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Financial instruments (Tables)
 12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Schedule of Fair Value of Financial Instruments Fair value of financial instruments
December 31, 2023Carrying
amount		Fair
value		Level 1Level 2Level 3
Long-term investments carried at fair value$1,115,729 $1,115,729 $1,054,665 $— $61,064 
Development loans and other receivables158,110 155,735 — 155,735 — 
Derivative instruments:
Interest rate swap designated as a hedge72,936 72,936 — 72,936 — 
Interest rate cap not designated as a hedge1,854 1,854 — 1,854 — 
Congestion revenue rights not designated as a cash flow hedge8,458 8,458 — — 8,458 
Total derivative instruments83,248 83,248 — 74,790 8,458 
Total financial assets$1,357,087 $1,354,712 $1,054,665 $230,525 $69,522 
Long-term debt$8,516,030 $7,423,318 $2,532,608 $4,890,710 $— 
Notes payable to related party25,808 15,320 — 15,320 — 
Convertible debentures230 276 276 — — 
Derivative instruments:
Energy contracts designated as a cash flow hedge68,070 68,070 — — 68,070 
Energy contracts not designated as a cash flow hedge5,593 5,593 — — 5,593 
Cross-currency swap designated as a net investment hedge10,533 10,533 — 10,533 — 
Currency forward contract designated as hedge6,779 6,779 — 6,779 — 
Interest rate swaps designated as a hedge11,790 11,790 — 11,790 — 
Cross currency swap designated as a cash flow hedge5,547 5,547 — 5,547 — 
Commodity contracts for regulated operations2,564 2,564 — 2,564 — 
Total derivative instruments110,876 110,876 — 37,213 73,663 
Total financial liabilities$8,652,944 $7,549,790 $2,532,884 $4,943,243 $73,663 
24.Financial instruments (continued)
(a)Fair value of financial instruments (continued)
December 31, 2022Carrying
amount		Fair
value		Level 1Level 2Level 3
Long-term investment carried at fair value$1,344,207 $1,344,221 $1,270,138 $— $74,083 
Development loans and other receivables53,680 50,300 — 50,300 — 
Derivative instruments:
Energy contracts not designated as a cash flow hedge393 393 — — 393 
Interest rate swap designated as a hedge69,188 69,188 — 69,188 — 
Currency forward contract not designated as a hedge2,659 2,659 — 2,659 — 
Congestion revenue
rights not designated as
a cash flow hedge
10,110 10,110 — — 10,110 
Cross-currency swap designated as a net investment hedge1,267 1,267 — 1,267 — 
Commodity contracts for regulated operations283 283 — 283 — 
Total derivative instruments83,900 83,900 — 73,397 10,503 
Total financial assets$1,481,787 $1,478,421 $1,270,138 $123,697 $84,586 
Long-term debt$7,512,017 $6,699,031 $2,623,628 $4,075,403 $— 
Notes payable to related party25,808 15,180 — 15,180 — 
Convertible debentures245 276 276 — — 
Preferred shares, Series C12,072 11,675 — 11,675 — 
Derivative instruments:
Energy contracts designated as a cash flow hedge120,284 120,284 — — 120,284 
Energy contracts not designated as a cash flow hedge8,617 8,617 — — 8,617 
Cross-currency swap designated as a net investment hedge24,371 24,371 — 24,371 — 
Cross-currency swap designated as a cash flow hedge15,435 15,435 — 15,435 — 
Commodity contracts for regulated operations1,614 1,614 — 1,614 — 
Total derivative instruments170,321 170,321 — 41,420 128,901 
Total financial liabilities$7,720,463 $6,896,483 $2,623,904 $4,143,678 $128,901 
Schedule of Long-Term Energy Derivative Contracts
The Company reduces the price risk on the expected future sale of power generation by entering into the following long-term energy derivative contracts. 
Notional quantity
(MW-hrs)		ExpiryReceive average
prices (per MW-hr)		Pay floating price
(per MW-hr)
353,597  December 2028$29.19PJM Western HUB
1,492,926  December 2027$21.34NI HUB
1,332,645  December 2027 $36.46 ERCOT North HUB
3,534,802 September 2030 $24.54 Illinois Hub
Schedule of Derivative Instruments Designated as Amortized into Hedged Activity Disclosure Amounts for interest rate contracts are reclassified to earnings as interest expense over the term of the related debt.
Derivative
Notional quantity
Expiry
Hedged item
Forward-starting interest rate swap
$350,000 
July 2029
$350,000 subordinated unsecured notes
Cross-currency interest rate swap
C$400,000 
January 2032
C$400,000 subordinated unsecured notes
Forward-starting interest rate swap
$750,000 
April 2032
$750,000 subordinated unsecured notes
Forward-starting interest rate swap$575,000 June 2026
First $575,000 of the expected $1,150,000 senior unsecured notes issuance
Schedule of Derivative Financial Instruments Designated as Cash Flow Hedge, Effect on Consolidated Statement of Operations
The following table summarizes OCI attributable to derivative financial instruments designated as a cash flow hedge: 
20232022
Effective portion of cash flow hedge$57,351 $(128,838)
Amortization of cash flow hedge(6,173)(12,180)
Amounts reclassified from AOCI8,309 46,723 
OCI attributable to shareholders of AQN$59,487 $(94,295)
Schedule of Effects on Statement of Operations of Derivative Financial Instruments Not Designated as Hedges
The effects on the consolidated statements of operations of derivative financial instruments not designated as hedges consist of the following:
20232022
Unrealized gain (loss) on derivative financial instruments:
Energy derivative contracts$(372)$(945)
Commodity contracts411 185 
Total unrealized gain (loss) on derivative financial instruments$39 $(760)
Realized gain (loss) on derivative financial instruments:
Energy derivative contracts$(4,896)$6,939 
Interest rate swaps— (7,185)
Total realized loss on derivative financial instruments$(4,896)$(246)
Loss on derivative financial instruments not accounted for as hedges(4,857)(1,006)
Amortization of AOCI gains frozen as a result of hedge dedesignation3,989 3,465 
$(868)$2,459 
Consolidated statements of operations classification:
Gain on derivative financial instruments $4,564 $4,408 
Renewable energy sales(5,432)5,236 
Reduction to gain on sale of renewable assets— (7,185)
$(868)$2,459 
Schedule of Outstanding Obligations
The roll forwards of the Company's outstanding obligations confirmed as valid under its supplier finance programs for years ended December 31, 2023 and 2022, are as follows:
20232022
Confirmed obligations outstanding at the beginning of the year
$16,785 $49,910 
Invoices confirmed during the year90,780 16,785 
Confirmed invoices paid during the year(45,392)(49,910)
Confirmed obligations outstanding at the end of the year$62,173 $16,785 
Schedule of Maximum Credit Risk Exposure for Financial Instruments
As of December 31, 2023, the Company’s maximum exposure to credit risk for these financial instruments is as follows: 
 2023
Cash and cash equivalents and restricted cash$76,145 
Accounts receivable554,438 
Allowance for doubtful accounts(30,244)
Notes receivable158,836 
$759,175 
Schedule of Liabilities Maturity Profile
The Company’s liabilities mature as follows: 
Due less
than 1 year		Due 2 to 3
years		Due 4 to 5
years		Due after
5 years		Total
Long-term debt obligations$621,856 $1,333,772 $2,099,968 $4,481,961 $8,537,557 
Interest on long-term debt391,493 602,761 419,950 3,496,032 4,910,236 
Purchase obligations767,287 — — — 767,287 
Environmental obligation3,136 22,577 1,820 18,654 46,187 
Advances in aid of construction3,640 — — 84,495 88,135 
Derivative financial instruments:
Cross-currency swap2,419 4,243 144 9,623 16,429 
Interest rate forwards11,790 — — — 11,790 
Energy derivative and commodity contracts14,276 29,273 20,550 12,127 76,226 
Contract adjustment payments on Green Equity Units39,590 — — — 39,590 
Other obligations27,796 2,901 2,304 247,480 280,481 
Total obligations$1,883,283 $1,995,527 $2,544,736 $8,350,372 $14,773,918