Goodwill and Acquired Intangible Assets - Intangible Assets Acquired (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jan. 31, 2022	Jul. 31, 2021
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$ 8,532	$ 4,166
Accumulated amortization	(1,144)	(914)
Acquired intangible assets, net	$ 7,388	$ 3,252
Weighted average life in years	13 years	14 years
Customer Lists / User Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$ 6,198	$ 3,038
Accumulated amortization	(532)	(377)
Acquired intangible assets, net	$ 5,666	$ 2,661
Weighted average life in years	14 years	15 years
Purchased Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$ 1,612	$ 686
Accumulated amortization	(509)	(455)
Acquired intangible assets, net	$ 1,103	$ 231
Weighted average life in years	8 years	5 years
Trade Names and Logos
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$ 680	$ 400
Accumulated amortization	(61)	(41)
Acquired intangible assets, net	$ 619	$ 359
Weighted average life in years	13 years	15 years
Covenants Not to Compete or Sue
Acquired Finite-Lived Intangible Assets [Line Items]
Cost	$ 42	$ 42
Accumulated amortization	(42)	(41)
Acquired intangible assets, net	$ 0	$ 1
Weighted average life in years	0 years	3 years