Balance Sheet Details (Narrative) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Mar. 31, 2011		Aug. 31, 2011 Popcap [Member]	Mar. 31, 2010 Playfish [Member]
Acquisition-related restricted cash	$ 106		$ 106		$ 100
Depreciation expense	26	25	51	53
Restricted cash from acquisition held in an escrow account							6	100
Deferred net revenue (packaged goods and digital content), current	$ 849		$ 849		$ 1,005	[1]

[1] Derived from audited consolidated financial statements.