Leases (Supplemental Cash Flow Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Aug. 01, 2021	Aug. 02, 2020
Operating Lease, Payments	$ 79	$ 79
Finance Lease, Principal Payments	5	2
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	59	88
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	25	10
Operating Leases divested with business sold	0	18
Finance leases divested with business sold	0	5
Accounting Standards Update 2016-02 [Member]
Build-to-suit Lease Commitment Liability Derecognized	$ 0	$ 20