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v3.25.0.1

Employee Benefit Plans (Amounts Recognized in AOCI and Regulatory Assets) (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Change in AOCI and Regulatory Assets |  |
Beginning Balance | $ 12,088 | $ 11,441
Ending Balance | 13,291 | 12,088
Regulatory assets | 3,427 | 3,105
Defined benefit pension plans |  |
Change in AOCI and Regulatory Assets |  |
Beginning Balance | 61 |
Amortized in current period | 3 | 1
Ending Balance | (9) | 61
Actuarial (gains) losses | (17) | 53
Past service gains | 0 | 0
Deferred income tax expense (recovery) | 8 | 8
AOCI, net of tax | (9) | 61
Regulatory assets | 363 | 324
AOCI, net of tax and regulatory assets | 354 | 385
Defined benefit pension plans | Regulatory | Assets |  |
Change in AOCI and Regulatory Assets |  |
Beginning Balance | 324 |
Amortized in current period | (9) |
Current year additions (reductions) | 19 |
Change in FX rate | 29 |
Ending Balance | 363 | 324
Defined benefit pension plans | Actuarial (gains) losses |  |
Change in AOCI and Regulatory Assets |  |
Beginning Balance | 53 |
Amortized in current period | (3) |
Current year additions (reductions) | (67) |
Change in FX rate | 0 |
Ending Balance | (17) | 53
Defined benefit pension plans | Past service costs (gains) |  |
Change in AOCI and Regulatory Assets |  |
Beginning Balance | 0 |
Amortized in current period | 0 |
Current year additions (reductions) | 0 |
Change in FX rate | 0 |
Ending Balance | 0 | 0
Non-pension Benefit Plans |  |
Change in AOCI and Regulatory Assets |  |
Beginning Balance | (9) |
Amortized in current period | (2) | (3)
Ending Balance | (7) | (9)
Actuarial (gains) losses | (8) | (8)
Past service gains | 0 | (2)
Deferred income tax expense (recovery) | 1 | 1
AOCI, net of tax | (7) | (9)
Regulatory assets | 29 | 29
AOCI, net of tax and regulatory assets | 22 | 20
Non-pension Benefit Plans | Regulatory | Assets |  |
Change in AOCI and Regulatory Assets |  |
Beginning Balance | 29 |
Amortized in current period | 2 |
Current year additions (reductions) | (5) |
Change in FX rate | 3 |
Ending Balance | 29 | 29
Non-pension Benefit Plans | Actuarial (gains) losses |  |
Change in AOCI and Regulatory Assets |  |
Beginning Balance | (8) |
Amortized in current period | 1 |
Current year additions (reductions) | (1) |
Change in FX rate | 0 |
Ending Balance | (8) | (8)
Non-pension Benefit Plans | Actuarial (gains) losses | Assets |  |
Change in AOCI and Regulatory Assets |  |
Amortized in current period | 2 |
Current year additions (reductions) | 0 |
Change in FX rate | 0 |
Non-pension Benefit Plans | Past service costs (gains) |  |
Change in AOCI and Regulatory Assets |  |
Beginning Balance | (2) |
Amortized in current period | (2) |
Current year additions (reductions) | 0 |
Change in FX rate | 0 |
Ending Balance | $ 0 | $ (2)

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