Balance Sheet Details (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Depreciation expense	$ 33	$ 32	$ 64	$ 62
Deferred net revenue (online-enabled games)	$ 1,281		$ 1,281		$ 1,490	[1]

[1] Derived from audited consolidated financial statements.