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		9 Months Ended
	Apr. 29, 2023	Apr. 30, 2022	Apr. 29, 2023	Apr. 30, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	$ (54)	$ (132)	$ 37	$ (207)
Foreign currency derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	(46)	(99)	22	(155)
Total return swaps—deferred compensation
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	(12)	(38)	7	(58)
Equity derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Total gains (losses)	$ 4	$ 5	$ 8	$ 6