Consolidated Statements Of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Net revenue:
Product	$ 2,134	$ 2,738	$ 3,415
Service and other	1,441	1,059	728
Total net revenue	3,575	3,797	4,143
Cost of revenue:
Product	1,032	1,085	1,374
Service and other	315	303	224
Total cost of revenue	1,347	1,388	1,598
Gross profit	2,228	2,409	2,545
Operating expenses:
Research and development	1,125	1,153	1,180
Marketing and sales	680	788	883
General and administrative	410	354	377
Acquisition-related contingent consideration	(35)	(64)	11
Amortization of intangibles	16	30	43
Restructuring and other charges	(1)	27	16
Total operating expenses	2,195	2,288	2,510
Operating loss	33	121	35
Gains on strategic investments, net	0	39	0
Interest and other income (expense), net	(26)	(21)	(17)
Income (loss) before provsion for (benefit from) income taxes	7	139	18
Provision for (benefit from) income taxes	(1)	41	(58)
Net income (loss)	$ 8	$ 98	$ 76
Net income (loss) per share:
Basic	$ 0.03	$ 0.32	$ 0.23
Diluted	$ 0.03	$ 0.31	$ 0.23
Number of shares used in computation:
Basic	308	310	331
Diluted	316	313	336