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Short-term Borrowings and Long-term Debt (Schedule of Short-term Debt) (Details) - USD ($)
$ in Millions
Aug. 01, 2021
Aug. 02, 2020
Short-term Debt [Line Items]    
Debt, Current $ 48 $ 1,202
Other Current Liabilities    
Short-term Debt [Line Items]    
Commercial Paper 37 280
Notes Payable, Current 0 721
Debentures, Current 0 200
Capital Lease Obligations, Current 11 3
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net [1] $ 0 $ 2
[1] Includes unamortized net discount/premium on debt issuances and debt issuance costs.