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Variable Interest Entities (Schedule of Net Income Attributable to Noncontrolling Interest) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Income Attributable to Noncontrolling Interest [Line Items] |  |  |  |
Net loss attributable to noncontrolling interest | $ (11.2) | $ (3.4) | $ (6.7) | $ (2.4)
Rosewater |  |  |  |
Income Attributable to Noncontrolling Interest [Line Items] |  |  |  |
Net loss attributable to noncontrolling interest | (4.0) | $ (3.4) | (2.9) | (2.4)
Indiana Crossroads Wind |  |  |  |
Income Attributable to Noncontrolling Interest [Line Items] |  |  |  |
Net loss attributable to noncontrolling interest | $ (7.2) |  | $ (3.8) | $ 0.0

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