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Offsetting of Financial Assets and Financial Liabilities - Summary of Amounts Offset and Not Offset in the Consolidated Balance Sheet (Detail) - CAD ($)
$ in Millions
Oct. 31, 2025
Oct. 31, 2024
Disclosure of offsetting of financial assets and financial liabilities [Line Items]    
Gross amounts (Financial Assets) $ 215,850 $ 182,944
Amounts offset in the balance sheet 29,278 24,784
Net amounts presented in balance sheet 186,572 158,160
Impact of master netting agreements 50,153 37,314
Securities received as collateral [1],[2] 124,201 106,108
Cash collateral 5,714 3,874
Net amount [3] 6,504 10,864
Gross amounts (Financial Liabilities) 222,974 193,878
Amounts offset in the balance sheet 29,278 24,784
Net amounts presented in balance sheet 193,696 169,094
Impact of master netting agreements 50,153 37,314
Securities pledged as collateral [1],[2] 130,183 115,132
Cash collateral 7,739 7,636
Net amount [3] 5,621 9,012
Securities purchased under resale agreements and securities borrowed [member]    
Disclosure of offsetting of financial assets and financial liabilities [Line Items]    
Gross amounts (Financial Assets) 158,361 135,282
Amounts offset in the balance sheet 28,940 24,375
Net amounts presented in balance sheet 129,421 110,907
Impact of master netting agreements 6,899 5,738
Securities received as collateral [1],[2] 121,546 103,814
Cash collateral 49 72
Net amount [3] 927 1,283
Derivative financial instruments assets 1 [member]    
Disclosure of offsetting of financial assets and financial liabilities [Line Items]    
Gross amounts (Financial Assets) 57,489 47,662
Amounts offset in the balance sheet 338 409
Net amounts presented in balance sheet 57,151 47,253
Impact of master netting agreements 43,254 31,576
Securities received as collateral [1],[2] 2,655 2,294
Cash collateral 5,665 3,802
Net amount [3] 5,577 9,581
Derivative financial instruments liabilities 1 [member]    
Disclosure of offsetting of financial assets and financial liabilities [Line Items]    
Gross amounts (Financial Liabilities) 59,067 58,712
Amounts offset in the balance sheet 338 409
Net amounts presented in balance sheet 58,729 58,303
Impact of master netting agreements 43,254 31,576
Securities pledged as collateral [1],[2] 2,657 10,866
Cash collateral 7,613 7,378
Net amount [3] 5,205 8,483
Obligations related to securities sold under repurchase agreements and securities lent [member]    
Disclosure of offsetting of financial assets and financial liabilities [Line Items]    
Gross amounts (Financial Liabilities) 163,907 135,166
Amounts offset in the balance sheet 28,940 24,375
Net amounts presented in balance sheet 134,967 110,791
Impact of master netting agreements 6,899 5,738
Securities pledged as collateral [1],[2] 127,526 104,266
Cash collateral 126 258
Net amount [3] $ 416 $ 529
[1] Certain amounts of collateral are restricted from being sold or repledged except in the event of default or the occurrence of other predetermined events.
[2] Financial assets received/pledged as collateral are disclosed at fair value and limited to the net balance sheet exposure (i.e. any over-collateralization is excluded from the table).
[3] Not intended to represent our actual exposure to credit risk.