Financing Receivables - Summary of Allowances for Credit Loss and Related Financing Receivables (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 30, 2022	Jul. 31, 2021	Jul. 25, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	$ 127	$ 138	$ 126
Provisions (benefits)	(9)	(27)	38
Recoveries (write-offs), net	(2)	(2)	(22)
Foreign exchange and other	10	18	(4)
Allowance for credit loss, end of period	126	127	138
Lease Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	38	48	46
Provisions (benefits)	(13)	(10)	5
Recoveries (write-offs), net	(2)	(1)	(3)
Foreign exchange and other	0	1	0
Allowance for credit loss, end of period	23	38	48
Loan Receivables
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	86	81	71
Provisions (benefits)	4	(12)	32
Recoveries (write-offs), net	0	(1)	(19)
Foreign exchange and other	10	18	(3)
Allowance for credit loss, end of period	100	86	81
Financed Service Contracts
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit loss, beginning of period	3	9	9
Provisions (benefits)	0	(5)	1
Recoveries (write-offs), net	0	0	0
Foreign exchange and other	0	(1)	(1)
Allowance for credit loss, end of period	$ 3	$ 3	$ 9