Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Name:	us-gaap_RestructuringCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Restructuring and Other Charges - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jan. 25, 2020	Jan. 25, 2020	Jan. 26, 2019	Jul. 28, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 226	$ 264
Fiscal 2018 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 42	226
Cumulative restructuring charges incurred	$ 656	$ 656
Fiscal 2020 Plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges				$ 300