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Goodwill and Other Intangibles (Summary of Goodwill by Segment) (Details) - CAD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance $ 18,851 $ 18,602
Additions 0 128
Foreign currency translation adjustments and other 129 121
Ending balance 18,980 18,851
Accumulated impairment
Canadian Personal And Commercial Banking [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 902 902
Additions 0 0
Foreign currency translation adjustments and other 1 0
Ending balance 903 902
US Retail [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 14,663 14,620
Additions 0 0
Foreign currency translation adjustments and other 113 43
Ending balance 14,776 14,663
Wealth Management And Insurance [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 2,125 2,122
Additions 0 0
Foreign currency translation adjustments and other 7 3
Ending balance 2,132 2,125
Wholesale Banking [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Beginning balance 1,161 958
Additions 0 128
Foreign currency translation adjustments and other 8 75
Ending balance $ 1,169 $ 1,161
Pre-tax discount rates 13.30% 14.40%
Top of range [member] | Canadian Personal And Commercial Banking [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Pre-tax discount rates 10.70% 9.90%
Top of range [member] | US Retail [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Pre-tax discount rates 11.80% 11.80%
Top of range [member] | Wealth Management And Insurance [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Pre-tax discount rates 11.90% 11.00%
Bottom of range [member] | Canadian Personal And Commercial Banking [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Pre-tax discount rates 9.90% 9.70%
Bottom of range [member] | US Retail [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Pre-tax discount rates 11.00% 10.70%
Bottom of range [member] | Wealth Management And Insurance [Member]    
Disclosure of reconciliation of changes in goodwill [line items]    
Pre-tax discount rates 11.00% 10.90%