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Supplementary Cash Flow Information - Summary of Supplementary Cash Flow Information (Detail) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Disclosure Of Supplementary Cash Flow Information [Abstract] |  |
Total Current Assets | $ 10,434 | $ 9,708
Total Current Liabilities | 7,362 | 6,210
Working Capital | $ 3,072 | $ 3,498

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