Financing Receivables - Schedule of Financing Receivables (Details) - USD ($) $ in Millions	Jan. 27, 2024	Oct. 28, 2023	Jul. 29, 2023	Jan. 28, 2023	Oct. 29, 2022	Jul. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	$ 6,949		$ 6,925
Residual value	70		70
Unearned income	(110)		(88)
Allowance for credit loss	(69)	$ (74)	(72)	$ (113)	$ (120)	$ (126)
Total, net	6,840		6,835
Current	3,476		3,352
Noncurrent	3,364		3,483
Loan Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	5,850		5,910
Unearned income	0		0
Allowance for credit loss	(53)	(58)	(53)	(94)	(101)	(103)
Total, net	5,797		5,857
Current	3,066		2,988
Noncurrent	2,731		2,869
Lease Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	1,099		1,015
Residual value	70		70
Unearned income	(110)		(88)
Allowance for credit loss	(16)	$ (16)	(19)	$ (19)	$ (19)	$ (23)
Total, net	1,043		978
Current	410		364
Noncurrent	$ 633		$ 614