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Other Income, Net (Components of Other Expense, Net) (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Other Income, Net [Abstract] |  |
Gain on sale of LIL, net of transaction costs | $ 182 | $ 0
AFUDC | 53 | 38
Pension non-current service cost recovery | 35 | 35
Interest income | 23 | 43
Transaction costs related to the pending sale of NMGC | (25) | 0
Charges related to wind-down costs and certain asset impairments | (29) | 0
FX (losses) gains | (58) | 20
Other | 22 | 22
Other income, net | $ 203 | $ 158

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