v3.26.1
Acquisitions and Divestitures - Additional Information (Details)
$ in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Aug. 10, 2026
CAD ($)
May 11, 2026
CAD ($)
Nov. 01, 2025
CAD ($)
Jul. 31, 2026
CAD ($)
Apr. 30, 2026
CAD ($)
Apr. 30, 2026
USD ($)
Oct. 31, 2025
CAD ($)
Oct. 31, 2025
USD ($)
Jul. 31, 2026
CAD ($)
Jul. 31, 2026
USD ($)
May 11, 2026
USD ($)
Oct. 16, 2025
branch
Disclosure of detailed information about business combination [line items]                        
Adjusted contingent consideration       $ 198         $ 198      
Increase in contingent liabilities recognised in business combination       63         86      
Charge recognized on assets reclassified to held for sale, before tax       1,100                
Charge recognized on assets reclassified to held for sale, after tax       1,000                
U.S. Banking                        
Disclosure of detailed information about business combination [line items]                        
Loan portfolios, held for sale   $ 12,900                 $ 9,200  
Canadian P&C                        
Disclosure of detailed information about business combination [line items]                        
Loan portfolios, held for sale   $ 1,700                    
Disposal of major subsidiary | Moneris Solutions Corporation                        
Disclosure of detailed information about business combination [line items]                        
Expected cash consideration to be received in sale of jointly-owned corporation $ 2,000                      
Ownership interest percentage expected to be sold 50.00%                      
Expected gain to be recorded in non-interest revenue, before tax $ 620                      
Expected gain to be recorded in non-interest revenue, after tax $ 600                      
Stonepeak Partners LP Newly Combined Entity                        
Disclosure of detailed information about business combination [line items]                        
Equity interest ownership percent   19.90%                    
First Citizens and Trust Company                        
Disclosure of detailed information about business combination [line items]                        
Number of branches to be sold | branch                       138
Deposits held for sale       7,400         7,400 $ 5,300    
Loans held for sale       $ 1,000         $ 1,000 $ 700    
Percentage of net deposit premium                       5.00%
Impairment loss recognised in profit or loss, intangible assets and goodwill         $ 17 $ 13 $ 102 $ 73        
Burgundy Asset Management Ltd.                        
Disclosure of detailed information about business combination [line items]                        
Purchase price     $ 654                  
Cash transferred     61                  
Equity interests of acquirer     481                  
Contingent consideration recognised as of acquisition date     $ 112                  
Post-closing period for certain assets under management     18 months                  
Customer relationship intangible assets     $ 375                  
Goodwill     $ 319                  
Amortisation of intangible assets     12 years