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Segments Disclosures - Additions to non-current assets (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of operating segments [line items] |  |  |
Property, plant and equipment expenditures | $ 480 | $ 486 | $ 417
Purchase of intangible assets | 9 | 14 | 14
Corporate |  |  |
Disclosure of operating segments [line items] |  |  |
Property, plant and equipment expenditures | 28 | 13 | 1
Purchase of intangible assets | 8 | 13 | 12
Operating segments | Hydro |  |  |
Disclosure of operating segments [line items] |  |  |
Property, plant and equipment expenditures | 29 | 22 | 23
Purchase of intangible assets | 0 | 0 | 0
Operating segments | Wind and Solar |  |  |
Disclosure of operating segments [line items] |  |  |
Property, plant and equipment expenditures | 166 | 174 | 229
Purchase of intangible assets | 0 | 0 | 0
Operating segments | Gas |  |  |
Disclosure of operating segments [line items] |  |  |
Property, plant and equipment expenditures | 167 | 199 | 74
Purchase of intangible assets | 0 | 0 | 0
Operating segments | Energy Transition |  |  |
Disclosure of operating segments [line items] |  |  |
Property, plant and equipment expenditures | 90 | 78 | 90
Purchase of intangible assets | 1 | 1 | 2
Operating segments | Energy Marketing |  |  |
Disclosure of operating segments [line items] |  |  |
Property, plant and equipment expenditures | 0 | 0 | 0
Purchase of intangible assets | $ 0 | $ 0 | $ 0

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