pension and postretirement benefits, income tax (provision) benefit	(2)	(1)	(7)	(2)
Pension and postretirement benefits, net amount	4	2	12	8
Total other comprehensive income (loss), gross amount	(56)	107	59	63
Total other comprehensive income (loss), income tax (provision) benefit	(4)	(4)	(15)	(9)
Total other comprehensive income (loss), net of tax	$ (60)	$ 103	$ 44	$ 54