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Income Taxes - Reconciliation of Income Tax Rate (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Amount [Abstract]
Tax provision at U.S. statutory rate	$ 36.9	$ 37.9	$ 44.7
Foreign income tax rate differential	(16.2)	(15.4)	9.0
Domestic production deduction	(1.5)	(1.0)	0.0
Adjustments to valuation allowances	1.4	0.4	1.2
Other, net	1.0	(1.4)	(1.9)
Provision for income taxes	$ 21.6	$ 20.5	$ 53.0
Percent [Abstract]
Tax provision at U.S. statutory rate	35.00%	35.00%	35.00%
Foreign income tax rate differential	(15.40%)	(14.20%)	7.00%
Domestic production deduction	(1.40%)	(0.90%)	(0.00%)
Adjustments to valuation allowances	1.30%	0.40%	0.90%
Other, net	1.00%	(1.40%)	(1.40%)
Provision for income taxes	20.50%	18.90%	41.50%

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