Financing Receivables - Summary of Allowances for Credit Loss and Related Financing Receivables (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Apr. 29, 2023	Apr. 30, 2022	Apr. 29, 2023	Apr. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	$ 113	$ 97	$ 126	$ 127
Provisions (benefits)	(4)	24	(12)	(4)
Recoveries (write-offs), net	(39)		(39)	(2)
Other		3	(5)	3
Allowance for credit loss, end of period	70	124	70	124
Loan Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	94	70	103	89
Provisions (benefits)	(3)	26	(7)	7
Recoveries (write-offs), net	(38)		(38)	0
Other		3	(5)	3
Allowance for credit loss, end of period	53	99	53	99
Lease Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	19	27	23	38
Provisions (benefits)	(1)	(2)	(5)	(11)
Recoveries (write-offs), net	(1)		(1)	(2)
Other		0	0	0
Allowance for credit loss, end of period	$ 17	$ 25	$ 17	$ 25