v3.26.1
Securities - Schedule of Unrealized Gains and Losses (Details) - CAD ($)
$ in Millions
Apr. 30, 2026
Oct. 31, 2025
Disclosure of financial assets [line items]    
Fair value through other comprehensive income $ 122,176 $ 113,209
Cost or amortized cost    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 122,155 112,197
Gross unrealized gains    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 631 1,369
Gross unrealized losses    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income (610) (357)
Fair value    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 122,176 113,209
Canadian federal government | Cost or amortized cost    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 49,498 44,894
Canadian federal government | Gross unrealized gains    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 138 443
Canadian federal government | Gross unrealized losses    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income (139) (2)
Canadian federal government | Fair value    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 49,497 45,335
Canadian provincial and municipal governments | Cost or amortized cost    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 7,866 5,525
Canadian provincial and municipal governments | Gross unrealized gains    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 64 132
Canadian provincial and municipal governments | Gross unrealized losses    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income (37) (13)
Canadian provincial and municipal governments | Fair value    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 7,893 5,644
U.S. federal government | Cost or amortized cost    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 23,642 20,515
U.S. federal government | Gross unrealized gains    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 150 327
U.S. federal government | Gross unrealized losses    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income (111) (33)
U.S. federal government | Fair value    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 23,681 20,809
U.S. states, municipalities and agencies | Cost or amortized cost    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 4,598 5,622
U.S. states, municipalities and agencies | Gross unrealized gains    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 42 77
U.S. states, municipalities and agencies | Gross unrealized losses    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income (62) (65)
U.S. states, municipalities and agencies | Fair value    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 4,578 5,634
Other governments | Cost or amortized cost    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 3,840 4,039
Other governments | Gross unrealized gains    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 12 35
Other governments | Gross unrealized losses    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income (14) (9)
Other governments | Fair value    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 3,838 4,065
NHA MBS, U.S. agency MBS and CMO | Cost or amortized cost    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 27,961 26,946
NHA MBS, U.S. agency MBS and CMO | Gross unrealized gains    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 189 291
NHA MBS, U.S. agency MBS and CMO | Gross unrealized losses    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income (232) (222)
NHA MBS, U.S. agency MBS and CMO | Fair value    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 27,918 27,015
Corporate debt | Cost or amortized cost    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 4,584 4,491
Corporate debt | Gross unrealized gains    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 13 37
Corporate debt | Gross unrealized losses    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income (15) (13)
Corporate debt | Fair value    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 4,582 4,515
Corporate equity | Cost or amortized cost    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 166 165
Corporate equity | Gross unrealized gains    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 23 27
Corporate equity | Gross unrealized losses    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income 0 0
Corporate equity | Fair value    
Disclosure of financial assets [line items]    
Fair value through other comprehensive income $ 189 $ 192