Balance Sheet and Other Details - Remaining Performance Obligations (Details) - USD ($) $ in Millions	Jul. 27, 2024	Jul. 29, 2023
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 41,048	$ 34,868
Deferred revenue	28,475	25,550
Unbilled contract revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	12,573	9,318
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
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	$ 20,882	$ 16,958
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]: 2025-07-27
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 20,166
Period for amount to be recognized as revenue
Product
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	$ 20,055	$ 15,802
Deferred revenue	13,219	11,505
Services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation	20,993	19,066
Deferred revenue	$ 15,256	$ 14,045