Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 25, 2025	Jan. 27, 2024	Jan. 25, 2025	Jan. 27, 2024	Jul. 27, 2024
Leases [Abstract]
Weighted-average remaining lease term (in years)	5 years 4 months 24 days		5 years 4 months 24 days		4 years 10 months 24 days
Weighted-average discount rate	4.10%		4.10%		4.00%
Sales-type lease terms, on average	4 years		4 years
Interest income, lease receivables	$ 16	$ 16	$ 33	$ 30
Operating lease income	$ 9	$ 15	$ 20	$ 31