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Financial Instruments (Schedule Of The Fair Value Of Derivative Instruments) (Details) - USD ($)
$ in Millions
Apr. 27, 2025
Jul. 28, 2024
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset $ 19 $ 11
Derivative Liability, Fair Value, Gross Liability 16 16
Derivatives Designated As Hedges [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 0 2
Derivative Liability, Fair Value, Gross Liability 3 0
Derivatives Designated As Hedges [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 0 2
Derivatives Designated As Hedges [Member] | Foreign Exchange Contract [Member] | Accrued Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability 3 0
Derivatives Not Designated As Hedges [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 19 9
Derivative Liability, Fair Value, Gross Liability 13 16
Derivatives Not Designated As Hedges [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 3 0
Derivatives Not Designated As Hedges [Member] | Commodity Derivative Contracts [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset 11 6
Derivatives Not Designated As Hedges [Member] | Commodity Derivative Contracts [Member] | Accrued Liabilities [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Fair Value, Gross Liability 13 16
Derivatives Not Designated As Hedges [Member] | Equity Contracts [Member] | Other Current Assets [Member]    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Fair Value, Gross Asset $ 5 $ 3