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Income Taxes - Deferred Income Tax Assets and Liabilities and Valuation Allowances Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Tax Credit Carryforward [Line Items]      
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards $ 281.1 $ 320.2  
Deferred Tax Assets, Operating Loss and Tax Credit Carryforwards, Not Subject to Expiration 95.9    
Valuation allowance, deferred tax asset, increase (decrease), amount 0.8 14.5 $ 25.4
Deferred Tax Assets, Valuation Allowance 201.7 208.0  
United States      
Tax Credit Carryforward [Line Items]      
Valuation allowance, deferred tax asset, increase (decrease), amount 1.9 $ 5.3  
Deferred Tax Assets, Valuation Allowance $ 7.0    
Foreign Tax Authority [Member]      
Tax Credit Carryforward [Line Items]      
Valuation allowance, deferred tax asset, increase (decrease), amount     $ 12.8