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IFRS 7 - Disclosure - Liquidity Risk - Summary of Encumbered and Unencumbered Assets from On- and Off-Balance Sheet Sources (Detail) - CAD ($)
$ in Millions
Jan. 31, 2025
Oct. 31, 2024
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets $ 545,114 $ 499,897
Encumbered liquid assets 287,668 234,751
Unencumbered liquid assets 257,446 265,146
Cash and deposits with banks [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 47,811 48,064
Encumbered liquid assets 593 560
Unencumbered liquid assets 47,218 47,504
Securities issued or guaranteed by sovereigns, central banks, and multilateral development banks [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 314,334 286,823
Encumbered liquid assets 178,768 146,992
Unencumbered liquid assets 135,566 139,831
Other debt securities [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 19,898 17,421
Encumbered liquid assets 4,351 3,696
Unencumbered liquid assets 15,547 13,725
Equities [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 103,090 91,526
Encumbered liquid assets 69,700 54,269
Unencumbered liquid assets 33,390 37,257
Canadian government guaranteed National Housing Act mortgage-backed securities [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 36,955 37,193
Encumbered liquid assets 23,107 20,263
Unencumbered liquid assets 13,848 16,930
Other liquid assets [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 23,026 18,870
Encumbered liquid assets 11,149 8,971
Unencumbered liquid assets 11,877 9,899
Bank owned liquid assets [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 361,712 341,759
Bank owned liquid assets [member] | Cash and deposits with banks [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 47,811 48,064
Bank owned liquid assets [member] | Securities issued or guaranteed by sovereigns, central banks, and multilateral development banks [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 186,503 178,324
Bank owned liquid assets [member] | Other debt securities [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 6,373 6,093
Bank owned liquid assets [member] | Equities [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 67,475 58,102
Bank owned liquid assets [member] | Canadian government guaranteed National Housing Act mortgage-backed securities [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 34,198 35,155
Bank owned liquid assets [member] | Other liquid assets [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 19,352 16,021
Securities received as collateral [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 183,402 158,138
Securities received as collateral [member] | Securities issued or guaranteed by sovereigns, central banks, and multilateral development banks [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 127,831 108,499
Securities received as collateral [member] | Other debt securities [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 13,525 11,328
Securities received as collateral [member] | Equities [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 35,615 33,424
Securities received as collateral [member] | Canadian government guaranteed National Housing Act mortgage-backed securities [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets 2,757 2,038
Securities received as collateral [member] | Other liquid assets [member]    
Disclosure Of Encumbered and Unencumbered Assets [line items]    
Total liquid assets $ 3,674 $ 2,849