Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2022	Jul. 31, 2021	Jul. 31, 2020
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation and qualifying accounts, beginning balance	$ 96	$ 12	$ 3
Additions Charged to Expense/ Revenue	74	92	68
Deductions	(139)	(8)	(59)
Valuation and qualifying accounts, ending balance	31	96	12
Reserve for returns and credits
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation and qualifying accounts, beginning balance	21	24	24
Additions Charged to Expense/ Revenue	183	168	170
Deductions	(179)	(171)	(170)
Valuation and qualifying accounts, ending balance	25	21	24
Reserve for promotional discounts and rebates
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation and qualifying accounts, beginning balance	10	11	11
Additions Charged to Expense/ Revenue	64	62	73
Deductions	(68)	(63)	(73)
Valuation and qualifying accounts, ending balance	$ 6	$ 10	$ 11