Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2023	Jul. 31, 2022	Jul. 31, 2021
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation and qualifying accounts, beginning balance	$ 31	$ 96	$ 12
Additions Charged to Expense/ Revenue	57	74	92
Deductions	(81)	(139)	(8)
Valuation and qualifying accounts, ending balance	7	31	96
Reserve for returns, credits, and promotional discounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation and qualifying accounts, beginning balance	31	31	35
Additions Charged to Expense/ Revenue	261	247	230
Deductions	(260)	(247)	(234)
Valuation and qualifying accounts, ending balance	$ 32	$ 31	$ 31