Business Combinations (Schedule Of Intangible Assets Acquired) (Details) (PopCap [Member], USD $) In Millions, unless otherwise specified	1 Months Ended
	Aug. 31, 2011
Business Acquisition [Line Items]
Gross Carrying Amount	$ 302
Weighted-Average Useful Life	6 years
Developed And Core Technology [Member]
Business Acquisition [Line Items]
Gross Carrying Amount	245
Weighted-Average Useful Life	6 years
Trade Names And Trademarks [Member]
Business Acquisition [Line Items]
Gross Carrying Amount	40
Weighted-Average Useful Life	9 years
In-Process Research And Development [Member]
Business Acquisition [Line Items]
Gross Carrying Amount	15
Weighted-Average Useful Life	5 years
Other Intangibles [Member]
Business Acquisition [Line Items]
Gross Carrying Amount	$ 2
Weighted-Average Useful Life	4 years