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Variable Interest Entities (Schedule of Net Income Attributable to Noncontrolling Interest) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Income Attributable to Noncontrolling Interest [Line Items] |  |  |  |
Net loss attributable to noncontrolling interest | $ (2.3) | $ (1.0) | $ (9.0) | $ (3.4)
Rosewater |  |  |  |
Income Attributable to Noncontrolling Interest [Line Items] |  |  |  |
Net loss attributable to noncontrolling interest | (1.1) | $ (1.0) | (4.0) | (3.4)
Indiana Crossroads Wind |  |  |  |
Income Attributable to Noncontrolling Interest [Line Items] |  |  |  |
Net loss attributable to noncontrolling interest | $ (1.2) |  | $ (5.0) | $ 0.0

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