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Income Taxes - Narrative (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
subsidiary
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Valuation Allowance [Line Items]        
Provisional tax benefit recorded related to the Tax Act $ 0.0 $ 0.6 $ 73.0  
U.S. federal statutory corporate tax rate 21.00% 21.00% 35.00%  
Provision for income taxes $ 53.3 $ 47.6 $ 5.6  
Effective tax rate 23.40% 23.20% 2.50%  
Number of foreign subsidiaries | subsidiary 2      
Deferred tax liabilities, net $ 21.9      
Unrecognized tax benefits 2.4 $ 1.6 $ 1.2 $ 0.0
Unrecognized tax benefits that would affect the effective tax rate if recognized 2.1 1.4 1.0  
Interest and penalties related to uncertain tax positions 0.3 $ 0.2 $ 0.2  
State        
Valuation Allowance [Line Items]        
NOL carryforwards 620.1      
Foreign        
Valuation Allowance [Line Items]        
NOL carryforwards $ 113.2