Commitments and Contingencies - Schedule of Financing Guarantees Outstanding (Details) - USD ($) $ in Millions	Jan. 29, 2022	Jul. 31, 2021
Loss Contingencies [Line Items]
Maximum potential future payments relating to financing guarantees:	$ 166	$ 160
Deferred revenue associated with financing guarantees:	(9)	(21)
Total	157	139
Channel partner
Loss Contingencies [Line Items]
Maximum potential future payments relating to financing guarantees:	162	155
Deferred revenue associated with financing guarantees:	(5)	(16)
End user
Loss Contingencies [Line Items]
Maximum potential future payments relating to financing guarantees:	4	5
Deferred revenue associated with financing guarantees:	$ (4)	$ (5)