v3.26.1
Segment Information - Schedule of Segment Operating Results from Continuing Operations (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Earnings (Loss) Before Taxes:        
Total segment net revenue $ 12,213 $ 9,136 $ 32,192 $ 24,617
Segment earnings (loss) from operations 1,393 247 2,610 (429)
Operating Segment        
Earnings (Loss) Before Taxes:        
Total segment net revenue 12,213 9,136 32,192 24,617
Segment cost of sales 7,286 6,408 19,924 17,335
Segment operating expenses 2,818 1,878 7,360 4,895
Segment earnings (loss) from operations 2,109 850 4,908 2,387
Networking        
Earnings (Loss) Before Taxes:        
Total segment net revenue 2,893 1,654 8,289 3,814
Networking | Operating Segment        
Earnings (Loss) Before Taxes:        
Total segment net revenue 2,893 1,654 8,289 3,814
Segment cost of sales 1,172 661 3,277 1,478
Segment operating expenses 1,084 628 3,154 1,380
Segment earnings (loss) from operations 637 365 1,858 956
Cloud & AI        
Earnings (Loss) Before Taxes:        
Total segment net revenue 9,042 7,212 23,083 19,994
Cloud & AI | Operating Segment        
Earnings (Loss) Before Taxes:        
Total segment net revenue 9,042 7,212 23,083 19,994
Segment cost of sales 5,859 5,535 15,971 15,239
Segment operating expenses 1,644 1,173 3,974 3,290
Segment earnings (loss) from operations 1,539 504 3,138 1,465
Corporate Investments and Other        
Earnings (Loss) Before Taxes:        
Total segment net revenue 278 270 820 809
Corporate Investments and Other | Operating Segment        
Earnings (Loss) Before Taxes:        
Total segment net revenue 278 270 820 809
Segment cost of sales 254 212 676 618
Segment operating expenses 91 77 232 225
Segment earnings (loss) from operations $ (67) $ (19) $ (88) $ (34)