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Acquisitions - Bishop Hill III (Details) - Bishop Hill III Wind Energy Center $ in Millions | 1 Months Ended |
--- | --- | ---
Aug. 31, 2018 USD ($) MW | Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |  |
Capacity of generation unit | MW | 132.1 |
Additional ownership interest acquired |  | 10.00%
Duration of offtake agreement for the sale of energy produced | 22 years |
Bonus depreciation percentage | 100.00% |
Allocation of the purchase price |  |
Other long-term assets | $ 4.5 |
WECI |  |
Business Acquisition [Line Items] |  |
Ownership interest in wind generating facility acquired | 80.00% |
Acquisition purchase price | $ 144.7 | $ 18.2
Allocation of the purchase price |  |
Current assets | 1.4 |
Net property, plant, and equipment | 190.2 |
Other long-term assets | 4.5 |
Current liabilities | (1.6) |
Long-term liabilities | (8.3) |
Noncontrolling interest | (18.8) |
Total purchase price | $ 167.4 |

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