Balance Sheet and Other Details - Remaining Performance Obligations (Details) - USD ($) $ in Millions	Jan. 28, 2023	Jul. 30, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 31,772	$ 31,539
Deferred revenue	23,927	23,264
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]: 2023-01-29
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 16,865
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]: 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
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-28
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 14,907
Period for amount to be recognized as revenue
Unbilled contract revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 7,845	$ 8,275
Product
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	14,517	14,090
Deferred revenue	10,679	10,427
Service
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	17,255	17,449
Deferred revenue	$ 13,248	$ 12,837