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Segments Disclosures - Selected Consolidated Statements of Financial Position Information (Details) - CAD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Disclosure of operating segments [line items] |  |  |
PP&E | $ 5,556 | $ 5,320 | $ 5,822
Right-of-use assets | 126 | 95 | 141
Intangible assets | 252 | 256 | $ 313
Goodwill | 464 | 463 |
Wind and Solar |  |  |
Disclosure of operating segments [line items] |  |  |
Goodwill | 176 | 175 |
Energy Marketing |  |  |
Disclosure of operating segments [line items] |  |  |
Goodwill | 30 | 30 |
Corporate |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 111 | 33 |
Right-of-use assets | 14 | 18 |
Intangible assets | 31 | 36 |
Goodwill | 0 | 0 |
Operating segments | Hydro |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 437 | 466 |
Right-of-use assets | 6 | 5 |
Intangible assets | 2 | 3 |
Goodwill | 258 | 258 |
Operating segments | Wind and Solar |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 2,837 | 2,304 |
Right-of-use assets | 98 | 64 |
Intangible assets | 157 | 147 |
Goodwill | 176 | 175 |
Operating segments | Gas |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 1,858 | 2,036 |
Right-of-use assets | 6 | 7 |
Intangible assets | 49 | 56 |
Goodwill | 0 | 0 |
Operating segments | Energy Transition |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 313 | 481 |
Right-of-use assets | 2 | 1 |
Intangible assets | 5 | 9 |
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 | 8 | 5 |
Goodwill | $ 30 | $ 30 |

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