Pension And Postretirement Benefits (Schedule of Change In Fair Value Of Pension Assets) (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 28, 2024	Jul. 30, 2023
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Amount	$ 1,316
Defined Benefit Plan, Plan Assets, Amount	1,307	$ 1,316
Pension Plan, Defined Benefit [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Plan Assets, Amount	1,316	1,763
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	86	(1)
Defined Benefit Plan, Plan Assets, Contributions by Employer	1	1
Defined Benefit Plan, Plan Assets, Benefits Paid	(91)	(91)
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	(352)
Defined Benefit Plan, Plan Assets, Foreign Currency Translation Gain (Loss)	(5)	(4)
Defined Benefit Plan, Plan Assets, Amount	$ 1,307	$ 1,316