Financing Receivables - Schedule of Financing Receivables (Details) - USD ($) $ in Millions	Jul. 27, 2024	Jul. 29, 2023	Jul. 30, 2022	Jul. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	$ 6,823	$ 6,925
Residual value	67	70
Unearned income	(111)	(88)
Allowance for credit loss	(65)	(72)	$ (126)	$ (127)
Total, net	6,714	6,835
Current	3,338	3,352
Noncurrent	3,376	3,483
Loan Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	5,858	5,910
Unearned income	0	0
Allowance for credit loss	(50)	(53)	(103)	(89)
Total, net	5,808	5,857
Current	3,071	2,988
Noncurrent	2,737	2,869
Lease Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	965	1,015
Residual value	67	70
Unearned income	(111)	(88)
Allowance for credit loss	(15)	(19)	$ (23)	$ (38)
Total, net	906	978
Current	267	364
Noncurrent	$ 639	$ 614