Consolidated Statements Of Shareholders' Equity (USD $) In Millions	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Beginning Balance at Dec. 31, 2008	$ 2	$ 706	$ (120)	$ 3,895	$ (1,889)
Beginning Balance (in shares) at Dec. 31, 2008	198				42
Net income				476		476
Other comprehensive income			51			51
Share-based compensation		36
Shares issued under stock plans including income tax benefits		(15)			62
Shares issued under stock plans including income tax benefits (in shares)					(1)
Purchases of treasury stock					(178)
Purchases of treasury stock (in shares)					4
Ending Balance at Dec. 31, 2009	2	727	(69)	4,371	(2,005)
Ending Balance (in shares) at Dec. 31, 2009	198				45
Net income				496		496
Other comprehensive income			19			19
Share-based compensation		39
Shares issued under stock plans including income tax benefits		(16)			83
Shares issued under stock plans including income tax benefits (in shares)					(2)
Purchases of treasury stock					(418)
Purchases of treasury stock (in shares)					8
Ending Balance at Dec. 31, 2010	2	750	(50)	4,867	(2,340)	3,229
Ending Balance (in shares) at Dec. 31, 2010	198				51
Net income				472		472
Other comprehensive income			(28)			(28)
Share-based compensation		39
Shares issued under stock plans including income tax benefits		(12)			91
Shares issued under stock plans including income tax benefits (in shares)					(2)
Purchases of treasury stock					(533)
Purchases of treasury stock (in shares)					9
Ending Balance at Dec. 31, 2011	$ 2	$ 777	$ (78)	$ 5,339	$ (2,782)	$ 3,258
Ending Balance (in shares) at Dec. 31, 2011	198				58