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Investments (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019
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Schedule of Investments [Line Items] |  |
Equity method investment, ownership percentage | 49.00% |
Other variable interest entities |  |
Schedule of Investments [Line Items] |  |
Carrying value of unconsolidated investment | $ 7.5 | $ 7.6
Windfield Holdings |  |
Schedule of Investments [Line Items] |  |
Equity method investment, ownership percentage | 49.00% |
Carrying value of unconsolidated investment | $ 364.8 | $ 397.2

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