Leases (Supplemental Cash Flow Information) (Details) - USD ($) $ in Millions	6 Months Ended
	Jan. 30, 2022	Jan. 31, 2021
Leases [Abstract]
Operating Lease, Payments	$ 38	$ 40
Finance Lease, Principal Payments	8	2
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	33	27
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 13	$ 3