Condensed Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Net revenue:
Product	$ 420	$ 434	$ 1,104	$ 1,177
Service and other	478	381	1,065	841
Total net revenue	898	815	2,169	2,018
Cost of revenue:
Product	317	335	407	429
Service and other	84	74	173	153
Total cost of revenue	401	409	580	582
Gross profit	497	406	1,589	1,436
Operating expenses:
Research and development	291	265	585	561
Marketing and sales	143	156	271	279
General and administrative	111	101	219	199
Amortization of intangibles	1	3	3	4
Total operating expenses	546	525	1,078	1,043
Operating income (loss)	(49)	(119)	511	393
Interest and other income (expense), net	(3)	(9)	(11)	(12)
Income (loss) before provision for (benefit from) income taxes	(52)	(128)	500	381
Provision for (benefit from) income taxes	(14)	12	98	79
Net income (loss)	$ (38)	$ (140)	$ 402	$ 302
Earnings (loss) per share:
Basic	$ (0.13)	$ (0.45)	$ 1.34	$ 0.97
Diluted	$ (0.13)	$ (0.45)	$ 1.28	$ 0.90
Number of shares used in computation:
Basic	301	312	301	311
Diluted	301	312	315	334