Balance Sheet and Other Details - Remaining Performance Obligations (Details) - USD ($) $ in Millions	Jul. 29, 2023	Jul. 30, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 34,868	$ 31,539
Deferred revenue	25,550	23,264
Unbilled Contract Revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	9,318	8,275
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
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	$ 17,910	$ 14,603
Period for amount to be recognized as revenue	12 months
Amount to be recognized as revenue over the next 12 months	51.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-28
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 16,958
Period for amount to be recognized as revenue
Product
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 15,802	$ 14,090
Deferred revenue	11,505	10,427
Service
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	19,066	17,449
Deferred revenue	$ 14,045	$ 12,837