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Acquisition and Dispositions (Details) $ in Millions	May 14, 2020 USD ($)	Mar. 03, 2020	May 01, 2019 USD ($) MW
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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