Leases (Costs) (Details) - USD ($) $ in Millions		3 Months Ended
		Oct. 31, 2021	Nov. 01, 2020
Operating Lease, Cost		$ 19	$ 20
Finance lease, amortization of right-of-use assets		4	1
Short-term Lease, Cost		13	10
Variable Lease, Cost	[1]	52	46
Sublease Income		0	(1)
Lease, Cost, Total		$ 88	$ 76

[1] Includes labor and other overhead in our service contracts with embedded leases.