Condensed Consolidated Statements Of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Net revenue:
Product	$ 543	$ 702
Service and other	406	253
Total net revenue	949	955
Cost of revenue:
Product	130	132
Service and other	64	73
Total cost of revenue	194	205
Gross profit	755	750
Operating expenses:
Research and development	278	282
Marketing and sales	147	151
General and administrative	85	88
Acquisition-related contingent consideration	7	(20)
Amortization of intangibles	4	7
Restructuring and other charges	1	27
Total operating expenses	522	535
Operating income	233	215
Interest and other income (expense), net	(5)	(5)
Income before provision for income taxes	228	210
Provision for income taxes	6	9
Net income	$ 222	$ 201
Net income per share:
Basic	$ 0.73	$ 0.63
Diluted	$ 0.71	$ 0.63
Number of shares used in computation:
Basic	304	317
Diluted	312	320