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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Jul. 29, 2023
Jul. 30, 2022
Jul. 31, 2021
Operating Loss Carryforwards [Line Items]      
Decrease in interest expense $ (427) $ (360) $ (434)
Undistributed earnings of certain foreign subsidiaries on which tax is not provided 6,500    
Unrecognized deferred income tax liability 681    
Gross reduction in unrecognized tax benefits 1,063 69 93
Unrecognized tax benefits that would affect the effective tax rate if realized 1,700    
Net interest expense recognized on unrecognized tax benefits 27 33 74
Accrual for interest and penalties 523 $ 486 $ 444
Unrecognized tax benefit that could be reduced in next 12 months 350    
Tax credit carryforward, valuation allowance 594    
Settled Litigation | Internal Revenue Service (IRS)      
Operating Loss Carryforwards [Line Items]      
Net benefit 145    
Decrease in interest expense 53    
Gross reduction in unrecognized tax benefits 1,100    
Decrease in accrued interest 69    
Domestic Tax Authority      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 320    
Tax credit carryforward 5    
State and Local Jurisdiction      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 879    
Operating loss carryforwards, valuation allowance 10    
Tax credit carryforward 1,600    
Foreign Tax Authority      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards 524    
Operating loss carryforwards, valuation allowance 82    
Tax credit carryforward $ 2