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Derivatives (Summary of Notional Amounts of Over the Counter and Exchange Traded Derivatives) (Details) - CAD ($)
Oct. 31, 2025
Oct. 31, 2024
Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount $ 24,755,448,000,000 $ 21,393,647,000,000
Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 4,329,443,000,000 3,848,929,000,000
Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 20,949,000,000 17,397,000,000
Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 729,664,000,000 523,623,000,000
Derivatives [member]    
Disclosure of financial assets [line items]    
Notional amount 29,835,504,000,000 25,783,596,000,000
Derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 24,755,448,000,000 21,393,647,000,000
Derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 4,329,443,000,000 3,848,929,000,000
Derivatives [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 20,949,000,000 17,397,000,000
Derivatives [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 729,664,000,000 523,623,000,000
Trading derivatives [member]    
Disclosure of financial assets [line items]    
Notional amount 27,678,466,000,000  
Trading derivatives [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 20,567,672,000,000  
Trading derivatives [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 5,413,812,000,000  
Trading derivatives [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,696,982,000,000  
Trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 22,844,349,000,000  
Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 20,551,654,000,000  
Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 975,703,000,000  
Trading derivatives [member] | Interest rate contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,316,992,000,000  
Trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 4,118,689,000,000  
Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 48,000,000  
Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 4,118,275,000,000  
Trading derivatives [member] | Foreign exchange contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 366,000,000  
Trading derivatives [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 18,059,000,000  
Trading derivatives [member] | Credit contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 15,796,000,000  
Trading derivatives [member] | Credit contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 2,263,000,000  
Trading derivatives [member] | Credit contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Trading derivatives [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 697,369,000,000  
Trading derivatives [member] | Other contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 174,000,000  
Trading derivatives [member] | Other contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 317,571,000,000  
Trading derivatives [member] | Other contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 379,624,000,000  
Non trading derivatives [member]    
Disclosure of financial assets [line items]    
Notional amount 2,157,038,000,000  
Non trading derivatives [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 1,762,000,000,000 1,532,000,000,000
Non trading derivatives [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 395,000,000,000 394,000,000,000
Non trading derivatives [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0 0
Non trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,911,099,000,000  
Non trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 210,754,000,000  
Non trading derivatives [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 2,890,000,000  
Non trading derivatives [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 32,295,000,000  
Futures contract [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,207,135,000,000 761,112,000,000
Futures contract [member] | Derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,207,135,000,000 761,112,000,000
Futures contract [member] | Trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,207,135,000,000  
Futures contract [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Futures contract [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Futures contract [member] | Trading derivatives [member] | Interest rate contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,207,135,000,000  
Futures contract [member] | Non trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Forward rate agreements [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 974,666,000,000 574,289,000,000
Forward rate agreements [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 483,066,000,000  
Forward rate agreements [member] | Derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 974,666,000,000 574,289,000,000
Forward rate agreements [member] | Trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 974,087,000,000  
Forward rate agreements [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 942,703,000,000  
Forward rate agreements [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 31,384,000,000  
Forward rate agreements [member] | Trading derivatives [member] | Interest rate contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Forward rate agreements [member] | Trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 456,379,000,000  
Forward rate agreements [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 48,000,000  
Forward rate agreements [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 456,331,000,000  
Forward rate agreements [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Forward rate agreements [member] | Non trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 579,000,000  
Forward rate agreements [member] | Non trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 26,687,000,000  
Interest rate swap contract [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 22,142,506,000,000 19,839,245,000,000
Interest rate swap contract [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,826,687,000,000 1,692,601,000,000
Interest rate swap contract [member] | Derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 22,142,506,000,000 19,839,245,000,000
Interest rate swap contract [member] | Derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,826,687,000,000 1,692,601,000,000
Interest rate swap contract [member] | Trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 20,232,094,000,000  
Interest rate swap contract [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 19,608,951,000,000  
Interest rate swap contract [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 623,143,000,000  
Interest rate swap contract [member] | Trading derivatives [member] | Interest rate contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Interest rate swap contract [member] | Trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,824,527,000,000  
Interest rate swap contract [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Interest rate swap contract [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 1,824,527,000,000  
Interest rate swap contract [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Interest rate swap contract [member] | Non trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,910,412,000,000  
Interest rate swap contract [member] | Non trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 2,160,000,000  
Cross currency interest rate swap [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,898,178,000,000 1,669,577,000,000
Cross currency interest rate swap [member] | Derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,898,178,000,000 1,669,577,000,000
Cross currency interest rate swap [member] | Trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 1,716,271,000,000  
Cross currency interest rate swap [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Cross currency interest rate swap [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 1,716,271,000,000  
Cross currency interest rate swap [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Cross currency interest rate swap [member] | Non trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 181,907,000,000  
Options written [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 203,889,000,000 99,490,000,000
Options written [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 63,257,000,000 56,777,000,000
Options written [member] | Derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 203,889,000,000 99,490,000,000
Options written [member] | Derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 63,257,000,000 56,777,000,000
Options written [member] | Trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 203,784,000,000  
Options written [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Options written [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 150,130,000,000  
Options written [member] | Trading derivatives [member] | Interest rate contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 53,654,000,000  
Options written [member] | Trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 63,257,000,000  
Options written [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Options written [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 62,931,000,000  
Options written [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 326,000,000  
Options written [member] | Non trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 105,000,000  
Options written [member] | Non trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Options purchased [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 227,252,000,000 119,511,000,000
Options purchased [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 58,255,000,000 49,359,000,000
Options purchased [member] | Derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 227,252,000,000 119,511,000,000
Options purchased [member] | Derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 58,255,000,000 49,359,000,000
Options purchased [member] | Trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 227,249,000,000  
Options purchased [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Options purchased [member] | Trading derivatives [member] | Interest rate contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 171,046,000,000  
Options purchased [member] | Trading derivatives [member] | Interest rate contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 56,203,000,000  
Options purchased [member] | Trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 58,255,000,000  
Options purchased [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Options purchased [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 58,215,000,000  
Options purchased [member] | Trading derivatives [member] | Foreign exchange contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 40,000,000  
Options purchased [member] | Non trading derivatives [member] | Interest rate contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 3,000,000  
Options purchased [member] | Non trading derivatives [member] | Foreign exchange contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Credit default swaps-protection purchased [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 18,731,000,000 15,504,000,000
Credit default swaps-protection purchased [member] | Derivatives [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 18,731,000,000 15,504,000,000
Credit default swaps-protection purchased [member] | Trading derivatives [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 15,841,000,000  
Credit default swaps-protection purchased [member] | Trading derivatives [member] | Credit contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 13,907,000,000  
Credit default swaps-protection purchased [member] | Trading derivatives [member] | Credit contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 1,934,000,000  
Credit default swaps-protection purchased [member] | Trading derivatives [member] | Credit contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Credit default swaps-protection purchased [member] | Non trading derivatives [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 2,890,000,000  
Credit default swap-protection sold [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 2,218,000,000 1,893,000,000
Credit default swap-protection sold [member] | Derivatives [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 2,218,000,000 1,893,000,000
Credit default swap-protection sold [member] | Trading derivatives [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 2,218,000,000  
Credit default swap-protection sold [member] | Trading derivatives [member] | Credit contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 1,889,000,000  
Credit default swap-protection sold [member] | Trading derivatives [member] | Credit contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 329,000,000  
Credit default swap-protection sold [member] | Trading derivatives [member] | Credit contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Credit default swap-protection sold [member] | Non trading derivatives [member] | Credit contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Equity contracts [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 441,535,000,000 278,028,000,000
Equity contracts [member] | Derivatives [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 441,535,000,000 278,028,000,000
Equity contracts [member] | Trading derivatives [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 409,240,000,000  
Equity contracts [member] | Trading derivatives [member] | Other contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 0  
Equity contracts [member] | Trading derivatives [member] | Other contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 218,155,000,000  
Equity contracts [member] | Trading derivatives [member] | Other contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 191,085,000,000  
Equity contracts [member] | Non trading derivatives [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 32,295,000,000  
Commodity contracts [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 288,129,000,000 245,595,000,000
Commodity contracts [member] | Derivatives [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 288,129,000,000 $ 245,595,000,000
Commodity contracts [member] | Trading derivatives [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 288,129,000,000  
Commodity contracts [member] | Trading derivatives [member] | Other contracts [member] | Over-the-counter clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 174,000,000  
Commodity contracts [member] | Trading derivatives [member] | Other contracts [member] | Over-the-counter non-clearing house [member]    
Disclosure of financial assets [line items]    
Notional amount 99,416,000,000  
Commodity contracts [member] | Trading derivatives [member] | Other contracts [member] | Exchange traded contracts [member]    
Disclosure of financial assets [line items]    
Notional amount 188,539,000,000  
Commodity contracts [member] | Non trading derivatives [member] | Other contracts [member]    
Disclosure of financial assets [line items]    
Notional amount $ 0