v3.24.3
Goodwill and other intangible assets - Summary of Changes in Carrying Amount of Goodwill by Cash Generating Units (Detail) - CAD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2024
Oct. 31, 2023
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance $ 12,594 $ 12,277
Acquisitions 6,536 70
Dispositions   (30)
Currency translations and other 156 277
Ending balance 19,286 12,594
Personal Banking – Canada [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 1,851 1,802
Acquisitions 3,159 49
Currency translations and other (16)  
Ending balance 4,994 1,851
Caribbean Banking [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 1,791 1,759
Currency translations and other 7 32
Ending balance 1,798 1,791
Commercial Banking [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 793 772
Acquisitions 3,022 21
Ending balance 3,815 793
Canadian wealth management [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 593 589
Acquisitions 283  
Currency translations and other 1 4
Ending balance 877 593
Global asset management [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 2,016 1,928
Acquisitions 72  
Currency translations and other 76 88
Ending balance 2,164 2,016
U.S. Wealth Management (including City National) [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 3,080 3,027
Currency translations and other 11 53
Ending balance 3,091 3,080
International wealth management [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 1,124 1,042
Currency translations and other 74 82
Ending balance 1,198 1,124
Investor Services [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 29 59
Dispositions   (30)
Ending balance 29 29
Insurance [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 112 112
Ending balance 112 112
Capital Markets [member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 1,205 1,187
Currency translations and other 3 18
Ending balance $ 1,208 $ 1,205