Borrowings - Additional Information (Details)			6 Months Ended
	Feb. 02, 2024 USD ($)	May 13, 2021 USD ($)	Jan. 27, 2024 USD ($)	Feb. 19, 2024 USD ($)	Feb. 06, 2024 USD ($)	Jul. 29, 2023 USD ($)
Debt Instrument [Line Items]
Short-term debt			$ 4,936,000,000			$ 1,733,000,000
Derivative, notional amount			8,586,000,000			7,711,000,000
Revolving credit facility | Unsecured facility
Debt Instrument [Line Items]
Credit facility, term		5 years
Maximum borrowing capacity		$ 3,000,000,000
Borrowings on the funds			0
Revolving credit facility | Unsecured facility | Subsequent event
Debt Instrument [Line Items]
Credit facility, term	5 years
Maximum borrowing capacity	$ 5,000,000,000
Covenant, interest rate coverage ratio, minimum	3.0
Interest rate swaps | Fair Value Hedge | Derivatives designated as hedging instruments
Debt Instrument [Line Items]
Derivative, notional amount			1,500,000,000
Commercial paper
Debt Instrument [Line Items]
Commercial paper, maximum borrowing limit (up to)			10,000,000,000
Short-term debt			$ 3,939,000,000			$ 0
Commercial paper | Subsequent event
Debt Instrument [Line Items]
Commercial paper, maximum borrowing limit (up to)					$ 15,000,000,000
Short-term debt				$ 6,900,000,000