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Acquisition and Dispositions (Details) $ in Millions | May 14, 2020 USD ($) | Mar. 03, 2020 | May 01, 2019 USD ($) MW
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RPV Holdco 1 LLC |  |  |
Business Acquisition [Line Items] |  |  |
Proceeds from sale of interests | $ 75 |  |
Gain on sale of investment | $ 49 |  |
Energy Center Dover |  |  |
Business Acquisition [Line Items] |  |  |
Sale of assets percentage ownership interest sold |  | 100.00% |
Duquesne University District Energy System |  |  |
Business Acquisition [Line Items] |  |  |
Power generation capacity, megawatts | MW |  |  | 87
Power purchase agreement period |  |  | 40 years
Business combination, consideration transferred |  |  | $ 107

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