Financing Receivables - Schedule of Financing Receivables (Details) - USD ($) $ in Millions	Jul. 29, 2023	Jul. 30, 2022	Jul. 31, 2021	Jul. 25, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	$ 6,925	$ 8,018
Residual value	70	76
Unearned income	(88)	(54)
Allowance for credit loss	(72)	(126)	$ (127)	$ (138)
Total, net	6,835	7,914
Current	3,352	3,905
Noncurrent	3,483	4,009
Loan Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	5,910	6,842
Unearned income	0	0
Allowance for credit loss	(53)	(103)	(89)	(90)
Total, net	5,857	6,739
Current	2,988	3,327
Noncurrent	2,869	3,412
Lease Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	1,015	1,176
Residual value	70	76
Unearned income	(88)	(54)
Allowance for credit loss	(19)	(23)	$ (38)	$ (48)
Total, net	978	1,175
Current	364	578
Noncurrent	$ 614	$ 597