Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Apr. 30, 2017	Apr. 30, 2016	Apr. 30, 2017	Apr. 30, 2016
Net revenue:
Product	$ 467	$ 459	$ 1,063	$ 994
Service and other	2,074	1,845	3,272	2,946
Total net revenue	2,541	2,304	4,335	3,940
Cost of revenue:
Cost of product revenue	29	30	95	99
Cost of service and other revenue	205	181	522	465
Amortization of acquired technology	3	5	9	17
Selling and marketing	467	423	1,155	1,023
Research and development	246	228	735	646
General and administrative	146	149	412	386
Amortization of other acquired intangible assets	1	3	2	6
Total costs and expenses	1,097	1,019	2,930	2,642
Operating income from continuing operations	1,444	1,285	1,405	1,298
Interest expense	(8)	(10)	(28)	(26)
Interest and other income (expense), net	3	2	0	(7)
Income before income taxes	1,439	1,277	1,377	1,265
Income tax provision	475	429	430	419
Net income from continuing operations	964	848	947	846
Net income from discontinued operations	0	178	0	173
Net income	$ 964	$ 1,026	$ 947	$ 1,019
Earnings Per Share, Basic [Abstract]
Basic net income per share from continuing operations (in USD per share)	$ 3.76	$ 3.30	$ 3.68	$ 3.21
Basic net income per share from discontinued operations (in USD per share)	0	0.70	0	0.65
Basic net income per share (in USD per share)	$ 3.76	$ 4.00	$ 3.68	$ 3.86
Shares used in basic per share calculations	256	257	257	264
Earnings Per Share, Diluted [Abstract]
Diluted net income per share from continuing operations (in USD per share)	$ 3.70	$ 3.26	$ 3.63	$ 3.17
Diluted net income per share from discontinued operations (in USD per share)	0	0.68	0	0.64
Diluted net income per share (in USD per share)	$ 3.70	$ 3.94	$ 3.63	$ 3.81
Shares used in diluted per share calculations (in shares)	260	260	261	267
Dividends [Abstract]
Cash dividends declared per common share (in USD per share)	$ 0.34	$ 0.30	$ 1.02	$ 0.90