Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2016	Apr. 30, 2015
Net revenue:
Product	$ 459	$ 442	$ 994	$ 865
Service and other	1,845	1,693	2,946	2,631
Total net revenue	2,304	2,135	3,940	3,496
Cost of revenue:
Cost of product revenue	30	33	99	108
Cost of service and other revenue	181	161	465	419
Amortization of acquired technology	5	8	17	22
Selling and marketing	423	413	1,023	1,008
Research and development	228	206	646	583
General and administrative	149	131	386	365
Amortization of other acquired intangible assets	3	3	6	9
Goodwill impairment charge	0	114	0	114
Total costs and expenses	1,019	1,069	2,642	2,628
Operating income from continuing operations	1,285	1,066	1,298	868
Interest expense	(10)	(7)	(26)	(21)
Interest and other income (expense), net	2	1	(7)	3
Income before income taxes	1,277	1,060	1,265	850
Income tax provision	429	404	419	335
Net income from continuing operations	848	656	846	515
Net income (loss) from discontinued operations	178	(155)	173	(164)
Net income	$ 1,026	$ 501	$ 1,019	$ 351
Earnings Per Share, Basic [Abstract]
Basic net income per share from continuing operations (in USD per share)	$ 3.30	$ 2.37	$ 3.21	$ 1.82
Basic net income (loss) per share from discontinued operations (in USD per share)	0.70	(0.56)	0.65	(0.58)
Basic net income per share (in USD per share)	$ 4.00	$ 1.81	$ 3.86	$ 1.24
Shares used in basic per share calculations (in shares)	257	277	264	282
Earnings Per Share, Diluted [Abstract]
Diluted net income per share from continuing operations (in USD per share)	$ 3.26	$ 2.33	$ 3.17	$ 1.79
Diluted net income (loss) per share from discontinued operations (in USD per share)	0.68	(0.55)	0.64	(0.57)
Diluted net income per share (in USD per share)	$ 3.94	$ 1.78	$ 3.81	$ 1.22
Shares used in diluted per share calculations (in shares)	260	282	267	288
Dividends [Abstract]
Cash dividends declared per common share (in USD per share)	$ 0.30	$ 0.25	$ 0.90	$ 0.75