Leases (Supplemental Cash Flow Information) (Details) - USD ($) $ in Millions	3 Months Ended
	Nov. 01, 2020	Oct. 27, 2019
Leases [Abstract]
Operating Lease, Payments	$ 21	$ 19
Finance Lease, Principal Payments	1	0
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	6	46
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	2	0
Operating Lease, Right-of-Use Asset divested with businesses sold	$ 0	$ 6