v3.26.1
Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Apr. 25, 2026
Apr. 26, 2025
Apr. 25, 2026
Apr. 26, 2025
Disaggregation of Revenue [Line Items]        
Revenue $ 15,841 $ 14,149 $ 46,073 $ 41,981
Product        
Disaggregation of Revenue [Line Items]        
Revenue 12,117 10,374 34,836 30,722
Networking        
Disaggregation of Revenue [Line Items]        
Revenue 8,815 7,068 24,877 20,671
Security        
Disaggregation of Revenue [Line Items]        
Revenue 2,008 2,013 6,006 6,142
Collaboration        
Disaggregation of Revenue [Line Items]        
Revenue 1,024 1,031 3,133 3,112
Observability        
Disaggregation of Revenue [Line Items]        
Revenue 269 261 820 796
Services        
Disaggregation of Revenue [Line Items]        
Revenue 3,724 3,775 11,237 11,259
Subscription        
Disaggregation of Revenue [Line Items]        
Revenue 7,791 7,916 23,627 23,622
Subscription Revenue, Product        
Disaggregation of Revenue [Line Items]        
Revenue 4,432 4,483 13,406 13,334
Subscription Revenue, Service        
Disaggregation of Revenue [Line Items]        
Revenue $ 3,359 $ 3,433 $ 10,221 $ 10,288