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Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Operating Loss Carryforwards [Line Items]      
Income tax (expense) benefit $ (1.1) $ 9.7  
Operating loss carryforwards, US 96.0    
Reduced deferred tax asset carryforward 69.6    
Domestic Tax Authority      
Operating Loss Carryforwards [Line Items]      
Operating loss carryforwards     $ 170.3
Foreign Tax Authority      
Operating Loss Carryforwards [Line Items]      
Foreign operating loss carryforward     $ 112.6
Foreign Tax Authority | Energy      
Operating Loss Carryforwards [Line Items]      
Foreign operating loss carryforward $ 29.3