Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2024	Jul. 31, 2023	Jul. 31, 2022
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation and qualifying accounts, beginning balance	$ 7	$ 31	$ 96
Additions Charged to Expense/ Revenue	61	57	74
Deductions	(63)	(81)	(139)
Valuation and qualifying accounts, ending balance	5	7	31
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	32	31	31
Additions Charged to Expense/ Revenue	302	261	247
Deductions	(294)	(260)	(247)
Valuation and qualifying accounts, ending balance	$ 40	$ 32	$ 31