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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, 2023 | Dec. 31, 2022 | Jan. 01, 2022
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | $ 8,546,000,000 | $ 8,588,000,000 | $ 17,503,000,000
Derivative liabilities | 11,730,000,000 | 14,289,000,000 | $ 10,038,000,000
Derivative liabilities | 11,687,000,000 |  |
Remaining term to maturity (notional amounts) | 440,077,000,000 | 395,957,000,000 |
Credit equivalent amount | 1,661,000,000 | 2,002,000,000 |
Capital Requirement | 28,000,000 | 38,000,000 |
Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 8,546,000,000 | 8,588,000,000 |
Derivative liabilities | (11,687,000,000) | (14,289,000,000) |
Derivative liabilities | (11,687,000,000) |  |
Fair value, net | (3,141,000,000) | (5,701,000,000) |
Interest rate swaps [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 345,768,000,000 | 314,357,000,000 |
Credit equivalent amount | 308,000,000 | 491,000,000 |
Capital Requirement | 7,000,000 | 13,000,000 |
Interest rate swaps [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 6,319,000,000 | 6,414,000,000 |
Derivative liabilities | (10,016,000,000) | (12,822,000,000) |
Fair value, net | (3,697,000,000) | (6,408,000,000) |
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 |
Credit equivalent amount | 300,000,000 | 419,000,000 |
Capital Requirement | 7,000,000 | 9,000,000 |
Interest rate swaps [Member] | OTC swap contracts [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 5,295,000,000 | 5,992,000,000 |
Derivative liabilities | (6,850,000,000) | (8,135,000,000) |
Fair value, net |  | (2,143,000,000) |
Interest rate swaps [Member] | Cleared swap contracts [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 164,474,000,000 | 141,631,000,000 |
Interest rate swaps [Member] | Cleared swap contracts [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 220,000,000 | 254,000,000 |
Derivative liabilities | (180,000,000) | (219,000,000) |
Fair value, net | 40,000,000 | 35,000,000 |
Interest rate swaps [Member] | Forward contracts [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 33,991,000,000 | 28,414,000,000 |
Credit equivalent amount |  | 8,000,000 |
Interest rate swaps [Member] | Forward contracts [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 771,000,000 | 70,000,000 |
Derivative liabilities | (2,986,000,000) | (4,468,000,000) |
Fair value, net | (2,215,000,000) | (4,398,000,000) |
Interest rate swaps [Member] | Futures [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 9,449,000,000 | 11,772,000,000 |
Interest rate swaps [Member] | Options purchased [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 5,841,000,000 | 6,090,000,000 |
Credit equivalent amount | 8,000,000 | 64,000,000 |
Capital Requirement |  | 4,000,000 |
Interest rate swaps [Member] | Options purchased [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 33,000,000 | 98,000,000 |
Fair value, net | 33,000,000 | 98,000,000 |
Foreign exchange [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 70,138,000,000 | 60,525,000,000 |
Credit equivalent amount | 1,106,000,000 | 1,255,000,000 |
Capital Requirement | 19,000,000 | 23,000,000 |
Foreign exchange [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 2,141,000,000 | 2,293,000,000 |
Derivative liabilities | (2,478,000,000) | (2,104,000,000) |
Fair value, net | (337,000,000) | 189,000,000 |
Foreign exchange [Member] | Forward contracts [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 24,204,000,000 | 17,336,000,000 |
Credit equivalent amount | 19,000,000 | 89,000,000 |
Foreign exchange [Member] | Forward contracts [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 163,000,000 | 226,000,000 |
Derivative liabilities | (299,000,000) | (258,000,000) |
Fair value, net | (136,000,000) | (32,000,000) |
Foreign exchange [Member] | Futures [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 2,581,000,000 | 2,319,000,000 |
Foreign exchange [Member] | Swap contracts [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 43,353,000,000 | 40,870,000,000 |
Credit equivalent amount | 1,087,000,000 | 1,166,000,000 |
Capital Requirement | 19,000,000 | 23,000,000 |
Foreign exchange [Member] | Swap contracts [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 1,978,000,000 | 2,067,000,000 |
Derivative liabilities | (2,179,000,000) | (1,846,000,000) |
Fair value, net | (201,000,000) | 221,000,000 |
Credit derivatives [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 131,000,000 | 159,000,000 |
Credit derivatives [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 4,000,000 | 4,000,000 |
Fair value, net | 4,000,000 | 4,000,000 |
Equity contracts [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 24,171,000,000 | 21,075,000,000 |
Credit equivalent amount | 247,000,000 | 256,000,000 |
Capital Requirement | 2,000,000 | 2,000,000 |
Equity contracts [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 584,000,000 | 365,000,000 |
Derivative liabilities | (106,000,000) | (225,000,000) |
Fair value, net | 478,000,000 | 140,000,000 |
Equity contracts [Member] | Futures [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 4,040,000,000 | 3,813,000,000 |
Equity contracts [Member] | Options purchased [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 17,825,000,000 | 16,160,000,000 |
Credit equivalent amount | 215,000,000 | 232,000,000 |
Capital Requirement | 2,000,000 | 2,000,000 |
Equity contracts [Member] | Options purchased [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 562,000,000 | 335,000,000 |
Derivative liabilities | (28,000,000) | (218,000,000) |
Fair value, net | 534,000,000 | 117,000,000 |
Equity contracts [Member] | Swap contracts [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 2,175,000,000 | 943,000,000 |
Credit equivalent amount | 32,000,000 | 24,000,000 |
Equity contracts [Member] | Swap contracts [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 18,000,000 | 26,000,000 |
Derivative liabilities | (78,000,000) | (7,000,000) |
Fair value, net | (60,000,000) | 19,000,000 |
Financial Instruments [member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 440,077,000,000 | 395,957,000,000 |
Credit equivalent amount | 1,661,000,000 | 2,002,000,000 |
Capital Requirement | 28,000,000 | 38,000,000 |
Financial Instruments [member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 9,044,000,000 | 9,072,000,000 |
Derivative liabilities | (12,600,000,000) | (15,151,000,000) |
Fair value, net | (3,556,000,000) | (6,079,000,000) |
Accrued interest [Member] | Fair value [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 498,000,000 | 484,000,000 |
Derivative liabilities | (913,000,000) | (862,000,000) |
Fair value, net | (415,000,000) | (378,000,000) |
Less than 1 year [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 1,189,000,000 | 580,000,000 |
Derivative liabilities | 1,561,000,000 | 2,656,000,000 |
Remaining term to maturity (notional amounts) | 86,563,000,000 | 77,262,000,000 |
Less than 1 year [Member] | Interest rate swaps [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 37,332,000,000 | 38,572,000,000 |
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) | 4,645,000,000 | 8,817,000,000 |
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) | 4,634,000,000 | 2,494,000,000 |
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) | 17,809,000,000 | 14,290,000,000 |
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) | 9,449,000,000 | 11,772,000,000 |
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) | 795,000,000 | 1,199,000,000 |
Less than 1 year [Member] | Foreign exchange [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 28,895,000,000 | 21,681,000,000 |
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) | 24,204,000,000 | 17,336,000,000 |
Less than 1 year [Member] | Foreign exchange [Member] | Futures [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 2,581,000,000 | 2,319,000,000 |
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) | 2,110,000,000 | 2,026,000,000 |
Less than 1 year [Member] | Credit derivatives [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 14,000,000 | 15,000,000 |
Less than 1 year [Member] | Equity contracts [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 20,336,000,000 | 17,009,000,000 |
Less than 1 year [Member] | Equity contracts [Member] | Futures [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 4,040,000,000 | 3,813,000,000 |
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) | 14,830,000,000 | 12,634,000,000 |
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) | 1,452,000,000 | 547,000,000 |
Less than 1 year [Member] | Financial Instruments [member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 86,563,000,000 | 77,262,000,000 |
1 to 3 years [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 603,000,000 | 556,000,000 |
Derivative liabilities | 1,982,000,000 | 1,956,000,000 |
3 to 5 years [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 573,000,000 | 556,000,000 |
Derivative liabilities | 717,000,000 | 1,146,000,000 |
1 to 5 years [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 87,166,000,000 | 65,612,000,000 |
1 to 5 years [Member] | Interest rate swaps [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 71,549,000,000 | 51,071,000,000 |
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) | 20,923,000,000 | 19,253,000,000 |
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) | 33,082,000,000 | 16,823,000,000 |
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) | 16,182,000,000 | 13,926,000,000 |
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) | 1,362,000,000 | 1,069,000,000 |
1 to 5 years [Member] | Foreign exchange [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 11,782,000,000 | 10,475,000,000 |
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) | 11,782,000,000 | 10,475,000,000 |
1 to 5 years [Member] | Credit derivatives [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 117,000,000 | 144,000,000 |
1 to 5 years [Member] | Equity contracts [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 3,835,000,000 | 4,066,000,000 |
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) | 2,995,000,000 | 3,526,000,000 |
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) | 723,000,000 | 396,000,000 |
1 to 5 years [Member] | Financial Instruments [member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 87,166,000,000 | 65,612,000,000 |
Over 5 years [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Derivative assets | 6,181,000,000 | 6,896,000,000 |
Derivative liabilities | 7,427,000,000 | 8,531,000,000 |
Remaining term to maturity (notional amounts) | 266,348,000,000 | 253,083,000,000 |
Over 5 years [Member] | Interest rate swaps [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 236,887,000,000 | 224,714,000,000 |
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 |
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) | 126,758,000,000 | 122,314,000,000 |
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 |
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) | 3,684,000,000 | 3,822,000,000 |
Over 5 years [Member] | Foreign exchange [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 29,461,000,000 | 28,369,000,000 |
Over 5 years [Member] | Foreign exchange [Member] | Swap contracts [Member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | 29,461,000,000 | 28,369,000,000 |
Over 5 years [Member] | Financial Instruments [member] |  |  |
Disclosure of detailed information about hedges [Line Items] |  |  |
Remaining term to maturity (notional amounts) | $ 266,348,000,000 | $ 253,083,000,000 |

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