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Investments - Narrative (Details) $ in Millions, $ in Millions |  |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Apr. 24, 2023 CAD ($) MW | May 06, 2022 USD ($) | Nov. 30, 2020 | Dec. 31, 2023 CAD ($) MW | Dec. 31, 2022 USD ($) | Dec. 31, 2022 CAD ($) | Feb. 01, 2022 CAD ($)
Investment [Line Items] |  |  |  |  |  |  |
Equity investment |  |  |  | $ 138 |  | $ 129 |
EMG |  |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  | 3000.00% |  |  |  |
Contingent amount paid |  |  |  |  | $ 3.5 |  |
Skookumchuck |  |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |  |
Ownership interest (as a percent) |  |  |  | 4900.00% |  |  |
Capacity of facility (in megawatts) | MW |  |  |  | 136.8 |  |  |
PPA, period |  |  |  | 20 years |  |  |
Tent Mountain |  |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |  |
Ownership interest (as a percent) | 5000.00% |  |  |  |  |  |
Capacity of facility (in megawatts) | MW | 320 |  |  |  |  |  |
Purchase price | $ 8 |  |  |  |  |  |
Aggregate consideration |  |  |  | $ 2 |  |  |
Contingent consideration | $ 17 |  |  |  |  |  |
Energy Impact Partners |  |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |  |
Committed investment |  | $ 25.0 |  |  |  |  |
Committed investment, period |  | 4 years |  |  |  |  |
Ekona | Class B Preferred Shares |  |  |  |  |  |  |
Investment [Line Items] |  |  |  |  |  |  |
Equity investment |  |  |  |  |  |  | $ 2

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