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Long-Term Debt - Aggregate Maturities of Long-term Debt (Detail) - CAD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure of detailed information about borrowings [Line Items] |  |
Long-term debt | $ 6,234 | $ 4,882
Three to Five years [Member] |  |
Disclosure of detailed information about borrowings [Line Items] |  |
Long-term debt | 2,661 | 1,605
Over 5 years [Member] |  |
Disclosure of detailed information about borrowings [Line Items] |  |
Long-term debt | $ 3,573 | $ 3,277

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