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Financial instruments - Additional Information (Detail) | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 28, 2022 CAD ($) | Jun. 30, 2023 USD ($) dth MWh derivative_contract $ / MWh | Jun. 30, 2023 CAD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2023 USD ($) dth MWh derivative_contract $ / MWh | Jun. 30, 2023 CAD ($) | Jun. 30, 2022 USD ($) | Jun. 30, 2023 CAD ($) dth MWh derivative_contract | Dec. 31, 2022 USD ($) | Dec. 17, 2022 CAD ($) MWh $ / MWh | Jan. 31, 2022 CAD ($) | May 23, 2019 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | dth |  | 2,755,733 |  |  | 2,755,733 |  |  | 2,755,733 |  |  |  |
Number of interest rate swap contracts | derivative_contract |  | 2 |  |  | 2 |  |  | 2 |  |  |  |
Foreign currency gain (loss) |  | $ 130,000 |  | $ (48,440,000) | $ 15,555,000 |  | $ (40,595,000) |  |  |  |  |
Supplier Financing Programs |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable |  | 63,328,000 |  |  | 63,328,000 |  |  |  | $ 16,785,000 |  |  |
Non-regulated Energy Sales |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Unrealized gains (loss) in AOCI to be reclassified |  |  |  |  | 19,722,000 |  |  |  |  |  |  |
U.S. dollar Subordinated unsecured notes | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Par value |  |  |  |  |  |  |  | $ 300,000,000 |  |  |  | $ 350,000,000
Debt repaid upon maturity | $ 200,000,000 |  |  |  |  |  |  |  |  |  |  |
Canadian dollar Senior unsecured notes | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Par value |  |  |  |  |  |  |  | 1,200,000,000 |  |  |  |
Designated as a hedge | Canadian dollar Senior unsecured notes |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amortization of AOCI gains frozen as a result of hedge dedesignation |  | 2,924,000 |  | (2,149,000) | 2,801,000 |  | (2,544,000) |  |  |  |  |
Canadian Investments and Subsidiaries |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gain (loss) |  | 9,629,000 |  | 395,000 | 9,638,000 |  | 220,000 |  |  |  |  |
Currency Swap |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cross-currency interest rate swap |  |  |  |  |  |  |  |  |  |  | $ 400,000,000 |
Currency Swap | U.S. dollar Subordinated unsecured notes | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Par value |  |  |  |  |  |  |  | $ 400,000,000 |  |  |  |
Currency Swap | Canadian dollar Senior unsecured notes | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gain (loss) |  | (3,967,000) |  | 8,132,000 | (4,348,000) |  | 6,080,000 |  |  |  |  |
Interest rate swaps designated as a hedge |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | MWh |  |  |  |  |  |  |  |  |  | 388,170 |  |
Receive average prices (per MW-hr) | $ / MWh |  |  |  |  |  |  |  |  |  | 25.15 |  |
Derivative notional amount |  |  |  |  |  |  |  |  |  | $ 390,000,000 |  |
Interest rate swaps designated as a hedge | U.S. dollar Subordinated unsecured notes |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Derivative notional amount |  | 350,000,000 |  |  | 350,000,000 |  |  |  |  |  |  |
Interest rate swaps designated as a hedge | Canadian dollar Senior unsecured notes | Unsecured Debt |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gain (loss) |  |  | $ (4,975,000) | 8,439,000 |  | $ (4,987,000) | 14,252,000 |  |  |  |  |
Foreign exchange contract |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency gain (loss) |  | $ (6,942,000) |  | $ 14,929,000 | $ (7,009,000) |  | $ 10,697,000 |  |  |  |  |
Transmission congestion rights |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Nonmonetary notional amount | MWh |  | 919,014 |  |  | 919,014 |  |  | 919,014 |  |  |  |
Minimum | Atlantica Yield Energy Solutions Canada Inc. | Measurement Input, Discount Rate |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  | 0.0781 |  |  | 0.0781 |  |  | 0.0781 |  |  |  |
Minimum | Atlantica Yield Energy Solutions Canada, Inc | Measurement Input, Price Volatility |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  | 0.2699 |  |  | 0.2699 |  |  | 0.2699 |  |  |  |
Minimum | Energy contracts |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Forward price | $ / MWh |  | 24.27 |  |  | 24.27 |  |  |  |  |  |  |
Derivative auction price | $ / MWh |  | $ 0 |  |  | $ 0 |  |  |  |  |  |  |
Minimum | Transmission congestion rights |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Receive average prices (per MW-hr) | $ / MWh |  | 0.64 |  |  | 0.64 |  |  |  |  |  |  |
Maximum | Atlantica Yield Energy Solutions Canada Inc. | Measurement Input, Discount Rate |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  | 0.0831 |  |  | 0.0831 |  |  | 0.0831 |  |  |  |
Maximum | Atlantica Yield Energy Solutions Canada, Inc | Measurement Input, Price Volatility |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  | 0.3489 |  |  | 0.3489 |  |  | 0.3489 |  |  |  |
Maximum | Energy contracts |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Forward price | $ / MWh |  | 73.20 |  |  | 73.20 |  |  |  |  |  |  |
Derivative auction price | $ / MWh |  | $ 23.98 |  |  | $ 23.98 |  |  |  |  |  |  |
Maximum | Transmission congestion rights |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Receive average prices (per MW-hr) | $ / MWh |  | 19.06 |  |  | 19.06 |  |  |  |  |  |  |
Weighted Average | Atlantica Yield Energy Solutions Canada Inc. | Measurement Input, Discount Rate |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Alternative investment, measurement input (percent) |  | 0.0812 |  |  | 0.0812 |  |  | 0.0812 |  |  |  |
Weighted Average | Energy contracts |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Forward price | $ / MWh |  | 35.79 |  |  | 35.79 |  |  |  |  |  |  |
Derivative auction price | $ / MWh |  | $ 5.04 |  |  | $ 5.04 |  |  |  |  |  |  |
Weighted Average | Transmission congestion rights |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Receive average prices (per MW-hr) | $ / MWh |  | 5.97 |  |  | 5.97 |  |  |  |  |  |  |

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