XML 106 R13.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Accounts receivable | 12 Months Ended
--- | ---
Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract] |
Accounts receivable | Accounts receivable Accounts receivable as of December 31, 2019 include unbilled revenue of $80,295 (2018 - $79,742) from the Company’s regulated utilities. Accounts receivable as of December 31, 2019 are presented net of allowance for doubtful accounts of $4,939 (2018 - $5,281).

X
- Definition Accounts Receivables. + References No definition available. + Details
Name: | aqunf_AccountsReceivablesTextBlock
Namespace Prefix: | aqunf_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountsNotesLoansAndFinancingReceivableGrossAllowanceAndNetAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration