Financial Instruments (Offsetting Assets and Liabilities) (Details) - USD ($) $ in Millions	Apr. 27, 2025	Jul. 28, 2024
General Discussion of Derivative Instruments and Hedging Activities [Abstract]
Derivative Assets	$ 19	$ 11
Derivative Asset, Not Offset, Policy Election Deduction	(6)	(1)
Derivative Asset, Subject to Master Netting Arrangement, after Offset and Deduction Policy Election, Total	13	10
Derivative Liability	16	16
Derivative Liability, Not Offset, Policy Election Deduction	(6)	(1)
Derivative Liability, Subject to Master Netting Arrangement, after Offset and Deduction Policy Election, Total	$ 10	$ 15