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Derivative Instruments - Derivatives Recorded at Fair Value (Details) - USD ($)
$ in Millions
Jul. 31, 2021
Jul. 25, 2020
Derivative [Line Items]    
DERIVATIVE ASSETS $ 126 $ 191
DERIVATIVE LIABILITIES 20 10
Derivatives designated as hedging instruments:    
Derivative [Line Items]    
DERIVATIVE ASSETS 123 182
DERIVATIVE LIABILITIES 3 2
Derivatives designated as hedging instruments: | Foreign currency derivatives | Other current assets    
Derivative [Line Items]    
DERIVATIVE ASSETS 14 7
Derivatives designated as hedging instruments: | Foreign currency derivatives | Other assets    
Derivative [Line Items]    
DERIVATIVE ASSETS 1 0
Derivatives designated as hedging instruments: | Foreign currency derivatives | Other current liabilities    
Derivative [Line Items]    
DERIVATIVE LIABILITIES 3 2
Derivatives designated as hedging instruments: | Foreign currency derivatives | Other long-term liabilities    
Derivative [Line Items]    
DERIVATIVE LIABILITIES 0 0
Derivatives designated as hedging instruments: | Interest rate derivatives | Other current assets    
Derivative [Line Items]    
DERIVATIVE ASSETS 9 6
Derivatives designated as hedging instruments: | Interest rate derivatives | Other assets    
Derivative [Line Items]    
DERIVATIVE ASSETS 99 169
Derivatives designated as hedging instruments: | Interest rate derivatives | Other current liabilities    
Derivative [Line Items]    
DERIVATIVE LIABILITIES 0 0
Derivatives designated as hedging instruments: | Interest rate derivatives | Other long-term liabilities    
Derivative [Line Items]    
DERIVATIVE LIABILITIES 0 0
Derivatives not designated as hedging instruments:    
Derivative [Line Items]    
DERIVATIVE ASSETS 3 9
DERIVATIVE LIABILITIES 17 8
Derivatives not designated as hedging instruments: | Foreign currency derivatives | Other current assets    
Derivative [Line Items]    
DERIVATIVE ASSETS 3 8
Derivatives not designated as hedging instruments: | Foreign currency derivatives | Other assets    
Derivative [Line Items]    
DERIVATIVE ASSETS 0 0
Derivatives not designated as hedging instruments: | Foreign currency derivatives | Other current liabilities    
Derivative [Line Items]    
DERIVATIVE LIABILITIES 16 8
Derivatives not designated as hedging instruments: | Foreign currency derivatives | Other long-term liabilities    
Derivative [Line Items]    
DERIVATIVE LIABILITIES 1 0
Derivatives not designated as hedging instruments: | Equity derivatives | Other assets    
Derivative [Line Items]    
DERIVATIVE ASSETS 0 1
Derivatives not designated as hedging instruments: | Equity derivatives | Other long-term liabilities    
Derivative [Line Items]    
DERIVATIVE LIABILITIES $ 0 $ 0