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Risk Management - Schedule of Maturity of Financial Liabilities (Detail) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Jan. 01, 2022
--- | --- | --- | ---
Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |  |
Long-term debt | $ 6,071 | $ 6,234 | $ 4,882
Capital instruments | 6,667 | 6,122 | 6,980
Derivatives | 11,730 | 14,289 | 10,038
Derivatives | 11,687 |  |
Deposits from Bank clients | 21,616 | 22,507 | $ 20,720
Lease liabilities | 350 |  |
Less than 1 year [Member] |  |  |
Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |  |
Long-term debt | 0 | 0 |
Capital instruments | 594 |  |
Derivatives | 1,561 | 2,656 |
Deposits from Bank clients | 16,814 |  |
Lease liabilities | 100 |  |
1 to 3 years [Member] |  |  |
Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |  |
Long-term debt | 1,672 |  |
Capital instruments | 0 |  |
Derivatives | 1,982 | 1,956 |
Deposits from Bank clients | 2,963 |  |
Lease liabilities | 133 |  |
3 to 5 years [Member] |  |  |
Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |  |
Long-term debt | 920 |  |
Capital instruments | 0 |  |
Derivatives | 717 | 1,146 |
Deposits from Bank clients | 1,839 |  |
Lease liabilities | 68 |  |
Over 5 years [Member] |  |  |
Disclosure Of Maturity Analysis For Financial Liabilities [line items] |  |  |
Long-term debt | 3,479 | 3,573 |
Capital instruments | 6,073 |  |
Derivatives | 7,427 | $ 8,531 |
Deposits from Bank clients | 0 |  |
Lease liabilities | $ 49 |  |

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