Derivative Instruments - Schedule of Notional Amounts of Derivatives Outstanding (Details) - USD ($) $ in Millions	May 01, 2021	Jul. 25, 2020
Derivative [Line Items]
Derivatives	$ 6,793	$ 7,395
Foreign currency derivatives
Derivative [Line Items]
Derivatives	4,054	4,315
Interest rate derivatives
Derivative [Line Items]
Derivatives	2,000	2,500
Total return swaps—deferred compensation
Derivative [Line Items]
Derivatives	$ 739	$ 580