Financing Receivables - Schedule of Financing Receivables (Details) - USD ($) $ in Millions	Apr. 27, 2024	Jan. 27, 2024	Jul. 29, 2023	Apr. 29, 2023	Jan. 28, 2023	Jul. 30, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	$ 6,804		$ 6,925
Residual value	68		70
Unearned income	(114)		(88)
Allowance for credit loss	(64)	$ (69)	(72)	$ (70)	$ (113)	$ (126)
Total, net	6,694		6,835
Current	3,443		3,352
Noncurrent	3,251		3,483
Loan Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	5,639		5,910
Unearned income	0		0
Allowance for credit loss	(49)	(53)	(53)	(53)	(94)	(103)
Total, net	5,590		5,857
Current	3,027		2,988
Noncurrent	2,563		2,869
Lease Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross	1,165		1,015
Residual value	68		70
Unearned income	(114)		(88)
Allowance for credit loss	(15)	$ (16)	(19)	$ (17)	$ (19)	$ (23)
Total, net	1,104		978
Current	416		364
Noncurrent	$ 688		$ 614