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Income Taxes - Reconciliation of Income Tax Rate (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Amount [Abstract]      
Tax provision at U.S. statutory rate $ 32.6 $ 36.9 $ 37.9
Foreign income tax rate differential (9.0) (16.2) (15.4)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount (2.5) 1.1 (0.1)
Domestic production deduction (0.9) (1.5) (1.0)
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Amount (7.0) 0.0 0.0
Adjustments to valuation allowances 3.5 1.4 0.4
Other, net (1.3) (0.1) (1.3)
Provision for income taxes $ 15.4 $ 21.6 $ 20.5
Percent [Abstract]      
Tax provision at U.S. statutory rate 35.00% 35.00% 35.00%
Foreign income tax rate differential (9.60%) (15.40%) (14.20%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent (2.70%) 1.10% (0.10%)
Domestic production deduction (1.00%) (1.40%) (0.90%)
Effective Income Tax Rate Reconciliation, Tax Settlement, Foreign, Percent (7.50%) 0.00% 0.00%
Adjustments to valuation allowances 3.70% 1.30% 0.40%
Other, net (1.40%) (0.10%) (1.30%)
Provision for income taxes 16.50% 20.50% 18.90%