XML 116 R96.htm IDEA: XBRL DOCUMENT
v3.20.4

Shareholder's capital - Share-Based Compensation Expense (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |
Share-based compensation expense | $ 24,637 | $ 11,042
Share options |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |
Share-based compensation expense | 1,743 | 1,288
Director deferred share units |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |
Share-based compensation expense | 870 | 798
Employee share purchase |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |
Share-based compensation expense | 511 | 322
Performance and restricted share units |  |
Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] |  |
Share-based compensation expense | $ 21,513 | $ 8,634

X
- Definition Schedule Of Employee Service Share Based Compensation Expense Allocation [Line Items] + References No definition available. + Details
Name: | aqunf_ScheduleOfEmployeeServiceShareBasedCompensationExpenseAllocationLineItems
Namespace Prefix: | aqunf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_AllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_EmployeeStockOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=aqunf_DirectorsDeferredStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=aqunf_EmployeeSharePurchasePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_PerformanceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |