Derivative Instruments - Additional Information (Details) - USD ($) $ in Millions	6 Months Ended
	Jan. 23, 2021	Jul. 25, 2020
Derivative [Line Items]
Right of set-off, reduction in derivative liabilities	$ 22	$ 10
Right of set-off, reduction in derivative assets	22	10
Cash collateral, assets	141	173
Net derivative asset	$ 4	$ 8
Cash flow hedges
Derivative [Line Items]
Derivative average remaining maturity	24 months
Net investment hedges
Derivative [Line Items]
Derivative average remaining maturity	6 months