Business Combinations (Schedule Of Fair Values Of Assets Acquired And Liabilities Assumed) (Details) (Popcap [Member], USD $) In Millions	Sep. 30, 2011	Aug. 31, 2011
Popcap [Member]
Business Acquisition [Line Items]
Current assets		$ 62
Property and equipment, net		6
Goodwill		565
Finite-lived intangibles assets		302
Contingent consideration	(95)	(95)
Deferred income taxes, net		(55)
Other liabilities		(53)
Total purchase price		$ 732