XML 137 R117.htm IDEA: XBRL DOCUMENT v3.20.4

Commitments and contingencies - Estimates of Future Commitments (Detail) $ in Thousands, $ in Thousands	Nov. 28, 2018 CAD ($)	Oct. 30, 2018 CAD ($)	Mar. 04, 2021 lawsuit	Dec. 31, 2020 USD ($)
Commitments Disclosure [Line Items]
Year 1				$ 852,091
Year 2				143,691
Year 3				131,702
Year 4				124,039
Year 5				116,973
Thereafter				755,800
Total				2,124,296
Power purchase
Commitments Disclosure [Line Items]
Year 1				45,083
Year 2				27,310
Year 3				26,178
Year 4				26,236
Year 5				26,472
Thereafter				167,380
Total				318,659
Gas supply and service agreements
Commitments Disclosure [Line Items]
Year 1				89,034
Year 2				62,781
Year 3				48,427
Year 4				42,174
Year 5				37,699
Thereafter				144,885
Total				425,000
Service agreements
Commitments Disclosure [Line Items]
Year 1				56,828
Year 2				46,817
Year 3				50,223
Year 4				48,671
Year 5				45,766
Thereafter				248,540
Total				496,845
Capital projects
Commitments Disclosure [Line Items]
Year 1				654,399
Year 2				0
Year 3				0
Year 4				0
Year 5				0
Thereafter				0
Total				654,399
Land easements
Commitments Disclosure [Line Items]
Year 1				6,747
Year 2				6,783
Year 3				6,874
Year 4				6,958
Year 5				7,036
Thereafter				194,995
Total				$ 229,393
Gaia Power Inc. vs APUC
Commitments Disclosure [Line Items]
Damages claimed by other party in lawsuit	$ 108,500	$ 345,000
Punitive damages claimed by other party in lawsuit	$ 10,000	$ 25,000
Mountain View Fire | Subsequent Event
Commitments Disclosure [Line Items]
Number of lawsuits filed | lawsuit			4

X

- Definition

Commitments Disclosure [Line Items]

+ References

No definition available.

+ Details

Name:	aqunf_CommitmentsDisclosureLineItems
Namespace Prefix:	aqunf_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Loss Contingency, Punitive Damages Sought, Value

+ References

No definition available.

+ Details

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

X

- Definition

Number of Lawsuits

+ References

No definition available.

+ Details

Name:	aqunf_NumberOfLawsuits
Namespace Prefix:	aqunf_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

+ References

No definition available.

+ Details

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of contractual obligation to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	us-gaap_ContractualObligationDueAfterFifthYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of contractual obligation to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	us-gaap_ContractualObligationDueInFifthYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of contractual obligation to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	us-gaap_ContractualObligationDueInFourthYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of contractual obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	us-gaap_ContractualObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of contractual obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	us-gaap_ContractualObligationDueInSecondYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of contractual obligation to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

+ References

No definition available.

+ Details

Name:	us-gaap_ContractualObligationDueInThirdYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

+ Details

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

X

- Details

Name:	aqunf_CommitmentsAxis=aqunf_PurchasedPowerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	aqunf_CommitmentsAxis=aqunf_ServicesAndSupplyAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	aqunf_CommitmentsAxis=us-gaap_ServiceAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	aqunf_CommitmentsAxis=aqunf_CapitalProjectsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	aqunf_CommitmentsAxis=aqunf_OperatingLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=aqunf_GaiaPowerInc.vsAPUCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_LitigationCaseAxis=aqunf_MountainViewFireMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: