Nature of the business, Financing arrangements (Details) |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Nov. 27, 2018 |
Mar. 09, 2018 |
Nov. 30, 2017 |
Dec. 31, 2018 |
|
| Abengoa [Member] | ||||
| Financing arrangements [Abstract] | ||||
| Minimum ownership requirement percentage | 16.47% | 16.00% | ||
| Stake in parent to be sold to Algonquin | 25.00% | |||
| Algonquin [Member] | ||||
| Financing arrangements [Abstract] | ||||
| Ownership interest | 25.00% | 25.00% | 41.47% | |
| Stake in parent to be sold to Algonquin | 16.47% | 25.00% |