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Derivative and Hedging Instruments - Summary of Fair Values of Derivative Instruments by Remaining Term to Maturity (Detail) - CAD ($) | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | $ 8,588,000,000 | $ 17,503,000,000
Derivative liabilities | 14,289,000,000 | 10,038,000,000
Remaining term to maturity (notional amounts) | 395,957,000,000 | 440,098,000,000
Credit equivalent amount | 2,002,000,000 | 4,176,000,000
Capital Requirement | 38,000,000 | 76,000,000
Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 8,588,000,000 | 17,503,000,000
Derivative liabilities | (14,289,000,000) | (10,038,000,000)
Fair value, net | (5,701,000,000) | 7,465,000,000
Interest rate swaps [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 314,357,000,000 | 354,376,000,000
Credit equivalent amount | 491,000,000 | 1,994,000,000
Capital Requirement | 13,000,000 | 43,000,000
Interest rate swaps [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 6,414,000,000 | 15,693,000,000
Derivative liabilities |  | (8,653,000,000)
Fair value, net | (6,408,000,000) | 7,040,000,000
Interest rate swaps [Member] | OTC swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 126,450,000,000 | 117,030,000,000
Credit equivalent amount | 419,000,000 | 1,582,000,000
Capital Requirement | 9,000,000 | 29,000,000
Interest rate swaps [Member] | OTC swap contracts [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 5,992,000,000 | 12,112,000,000
Derivative liabilities | (8,135,000,000) | (7,717,000,000)
Fair value, net | (2,143,000,000) | 4,395,000,000
Interest rate swaps [Member] | Cleared swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 141,631,000,000 | 183,526,000,000
Interest rate swaps [Member] | Cleared swap contracts [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 254,000,000 | 441,000,000
Derivative liabilities | (219,000,000) | (453,000,000)
Fair value, net | 35,000,000 | (12,000,000)
Interest rate swaps [Member] | Forward contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 28,414,000,000 | 31,168,000,000
Credit equivalent amount | 8,000,000 | 299,000,000
Capital Requirement |  | 5,000,000
Interest rate swaps [Member] | Forward contracts [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 70,000,000 | 2,625,000,000
Derivative liabilities | (4,468,000,000) | (483,000,000)
Fair value, net | (4,398,000,000) | 2,142,000,000
Interest rate swaps [Member] | Futures [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 11,772,000,000 | 11,944,000,000
Interest rate swaps [Member] | Futures [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Fair value, net | 0 |
Interest rate swaps [Member] | Options purchased [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 6,090,000,000 | 10,708,000,000
Credit equivalent amount | 64,000,000 | 113,000,000
Capital Requirement | 4,000,000 | 9,000,000
Interest rate swaps [Member] | Options purchased [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 98,000,000 | 515,000,000
Fair value, net | 98,000,000 | 515,000,000
Foreign exchange [Member] | Forward contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 17,336,000,000 | 14,798,000,000
Credit equivalent amount | 89,000,000 | 85,000,000
Foreign exchange [Member] | Forward contracts [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 226,000,000 | 58,000,000
Derivative liabilities | (258,000,000) | (79,000,000)
Fair value, net | (32,000,000) | (21,000,000)
Foreign exchange [Member] | Futures [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 2,319,000,000 | 3,086,000,000
Foreign exchange [Member] | Futures [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Fair value, net | 0 |
Foreign exchange [Member] | Swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 40,870,000,000 | 37,713,000,000
Credit equivalent amount | 1,166,000,000 | 1,302,000,000
Capital Requirement | 23,000,000 | 25,000,000
Foreign exchange [Member] | Swap contracts [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 2,067,000,000 | 801,000,000
Derivative liabilities | (1,846,000,000) | (2,181,000,000)
Fair value, net | 221,000,000 | (1,380,000,000)
Credit derivatives [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 159,000,000 | 44,000,000
Credit derivatives [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 4,000,000 | 1,000,000
Fair value, net | 4,000,000 | 1,000,000
Equity contracts [Member] | Futures [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 3,813,000,000 | 11,359,000,000
Equity contracts [Member] | Options purchased [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 16,160,000,000 | 17,730,000,000
Credit equivalent amount | 232,000,000 | 766,000,000
Capital Requirement | 2,000,000 | 8,000,000
Equity contracts [Member] | Options purchased [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 335,000,000 | 1,616,000,000
Derivative liabilities | (218,000,000) | (17,000,000)
Fair value, net | 117,000,000 | 1,599,000,000
Equity contracts [Member] | Swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 943,000,000 | 992,000,000
Credit equivalent amount | 24,000,000 | 29,000,000
Equity contracts [Member] | Swap contracts [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 26,000,000 | 57,000,000
Derivative liabilities | (7,000,000) | (10,000,000)
Fair value, net | 19,000,000 | 47,000,000
Financial Instruments [member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 395,957,000,000 | 440,098,000,000
Credit equivalent amount | 2,002,000,000 | 4,176,000,000
Capital Requirement | 38,000,000 | 76,000,000
Financial Instruments [member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 9,072,000,000 | 18,226,000,000
Derivative liabilities | (15,151,000,000) | (10,940,000,000)
Fair value, net | (6,079,000,000) | 7,286,000,000
Accrued interest [Member] | Fair value [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 484,000,000 | 723,000,000
Derivative liabilities | (862,000,000) | (902,000,000)
Fair value, net | (378,000,000) | (179,000,000)
Less than 1 year [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 580,000,000 | 2,500,000,000
Derivative liabilities | 2,656,000,000 | 294,000,000
Remaining term to maturity (notional amounts) | 77,262,000,000 | 97,100,000,000
Less than 1 year [Member] | Interest rate swaps [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 38,572,000,000 | 54,262,000,000
Less than 1 year [Member] | Interest rate swaps [Member] | OTC swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 8,817,000,000 | 4,554,000,000
Less than 1 year [Member] | Interest rate swaps [Member] | Cleared swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 2,494,000,000 | 21,722,000,000
Less than 1 year [Member] | Interest rate swaps [Member] | Forward contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 14,290,000,000 | 14,636,000,000
Less than 1 year [Member] | Interest rate swaps [Member] | Futures [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 11,772,000,000 | 11,944,000,000
Less than 1 year [Member] | Interest rate swaps [Member] | Options purchased [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 1,199,000,000 | 1,406,000,000
Less than 1 year [Member] | Foreign exchange [Member] | Forward contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 17,336,000,000 | 14,798,000,000
Less than 1 year [Member] | Foreign exchange [Member] | Futures [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 2,319,000,000 | 3,086,000,000
Less than 1 year [Member] | Foreign exchange [Member] | Swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 2,026,000,000 | 1,941,000,000
Less than 1 year [Member] | Credit derivatives [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 15,000,000 | 11,000,000
Less than 1 year [Member] | Equity contracts [Member] | Futures [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 3,813,000,000 | 11,359,000,000
Less than 1 year [Member] | Equity contracts [Member] | Options purchased [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 12,634,000,000 | 10,974,000,000
Less than 1 year [Member] | Equity contracts [Member] | Swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 547,000,000 | 669,000,000
Less than 1 year [Member] | Financial Instruments [member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 77,262,000,000 | 97,100,000,000
1 to 3 years [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 556,000,000 | 1,803,000,000
Derivative liabilities | 1,956,000,000 | 387,000,000
3 to 5 years [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 556,000,000 | 1,000,000,000
Derivative liabilities | 1,146,000,000 | 379,000,000
1 to 5 years [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 65,612,000,000 | 84,070,000,000
1 to 5 years [Member] | Interest rate swaps [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 51,071,000,000 | 68,129,000,000
1 to 5 years [Member] | Interest rate swaps [Member] | OTC swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 19,253,000,000 | 21,884,000,000
1 to 5 years [Member] | Interest rate swaps [Member] | Cleared swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 16,823,000,000 | 27,665,000,000
1 to 5 years [Member] | Interest rate swaps [Member] | Forward contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 13,926,000,000 | 15,791,000,000
1 to 5 years [Member] | Interest rate swaps [Member] | Options purchased [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 1,069,000,000 | 2,789,000,000
1 to 5 years [Member] | Foreign exchange [Member] | Forward contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) |  | 0
1 to 5 years [Member] | Foreign exchange [Member] | Swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 10,475,000,000 | 8,869,000,000
1 to 5 years [Member] | Credit derivatives [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 144,000,000 | 33,000,000
1 to 5 years [Member] | Equity contracts [Member] | Options purchased [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 3,526,000,000 | 6,716,000,000
1 to 5 years [Member] | Equity contracts [Member] | Swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 396,000,000 | 323,000,000
1 to 5 years [Member] | Financial Instruments [member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 65,612,000,000 | 84,070,000,000
Over 5 years [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Derivative assets | 6,896,000,000 | 12,200,000,000
Derivative liabilities | 8,531,000,000 | 8,978,000,000
Remaining term to maturity (notional amounts) | 253,083,000,000 | 258,928,000,000
Over 5 years [Member] | Interest rate swaps [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 224,714,000,000 | 231,985,000,000
Over 5 years [Member] | Interest rate swaps [Member] | OTC swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 98,380,000,000 | 90,592,000,000
Over 5 years [Member] | Interest rate swaps [Member] | Cleared swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 122,314,000,000 | 134,139,000,000
Over 5 years [Member] | Interest rate swaps [Member] | Forward contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 198,000,000 | 741,000,000
Over 5 years [Member] | Interest rate swaps [Member] | Options purchased [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 3,822,000,000 | 6,513,000,000
Over 5 years [Member] | Foreign exchange [Member] | Swap contracts [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | 28,369,000,000 | 26,903,000,000
Over 5 years [Member] | Equity contracts [Member] | Options purchased [Member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) |  | 40,000,000
Over 5 years [Member] | Financial Instruments [member] |  |
Disclosure of detailed information about hedges [Line Items] |  |
Remaining term to maturity (notional amounts) | $ 253,083,000,000 | $ 258,928,000,000

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