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Segments Disclosures - Selected Consolidated Statements of Financial Position Information (Details) - CAD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Disclosure of operating segments [line items] |  |  |
PP&E | $ 5,320 | $ 5,822 | $ 6,207
Right-of-use assets | 95 | 141 | 146
Intangible assets | 256 | 313 | $ 318
Goodwill | 463 | 463 |
Wind and Solar |  |  |
Disclosure of operating segments [line items] |  |  |
Goodwill | 175 | 175 |
Energy Marketing |  |  |
Disclosure of operating segments [line items] |  |  |
Goodwill | 30 | 30 |
Corporate |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 33 | 16 |
Right-of-use assets | 18 | 22 |
Intangible assets | 36 | 41 |
Goodwill | 0 | 0 |
Operating segments | Hydro |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 466 | 467 |
Right-of-use assets | 5 | 6 |
Intangible assets | 3 | 4 |
Goodwill | 258 | 258 |
Operating segments | Wind and Solar |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 2,304 | 2,005 |
Right-of-use assets | 64 | 55 |
Intangible assets | 147 | 159 |
Goodwill | 175 | 175 |
Operating segments | Gas |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 2,036 | 2,102 |
Right-of-use assets | 7 | 5 |
Intangible assets | 56 | 66 |
Goodwill | 0 | 0 |
Operating segments | Energy Transition |  |  |
Disclosure of operating segments [line items] |  |  |
PP&E | 481 | 1,232 |
Right-of-use assets | 1 | 53 |
Intangible assets | 9 | 36 |
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 | 5 | 7 |
Goodwill | $ 30 | $ 30 |

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