Derivative Instruments - Effect of Derivative Instruments Not Designated as Hedges on Consolidated Statements of Operations (Details) - Derivatives not designated as hedging instruments: - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jan. 28, 2023	Jan. 29, 2022	Jan. 28, 2023	Jan. 29, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	$ 189	$ (80)	$ 91	$ (75)
Foreign currency derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	140	(36)	68	(56)
Total return swaps—deferred compensation
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	44	(41)	19	(20)
Equity derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	$ 5	$ (3)	$ 4	$ 1