v3.26.1
Supplementary Financial Information - Schedule of Other Non-Current Assets (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2026
Apr. 30, 2026
Apr. 30, 2025
Oct. 31, 2025
Finite-Lived Intangible Assets [Line Items]        
Deferred tax assets $ 3,409 $ 3,409   $ 3,318
Right-of-use assets 1,094 1,094   1,129
Intangible assets 878 878   1,012
Prepaid pension and post-retirement benefit assets 199 199   425
Deposits and prepaid 188 188   316
Other 1,375 1,375   1,361
Other non-current assets 7,143 7,143   $ 7,561
Non-cash and other adjustments   (12) $ (15)  
Charges   189 $ 161  
Special Termination Benefit | Fiscal 2026 Plan        
Finite-Lived Intangible Assets [Line Items]        
Charges 280      
Customer Contracts, Customer Lists And Distribution Agreements        
Finite-Lived Intangible Assets [Line Items]        
Impairment charges $ 32 $ 32