Income Taxes - Components of deferred tax assets and liabilities (Details) - USD ($) $ in Millions	Jul. 31, 2023	Jul. 31, 2022
Deferred tax assets:
Accruals and reserves not currently deductible	$ 31	$ 84
Federal research and experimentation credit carryforwards	667	0
Operating lease liabilities	153	168
Accrued and deferred compensation	90	84
Loss and tax credit carryforwards	256	224
Intangible assets	0	25
Share-based compensation	94	97
Other, net	27	23
Total gross deferred tax assets	1,318	705
Valuation allowance	(235)	(244)
Total deferred tax assets	1,083	461
Deferred tax liabilities:
Operating lease right-of-use assets	128	149
Intangibles	840	868
Property and equipment	8	9
Other, net	47	43
Total deferred tax liabilities	1,023	1,069
Net deferred tax liabilities		(608)
Deferred Tax Assets, Net [Abstract]
Long-term deferred income tax assets	64	11
Long-term deferred income tax liabilities	(4)	$ (619)
Net deferred tax assets	$ 60