XML 116 R48.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Dividends (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Disclosure Cash Dividends [Abstract] |
Dividends | Dividends declared during the year were as follows:
| 2019 |  | 2018
| Dividend |  | Dividend per share |  | Dividend |  | Dividend per share
Common shares | $ | 277,835 |  |  | $ | 0.5512 |  |  | $ | 235,440 |  |  | $ | 0.5011 |
Series A preferred shares | C$ | 6,194 |  |  | C$ | 1.2905 |  |  | C$ | 5,400 |  |  | C$ | 1.1250 |
Series D preferred shares | C$ | 5,068 |  |  | C$ | 1.2671 |  |  | C$ | 5,000 |  |  | C$ | 1.2500 |

X
- Definition Disclosure - Cash Dividends - Additional Information [Abstract] + References No definition available. + Details
Name: | aqunf_DisclosureCashDividendsAbstract
Namespace Prefix: | aqunf_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information related to dividends declared, including paid and unpaid dividends. + References No definition available. + Details
Name: | us-gaap_DividendsDeclaredTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration