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Financial Instrument Risk Management - Notional Amount of Derivative Financial Instruments (Details) - CAD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | $ 173,735 | $ 168,785
Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 65,966 | 62,792
Swap contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 835 | 912
Over-the-counter interest rate contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 100 | 6
Over-the-counter interest rate contracts | Interest rate swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 17,749 | 17,675
Over-the-counter interest rate contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 5,849 | 6,288
Over-the-counter interest rate contracts | Options written | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 461 | 465
Over-the-counter foreign exchange contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 13,921 | 12,236
Over-the-counter foreign exchange contracts | Foreign currency swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 19,873 | 18,524
Over-the-counter other contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 317 | 307
Over-the-counter other contracts | Swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 446 | 171
Over-the-counter other contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 279 | 127
Over-the-counter other contracts | Credit derivatives | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 835 | 912
Exchange-traded interest rate contracts | Futures contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 3,818 | 3,389
Exchange-traded equity contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 213 | 127
Exchange-traded equity contracts | Options written | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 12
Exchange-traded equity contracts | Futures contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 2,105 | 2,553
Under 1 Year | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 21,123 | 21,909
Under 1 Year | Over-the-counter interest rate contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 94 | 0
Under 1 Year | Over-the-counter interest rate contracts | Interest rate swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,273 | 1,010
Under 1 Year | Over-the-counter interest rate contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 878 | 757
Under 1 Year | Over-the-counter interest rate contracts | Options written | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Under 1 Year | Over-the-counter foreign exchange contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 10,824 | 12,205
Under 1 Year | Over-the-counter foreign exchange contracts | Foreign currency swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 725 | 1,260
Under 1 Year | Over-the-counter other contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 154 | 132
Under 1 Year | Over-the-counter other contracts | Swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 446 | 170
Under 1 Year | Over-the-counter other contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 271 | 119
Under 1 Year | Over-the-counter other contracts | Credit derivatives | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 322 | 175
Under 1 Year | Exchange-traded interest rate contracts | Futures contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 3,818 | 3,389
Under 1 Year | Exchange-traded equity contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 213 | 127
Under 1 Year | Exchange-traded equity contracts | Options written | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 12
Under 1 Year | Exchange-traded equity contracts | Futures contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 2,105 | 2,553
1 to 5 Years | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 13,633 | 10,829
1 to 5 Years | Over-the-counter interest rate contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 6 | 6
1 to 5 Years | Over-the-counter interest rate contracts | Interest rate swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 3,434 | 3,363
1 to 5 Years | Over-the-counter interest rate contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 3,297 | 3,246
1 to 5 Years | Over-the-counter interest rate contracts | Options written | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 461 | 465
1 to 5 Years | Over-the-counter foreign exchange contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 3,097 | 31
1 to 5 Years | Over-the-counter foreign exchange contracts | Foreign currency swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 2,654 | 2,797
1 to 5 Years | Over-the-counter other contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 163 | 175
1 to 5 Years | Over-the-counter other contracts | Swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 1
1 to 5 Years | Over-the-counter other contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 8 | 8
1 to 5 Years | Over-the-counter other contracts | Credit derivatives | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 513 | 737
1 to 5 Years | Exchange-traded interest rate contracts | Futures contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
1 to 5 Years | Exchange-traded equity contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
1 to 5 Years | Exchange-traded equity contracts | Options written | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
1 to 5 Years | Exchange-traded equity contracts | Futures contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 31,210 | 30,054
Over 5 Years | Over-the-counter interest rate contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Over-the-counter interest rate contracts | Interest rate swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 13,042 | 13,302
Over 5 Years | Over-the-counter interest rate contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 1,674 | 2,285
Over 5 Years | Over-the-counter interest rate contracts | Options written | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Over-the-counter foreign exchange contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Over-the-counter foreign exchange contracts | Foreign currency swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 16,494 | 14,467
Over 5 Years | Over-the-counter other contracts | Forward contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Over-the-counter other contracts | Swap contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Over-the-counter other contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Over-the-counter other contracts | Credit derivatives | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Exchange-traded interest rate contracts | Futures contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Exchange-traded equity contracts | Options purchased | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Exchange-traded equity contracts | Options written | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | 0 | 0
Over 5 Years | Exchange-traded equity contracts | Futures contracts | Derivative assets |  |
Disclosure of detailed information about financial instruments [line items] |  |
Financial assets | $ 0 | $ 0

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