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OTHER INCOME/(EXPENSE) (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Other Income and Expenses [Abstract] |  |  |
Realized foreign currency gain/(loss) | $ 121 | $ (129) | $ 92
Unrealized foreign currency gain/(loss) | (2,199) | 821 | (1,094)
Net defined pension and OPEB credit | 188 | 135 | 239
Other | 564 | 397 | 174
Total | $ (1,326) | $ 1,224 | $ (589)

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