Balance Sheet and Other Details - Remaining Performance Obligations (Details) - USD ($) $ in Millions	Jul. 30, 2022	Jul. 31, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 31,539	$ 30,893
Deferred revenue	23,264	22,164
Unbilled Contract Revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	8,275	8,729
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-08-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation		$ 16,289
Period for amount to be recognized as revenue		12 months
Amount to be recognized as revenue over the next 12 months		53.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-31
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 16,936	$ 14,604
Period for amount to be recognized as revenue	12 months
Amount to be recognized as revenue over the next 12 months	54.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-30
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 14,603
Period for amount to be recognized as revenue
Product
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 14,090	$ 13,270
Deferred revenue	10,427	9,416
Service
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	17,449	17,623
Deferred revenue	$ 12,837	$ 12,748