v3.25.2
Pension And Postretirement Benefits Pension And Postretirement Benefits (Schedule Of Changes In Fair Value Of Level 3 Investments) (Details) - USD ($)
$ in Millions
 12 Months Ended
Aug. 03, 2025
Jul. 28, 2024
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount $ 1,307  
Defined Benefit Plan, Plan Assets, Amount 1,244 $ 1,307
Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 8  
Defined Benefit Plan, Plan Assets, Amount 4 8
Fair Value, Inputs, Level 3 [Member] | Real Estate [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 1  
Defined Benefit Plan, Plan Assets, Amount 0 1
Fair Value, Inputs, Level 3 [Member] | Hedge Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 7  
Defined Benefit Plan, Plan Assets, Amount 4 7
Pension Plan, Defined Benefit [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 1,307 1,316
Defined Benefit Plan, Plan Assets, Amount 1,244 1,307
Pension Plan, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 8 9
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Sold (1) (1)
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement (3) 0
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3 0 0
Defined Benefit Plan, Plan Assets, Amount 4 8
Pension Plan, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | Real Estate [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 1 1
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Sold 0 0
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement (1) 0
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3 0 0
Defined Benefit Plan, Plan Assets, Amount 0 1
Pension Plan, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member] | Hedge Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 7 8
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Actual Return (Loss) on Plan Assets Sold (1) (1)
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Purchase, Sale, and Settlement (2) 0
Defined Benefit Plan, Plan Assets Level 3 Reconciliation, Increase (Decrease) for Assets Transferred into (out of) Level 3 0 0
Defined Benefit Plan, Plan Assets, Amount $ 4 $ 7