Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Net revenue:
Product	$ 2,640	$ 2,497	$ 2,568
Service and other	2,205	1,899	1,947
Total net revenue	4,845	4,396	4,515
Cost of revenue:
Product	893	938	1,028
Service and other	405	416	401
Total cost of revenue	1,298	1,354	1,429
Gross profit	3,547	3,042	3,086
Operating expenses:
Research and development	1,205	1,109	1,094
Marketing and sales	673	622	647
General and administrative	439	406	386
Acquisition-related contingent consideration	0	0	(3)
Amortization of intangibles	6	7	14
Total operating expenses	2,323	2,144	2,138
Operating income	1,224	898	948
Interest and other income (expense), net	(14)	(21)	(23)
Income before provision for (benefit from) income taxes	1,210	877	925
Provision for (benefit from) income taxes	243	(279)	50
Net income	$ 967	$ 1,156	$ 875
Earnings per share:
Basic	$ 3.19	$ 3.73	$ 2.81
Diluted	$ 3.08	$ 3.50	$ 2.69
Number of shares used in computation:
Basic	303	310	311
Diluted	314	330	325