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Business acquisitions, development projects and disposition transactions - Additional Information (Detail) $ in Thousands, $ in Thousands |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Feb. 15, 2024 USD ($) | Jun. 15, 2023 USD ($) | Dec. 29, 2022 USD ($) wind_project MWac | Jan. 01, 2022 USD ($) country | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2020 MWac | Dec. 29, 2022 CAD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Other net losses |  |  |  |  | $ 132,889 | $ 21,391 |  |
Gain on sale of renewable assets |  |  |  |  | 0 | 64,028 |  |
Operating Wind Facilities in the United States |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Equity interest (percent) |  |  | 49.00% |  |  |  |  | 49.00%
Number of ownership interests in wind facilities | wind_project |  |  | 3 |  |  |  |  |
Wind power capacity (megawatt AC) | MWac |  |  | 551 |  |  |  | 551 |
Blue Hill Wind Facility |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Equity interest (percent) |  |  | 80.00% |  |  |  |  | 80.00%
Wind power capacity (megawatt AC) | MWac |  |  | 175 |  |  |  |  |
Proceeds from sale of renewable assets |  |  | $ 277,500 |  |  |  |  | $ 108,610
Gain on sale of renewable assets |  |  | $ 62,828 |  |  |  |  |
Kentucky Power Company and AEP Kentucky Transmission Company, Inc. |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Other net losses |  |  |  |  | $ 46,527 |  |  |
New York Water Company, Inc |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Total purchase price |  |  |  | $ 609,000 |  |  |  |
Number of countries | country |  |  |  | 8 |  |  |  |
Intangible asset, useful life |  |  |  | 64 years 8 months 26 days |  |  |  |
Revenue |  |  |  |  |  | 125,370 |  |
Operating income |  |  |  |  |  | $ 21,776 |  |
Algonquin Power Fund (America) Inc | Deerfield II |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Debt repaid upon maturity |  | $ 158,550 |  |  |  |  |  |
Ownership interest acquired (percent) |  | 50.00% |  |  |  |  |  |
Total purchase price |  | $ 23,142 |  |  |  |  |  |
Tax equity funding |  | $ 98,955 |  |  |  |  |  |
Algonquin Power Fund (America) Inc | Sandy Ridge II Wind Facility | Subsequent Event |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Debt repaid upon maturity | $ 162,805 |  |  |  |  |  |  |
Ownership interest acquired (percent) | 50.00% |  |  |  |  |  |  |
Total purchase price | $ 8,456 |  |  |  |  |  |  |
Tax equity funding | $ 60,545 |  |  |  |  |  |  |

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