Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Net revenue:
Product	$ 271	$ 228
Service and other	442	384
Total net revenue	713	612
Cost of revenue:
Cost of product revenue	29	33
Cost of service and other revenue	131	119
Amortization of acquired technology	6	7
Selling and marketing	244	251
Research and development	213	189
General and administrative	117	119
Amortization of other acquired intangible assets	2	3
Total costs and expenses	742	721
Operating loss from continuing operations	(29)	(109)
Interest expense	(7)	(7)
Interest and other income (expense), net	(4)	0
Loss before income taxes	(40)	(116)
Income tax benefit	(9)	(35)
Net loss from continuing operations	(31)	(81)
Net loss from discontinued operations	0	(3)
Net loss	$ (31)	$ (84)
Earnings Per Share, Basic [Abstract]
Basic net income per share from continuing operations (in dollars per share)	$ (0.11)	$ (0.28)
Basic net income per share from discontinued operations (in dollars per share)	0.00	(0.01)
Basic net income per share (in dollars per share)	$ (0.11)	$ (0.29)
Shares used in basic per share calculations (in shares)	272	286
Earnings Per Share, Diluted [Abstract]
Diluted net income per share from continuing operations (in dollars per share)	$ (0.11)	$ (0.28)
Diluted net income per share from discontinued operations (in dollars per share)	0.00	(0.01)
Diluted net income per share (in dollars per share)	$ (0.11)	$ (0.29)
Shares used in diluted per share calculations (in shares)	272	286
Dividends [Abstract]
Cash dividends declared per common share (in dollars per share)	$ 0.30	$ 0.25