v3.26.1
Segment Information and Major Customers - Summary of Net Revenue for Groups of Similar Products and Services (Details) - USD ($)
$ in Millions
 12 Months Ended
Jul. 25, 2026
Jul. 26, 2025
Jul. 27, 2024
Segment Reporting [Line Items]      
Total revenue $ 63,325 $ 56,654 $ 53,803
Product      
Segment Reporting [Line Items]      
Total revenue 48,295 41,608 39,253
Networking      
Segment Reporting [Line Items]      
Total revenue 34,668 28,304 29,229
Security      
Segment Reporting [Line Items]      
Total revenue 8,232 8,094 5,075
Collaboration      
Segment Reporting [Line Items]      
Total revenue 4,300 4,154 4,113
Observability      
Segment Reporting [Line Items]      
Total revenue 1,095 1,055 837
Services      
Segment Reporting [Line Items]      
Total revenue $ 15,030 $ 15,046 $ 14,550