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Segments Disclosures - Selected Consolidated Statements of Financial Position Information (Details) - CAD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | --- | ---
Disclosure of operating segments [line items] |  |  |
PP&E | $ 6,020 | $ 5,714 | $ 5,556
Right-of-use assets | 120 | 117 | 126
Intangible assets | 281 | 223 | $ 252
Goodwill | 517 | 464 |
Wind and Solar |  |  |
Disclosure of operating segments [line items] |  |  |
Goodwill | 178 | 176 |
Gas |  |  |
Disclosure of operating segments [line items] |  |  |
Goodwill | 51 | 0 |
Energy Marketing |  |  |
Disclosure of operating segments [line items] |  |  |
Goodwill | 30 | 30 |
Operating segments | Hydro |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 501 | 462 |
Right-of-use assets | 7 | 7 |
Intangible assets | 3 | 2 |
Goodwill | 258 | 258 |
Operating segments | Wind and Solar |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 3,428 | 3,360 |
Right-of-use assets | 96 | 94 |
Intangible assets | 133 | 141 |
Goodwill | 178 | 176 |
Operating segments | Gas |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 1,805 | 1,543 |
Right-of-use assets | 6 | 5 |
Intangible assets | 108 | 40 |
Goodwill | 51 | 0 |
Operating segments | Energy Transition |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 206 | 251 |
Right-of-use assets | 0 | 0 |
Intangible assets | 4 | 4 |
Goodwill | 0 | 0 |
Operating segments | Energy Marketing |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 0 | 0 |
Right-of-use assets | 0 | 0 |
Intangible assets | 3 | 5 |
Goodwill | 30 | 30 |
Operating segments | Corporate |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 80 | 98 |
Right-of-use assets | 11 | 11 |
Intangible assets | 30 | 31 |
Goodwill | $ 0 | $ 0 |

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