Restructuring and Other Charges - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Apr. 25, 2020	Apr. 25, 2020	Apr. 27, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 354	$ 282
Fiscal 2020 Plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	$ 300	300
Restructuring charges	128	128
Fiscal 2018 Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		226
Cumulative restructuring charges incurred	$ 656	$ 656

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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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