Condensed Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Sep. 30, 2013		Sep. 30, 2012
OPERATING ACTIVITIES
Net loss	$ (51)		$ (180)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization and accretion, net	112		112
Stock-based compensation	71		83
Acquisition-related contingent consideration	(37)		(20)
Non-cash restructuring charges	0		7
Change in assets and liabilities:
Receivables, net	(278)		(274)
Inventories	(15)		(13)
Other assets	8		0
Accounts payable	77		9
Accrued and other liabilities	(37)		109
Deferred income taxes, net	5		(10)
Deferred net revenue (online-enabled games)	(109)		(95)
Net cash used in operating activities	(254)		(272)
INVESTING ACTIVITIES
Capital expenditures	(53)		(56)
Proceeds from maturities and sales of short-term investments	250		280
Purchase of short-term investments	(191)		(197)
Acquisition-related restricted cash	0		25
Acquisition of subsidiaries, net of cash acquired	(5)		(10)
Net cash provided by investing activities	1		42
FINANCING ACTIVITIES
Proceeds from issuance of common stock	50		18
Payment of debt issuance costs	0		(2)
Repurchase and retirement of common stock	0		(179)
Acquisition-related contingent consideration payment	(1)		(26)
Net cash provided by (used in) financing activities	49		(189)
Effect of foreign exchange on cash and cash equivalents	2		(3)
Decrease in cash and cash equivalents	(202)		(422)
Beginning cash and cash equivalents	1,292	[1]	1,293
Ending cash and cash equivalents	1,090		871
Supplemental cash flow information:
Cash paid during the period for income taxes, net	15		17
Cash paid during the period for interest	3		2
Non-cash investing activities:
Change in unrealized gains and losses on available-for-sale securities, net of taxes	$ 0		$ (25)

[1] Derived from audited consolidated financial statements.