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Segments Disclosures - Additions to non-current assets (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of operating segments [line items] |  |  |
PP&E | $ 918 | $ 480 | $ 486
Intangible assets | 31 | 9 | 14
Corporate |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 75 | 28 | 13
Intangible assets | 9 | 8 | 13
Operating segments | Hydro |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 36 | 29 | 22
Intangible assets | 0 | 0 | 0
Operating segments | Wind and Solar |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 745 | 166 | 174
Intangible assets | 19 | 0 | 0
Operating segments | Gas |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 43 | 167 | 199
Intangible assets | 0 | 0 | 0
Operating segments | Energy Transition |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 19 | 90 | 78
Intangible assets | 0 | 1 | 1
Operating segments | Energy Marketing |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 0 | 0 | 0
Intangible assets | $ 3 | $ 0 | $ 0

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