Balance Sheet Details (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2012
Balance Sheet Related Disclosures [Abstract]
Depreciation expense	$ 30	$ 23	$ 87	$ 74
Acquisition-related restricted cash	6		6		31
Deferred net revenue (packaged goods and digital content)	$ 1,213		$ 1,213		$ 1,048	[1]

[1] Derived from audited consolidated financial statements.