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Accumulated other comprehensive income (loss) - Schedule of Accumulated Other Comprehensive Income (loss) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning Balance $ 7,382,079 $ 5,662,190
OCI (123,129) (90,838)
Amounts reclassified from AOCI to the unaudited interim consolidated statements of operations 33,093 48,288
OCI, net of tax (90,036) (42,550)
OCI attributable to the non-controlling interests 1,650 (249)
Net current period OCI attributable to shareholders of AQN (88,386) (42,799)
Amounts reclassified from AOCI to non-controlling interest   (6,371)
Ending Balance 6,836,439 7,382,079
Total    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning Balance (71,677) (22,507)
OCI, net of tax (88,386) (42,799)
Ending Balance (160,063) (71,677)
Foreign currency cumulative translation    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning Balance (76,615) (39,725)
OCI (18,013) (25,982)
Amounts reclassified from AOCI to the unaudited interim consolidated statements of operations (5,489) (4,288)
OCI, net of tax (23,502) (30,270)
OCI attributable to the non-controlling interests 1,650 (249)
Net current period OCI attributable to shareholders of AQN (21,852) (30,519)
Amounts reclassified from AOCI to non-controlling interest   (6,371)
Ending Balance (98,467) (76,615)
Unrealized gain (loss) on cash flow hedges    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning Balance (3,514) 50,817
OCI (128,838) (97,103)
Amounts reclassified from AOCI to the unaudited interim consolidated statements of operations 34,543 42,772
OCI, net of tax (94,295) (54,331)
OCI attributable to the non-controlling interests 0 0
Net current period OCI attributable to shareholders of AQN (94,295) (54,331)
Amounts reclassified from AOCI to non-controlling interest   0
Ending Balance (97,809) (3,514)
Pension and post-employment actuarial changes    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]    
Beginning Balance 8,452 (33,599)
OCI 23,722 32,247
Amounts reclassified from AOCI to the unaudited interim consolidated statements of operations 4,039 9,804
OCI, net of tax 27,761 42,051
OCI attributable to the non-controlling interests 0 0
Net current period OCI attributable to shareholders of AQN 27,761 42,051
Amounts reclassified from AOCI to non-controlling interest   0
Ending Balance $ 36,213 $ 8,452