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Other net losses - Additional Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Other Income and Expenses [Abstract]
Kentucky termination costs	$ 38,795
Acquisition-related settlement payment	12,814
Legal fees	$ 831

X

- Definition

Business Acquisition Related Settlement Payment, Gross

+ References

No definition available.

+ Details

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Namespace Prefix:	aqunf_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Capitalized Software, Write-off

+ References

No definition available.

+ Details

Name:	aqunf_CapitalizedSoftwareWriteOff
Namespace Prefix:	aqunf_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration