Goodwill And Purchased Intangible Assets (Narrative) (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Foreign Currency Translation Adjustment [Member]	Dec. 31, 2010 Foreign Currency Translation Adjustment [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill expected to be deductible in future periods	$ 99		$ 99
Goodwill, impairment loss	0	0	0	0
Finite-lived intangible assets, amortization expense	13	15	41	42
Net intangible assets					$ (20)	$ (11)