Financial Instruments (Offsetting Assets and Liabilities) (Details) - USD ($) $ in Millions	Jan. 28, 2024	Jul. 30, 2023
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivative Assets	$ 18	$ 20
Derivative Asset, Not Offset, Policy Election Deduction	(6)	(5)
Derivative Asset, Fair Value, Offset Against Collateral, Net of Not Subject to Master Netting Arrangement, Policy Election, Total	12	15
Derivative Liability	32	6
Derivative Liability, Not Offset, Policy Election Deduction	(6)	(5)
Derivative Liability, Fair Value, Amount Offset Against Collateral	$ 26	$ 1