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Financial instruments - Additional Information (Detail) |  |  | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jul. 31, 2023 USD ($) | Mar. 13, 2023 USD ($) | Dec. 31, 2023 USD ($) MWh MMBTU $ / MWh $ / shares | Dec. 31, 2023 CAD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2023 CAD ($) MWh MMBTU | Sep. 29, 2023 USD ($) | Dec. 31, 2022 CAD ($) | Dec. 17, 2022 MWh $ / MWh | Apr. 09, 2021 CAD ($) | May 23, 2019 USD ($)
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gain (loss) |  |  | $ (5,386,000) |  | $ (23,502,000) |  |  |  |  |  |  |
Revenue collection period |  |  | 45 days | 45 days |  |  |  |  |  |  |  |
Accounts receivable |  |  | $ 554,438,000 |  |  |  |  |  |  |  |  |
Cash on hand |  |  | 56,147,000 |  |  |  |  |  |  |  |  |
Liquidity available under the facilities |  |  | 1,200,000,000 |  | 2,515,600,000 |  |  |  |  |  |  |
Revolving and Term Credit Facilities |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Liquidity available under the facilities |  |  | 945,853,000 |  |  |  |  |  |  |  |  |
Regulated Services Group |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable |  |  | 364,084,000 |  |  |  |  |  |  |  |  |
Designated as a hedge |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amortization of AOCI gains frozen as a result of hedge dedesignation |  |  | 606,000 |  | (18,561,000) |  |  |  |  |  |  |
Senior Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt repaid upon maturity | $ 75,000,000 | $ 15,000,000 |  |  |  |  |  |  |  |  |  |
U.S. dollar Subordinated unsecured notes | Senior Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Par value |  |  |  |  |  |  | $ 300,000,000 |  | $ 300,000,000 |  |  | $ 350,000,000
Canadian dollar Senior unsecured notes | Blue Hill Wind Facility |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cross-currency interest rate swap |  |  |  |  |  |  |  |  | $ 489,506,000 |  |  |
Gain (loss) on sale of derivatives |  |  |  | $ 9,732,000 |  |  |  |  |  |  |  |
Canadian dollar Senior unsecured notes | Senior Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Par value |  |  |  |  |  |  | $ 1,200,000,000 |  |  |  |  |
Non-regulated Energy Sales |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains (loss) in AOCI to be reclassified |  |  | $ (25,895,000) |  |  |  |  |  |  |  |  |
Swap |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Commodity volumes, gas | MMBTU |  |  | 2,117,039 |  |  |  | 2,117,039 |  |  |  |  |
Canadian Investments and Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gain (loss) |  |  | $ (12,330,000) |  | 2,262,000 |  |  |  |  |  |  |
Foreign exchange contract |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gain (loss) |  |  | 6,976,000 |  | 22,091,000 |  |  |  |  |  |  |
Cross-currency interest rate swap |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt repaid upon maturity |  |  |  | $ 200,000,000 |  | $ 150,000,000 |  |  |  |  |  |
Currency Swap |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gain (loss) |  |  | 5,959,000 |  | (11,082,000) |  |  |  |  |  |  |
Currency Swap | U.S. dollar Subordinated unsecured notes | Senior Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gain (loss) |  |  | $ 8,420,000 |  | $ (13,374,000) |  |  |  |  |  |  |
Currency Swap | Canadian dollar Senior unsecured notes | Senior Unsecured Notes |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Par value |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |
Interest rate swaps designated as a hedge |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional quantity |  |  |  |  |  |  |  | $ 390,000,000 |  |  |  |
Transmission congestion rights |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional quantity (MW-hrs) | MWh |  |  | 5,486,961 |  |  |  | 5,486,961 |  |  |  |  |
Interest Rate Cap |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional quantity (MW-hrs) | MWh |  |  |  |  |  |  |  |  |  | 516,202 |  |
Receive average prices (per MW-hr) | $ / MWh |  |  |  |  |  |  |  |  |  | 25.15 |  |
Minimum | Atlantica Yield Energy Solutions Canada Inc. (b) | Measurement Input, Discount Rate |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  |  | 0.0800 |  |  |  | 0.0800 |  |  |  |  |
Minimum | Atlantica Yield Energy Solutions Canada, Inc | Measurement Input, Price Volatility |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  |  | 0.2747 |  |  |  | 0.2747 |  |  |  |  |
Minimum | Energy contracts |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Forward price | $ / MWh |  |  | 26.32 |  |  |  |  |  |  |  |  |
Derivative auction price (in USD per share) | $ / shares |  |  | $ 0 |  |  |  |  |  |  |  |  |
Minimum | Transmission congestion rights |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Receive average prices (per MW-hr) | $ / MWh |  |  | 0.55 |  |  |  |  |  |  |  |  |
Maximum | Atlantica Yield Energy Solutions Canada Inc. (b) | Measurement Input, Discount Rate |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  |  | 0.0850 |  |  |  | 0.0850 |  |  |  |  |
Maximum | Atlantica Yield Energy Solutions Canada, Inc | Measurement Input, Price Volatility |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  |  | 0.3319 |  |  |  | 0.3319 |  |  |  |  |
Maximum | Energy contracts |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Forward price | $ / MWh |  |  | 144.02 |  |  |  |  |  |  |  |  |
Derivative auction price (in USD per share) | $ / shares |  |  | $ 52.02 |  |  |  |  |  |  |  |  |
Maximum | Transmission congestion rights |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Receive average prices (per MW-hr) | $ / MWh |  |  | 24.88 |  |  |  |  |  |  |  |  |
Weighted average useful lives | Atlantica Yield Energy Solutions Canada Inc. (b) | Measurement Input, Discount Rate |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  |  | 0.0827 |  |  |  | 0.0827 |  |  |  |  |
Weighted average useful lives | Energy contracts |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Forward price | $ / MWh |  |  | 38.44 |  |  |  |  |  |  |  |  |
Derivative auction price (in USD per share) | $ / MWh |  |  | $ 5.69 |  |  |  |  |  |  |  |  |
Weighted average useful lives | Transmission congestion rights |  |  |  |  |  |  |  |  |  |  |  |
Fair Value of Financial Instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Receive average prices (per MW-hr) | $ / MWh |  |  | 5.16 |  |  |  |  |  |  |  |  |

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