Pension And Postretirement Benefits (Schedule Of Pension Plan Assets By Category) (Details) - USD ($) $ in Millions	Aug. 03, 2025	Jul. 28, 2024
Defined Benefit Plan, Plan Assets, Amount	$ 1,244	$ 1,307
Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount	2	1
Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	827	850
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	4	8
Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	833	859
Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan, Plan Assets, Amount	418	447
Short-term Investments [Member] \| Fair Value, Inputs, Level 1 [Member]
Defined Benefit Plan, Plan Assets, Amount	2	1
Short-term Investments [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	0	2
Short-term Investments [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	2	3
Short-term Investments [Member] \| Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan, Plan Assets, Amount	27	46
Equity Securities, US [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	1	1
Equity Securities, US [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	1	1
Corporate Bonds, US [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	410	416
Corporate Bonds, US [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	410	416
Corporate Bonds, Non-US [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	81	85
Corporate Bonds, Non-US [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	81	85
US Treasury and Government [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	302	326
US Treasury and Government [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	302	326
Debt Security, Government, Non-US [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	23	16
Debt Security, Government, Non-US [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	23	16
Municipal Bonds [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	3	4
Municipal Bonds [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	3	4
Asset-backed Securities [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	7	0
Asset-backed Securities [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	7	0
Real Estate [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	0	1
Real Estate [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	0	1
Hedge Funds [Member] \| Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	4	7
Hedge Funds [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	4	7
Derivative Financial Instruments, Assets [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	0	1
Derivative Financial Instruments, Assets [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	0	1
Derivative Financial Instruments, Liabilities [Member] \| Fair Value, Inputs, Level 2 [Member]
Defined Benefit Plan, Plan Assets, Amount	0	(1)
Derivative Financial Instruments, Liabilities [Member] \| Fair Value, Inputs, Level 1, 2 and 3 [Member]
Defined Benefit Plan, Plan Assets, Amount	0	(1)
Equity Funds [Member] \| Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan, Plan Assets, Amount	244	259
Fixed Income Funds [Member] \| Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan, Plan Assets, Amount	79	77
Real Estate Funds [Member] \| Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan, Plan Assets, Amount	68	65
Financial Instrument, Other
Defined Benefit Plan, other items to reconcile to fair value of plan assets, amount	$ (7)	$ 1