v3.26.3
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. 02, 2026
Aug. 03, 2025
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount $ 1,244  
Defined Benefit Plan, Plan Assets, Amount 1,148 $ 1,244
Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 4  
Defined Benefit Plan, Plan Assets, Amount 2 4
Fair Value, Inputs, Level 3 [Member] | Hedge Funds [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 4  
Defined Benefit Plan, Plan Assets, Amount 2 4
Pension Plan, Defined Benefit [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 1,244 1,307
Defined Benefit Plan, Plan Assets, Amount 1,148 1,244
Pension Plan, Defined Benefit [Member] | Fair Value, Inputs, Level 3 [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Defined Benefit Plan, Plan Assets, Amount 4 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 (1) (3)
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 2 4
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 0 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 0 (1)
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 0
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 4 7
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 (1) (2)
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 $ 2 $ 4