Condensed Consolidated Statements Of Cash Flows (USD $) In Millions	6 Months Ended
	Sep. 30, 2011		Sep. 30, 2010
OPERATING ACTIVITIES
Net loss	$ (119)		$ (105)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization and accretion, net	94		94
Stock-based compensation	81		90
Acquisition-related contingent consideration	19		(26)
Non-cash restructuring charges			(1)
Net gains on investments and sale of property and equipment	(12)		(24)
Change in assets and liabilities:
Receivables, net	(215)		(237)
Inventories	(11)		(55)
Other assets	(63)		14
Accounts payable	(57)		106
Accrued and other liabilities	2		(142)
Deferred income taxes, net	(48)		27
Deferred net revenue (packaged goods and digital content)	(156)		(23)
Net cash used in operating activities	(485)		(282)
INVESTING ACTIVITIES
Capital expenditures	(84)		(23)
Proceeds from sale of property and equipment	26
Proceeds from sale of marketable equity securities	0		132
Proceeds from maturities and sales of short-term investments	319		197
Purchase of short-term investments	(179)		(262)
Acquisition of subsidiaries, net of cash acquired	(657)
Net cash provided by (used in) investing activities	(575)		44
FINANCING ACTIVITIES
Proceeds from issuance of common stock	35		17
Proceeds from borrowings on convertible senior notes, net of issuance costs	617
Proceeds from issuance of warrants	65
Purchase of convertible note hedge	(107)
Excess tax benefit from stock-based compensation	3
Repurchase and retirement of common stock	(189)
Net cash provided by financing activities	424		17
Effect of foreign exchange on cash and cash equivalents	(13)		4
Decrease in cash and cash equivalents	(649)		(217)
Beginning cash and cash equivalents	1,579	[1]	1,273
Ending cash and cash equivalents	930		1,056
Supplemental cash flow information:
Cash paid (refunded) during the period for income taxes, net	(9)		7
Non-cash investing activities:
Change in unrealized gains on available-for-sale securities, net of taxes	55		24
Equity issued in connection with acquisition	$ 87

[1] Derived from audited consolidated financial statements.