Leases (Supplemental Cash Flow Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 31, 2022	Aug. 01, 2021
Leases [Abstract]
Operating Lease, Payments	$ 78	$ 79
Finance Lease, Principal Payments	17	5
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	79	59
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 16	$ 25