Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Net revenue:
Product	$ 2,586	$ 2,640	$ 2,497
Service and other	2,564	2,205	1,899
Total net revenue	5,150	4,845	4,396
Cost of revenue:
Product	822	893	938
Service and other	455	405	416
Total cost of revenue	1,277	1,298	1,354
Gross profit	3,873	3,547	3,042
Operating expenses:
Research and development	1,320	1,205	1,109
Marketing and sales	641	673	622
General and administrative	469	439	406
Amortization of intangibles	9	6	7
Total operating expenses	2,439	2,323	2,144
Operating income	1,434	1,224	898
Interest and other income (expense), net	15	(14)	(21)
Income before provision for (benefit from) income taxes	1,449	1,210	877
Provision for (benefit from) income taxes	406	243	(279)
Net income	$ 1,043	$ 967	$ 1,156
Earnings per share:
Basic	$ 3.39	$ 3.19	$ 3.73
Diluted	$ 3.34	$ 3.08	$ 3.50
Number of shares used in computation:
Basic	308	303	310
Diluted	312	314	330