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Income Taxes - Operating Loss and Tax Credit Carryforwards (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Operating Loss Carryforwards [Line Items]    
Charitable contribution carryover (CCCs) $ 1.2 $ 23.6
US State    
Operating Loss Carryforwards [Line Items]    
Net operating losses 114.9 157.0
Tax credit carryforwards 3.2 4.9
US Federal    
Operating Loss Carryforwards [Line Items]    
Tax credit carryforwards 12.2 12.2
Foreign    
Operating Loss Carryforwards [Line Items]    
Net operating losses $ 50.6 $ 54.1