Stockholders' Equity - Share-Based Compensation Expense (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 1,308	$ 753	$ 435
Income tax benefit	(396)	(269)	(173)
Decrease in net income	912	484	262
Software and Software Development Costs
Decrease in net income per share:
Share-based compensation expense	$ 1	$ 2	$ 3
Share Based Compensation Expense
Decrease in net income per share:
Basic (in dollars per share)	$ 3.26	$ 1.79	$ 1.00
Diluted (in dollars per share)	$ 3.21	$ 1.77	$ 0.99
Total share-based compensation expense
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 1,308	$ 753	$ 435
Cost of product revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	2	1	1
Cost of service and other revenue
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	144	68	59
Selling and marketing
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	309	183	116
Research and development
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	521	281	151
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 332	$ 220	$ 108

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