Description of Business and Summary of Significant Accounting Policies - Additional information (Details) - USD ($)	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Property, Plant and Equipment [Line Items]
Deferred revenue, revenue recognized	$ 684,000,000	$ 652,000,000
Revenue, performance obligation, description of timing	12 months
Deferred revenue	$ 6,000,000	8,000,000
Advertising expense	$ 1,600,000,000	1,100,000,000	$ 778,000,000
Business combination measurement period	1 year
Goodwill, impairment loss	$ 0	$ 0	$ 0
Acquired intangible assets, useful life	13 years	14 years
Minimum
Property, Plant and Equipment [Line Items]
Capitalized contract cost, amortization period	3 years
Property and equipment, useful life	2 years
Acquired intangible assets, useful life	2 years
Maximum
Property, Plant and Equipment [Line Items]
Capitalized contract cost, amortization period	4 years
Property and equipment, useful life	30 years
Acquired intangible assets, useful life	15 years
Software Development | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	3 years
Software Development | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	6 years