Shareholders' Equity (Schedule of Adjustments to Accumulated 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	Dec. 31, 2010
Stockholders' Equity Note [Abstract]
Unrealized gain (loss) on marketable securities, current period change	$ 0	$ 8	$ 0	$ 9
Foreign currency translation, current period change	(69)	98	18	39
Unrealized gain (loss) on interest rate swaps, current period change	7	(2)	22	5
Pension and postretirement benefits, current period change	6	3	19	10
Accumulated other comprehensive income (loss), net, current period change	(56)	107	59	63
Unrealized gain (loss) on marketable securities, income tax (provision) benefit	0	(3)	0	(3)
Foreign currency translation, income tax (provision) benefit	0	0	0	0
Unrealized gain (loss) on interest rate swaps, income tax (provision) benefit	(2)	0	(8)	(4)
Pension and postretirement benefits, income tax (provision) benefit	(2)	(1)	(7)	(2)
Accumulated other comprehensive income (loss), income tax (provision) benefit	(4)	(4)	(15)	(9)
Unrealized gain (loss) on marketable securities	(1)		(1)		(1)
Foreign currency translation	17		17		(1)
Unrealized gain (loss) on interest rate swaps	(70)		(70)		(84)
Pension and postretirement benefits	(572)		(572)		(584)
Accumulated other comprehensive income (loss), net	$ (626)		$ (626)		$ (670)