Income Taxes (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income tax provision	[1]	$ 5.4	$ 17.7	$ 15.7	$ 33.6
Effective income tax rate (as a percent)		11.10%	29.30%	11.20%	21.70%
Income tax benefit due to change in estimate related to uncertain tax position				$ 1.6
Decrease in foreign income taxes due to special income tax concession		$ 0.6	$ 1.1	$ 2.4	$ 3.9
Impact of income tax concession on basic earnings per common share (in dollars per share)		$ 0.01	$ 0.02	$ 0.03	$ 0.05
Impact of income tax concession on diluted earnings per common share (in dollars per share)		$ 0.01	$ 0.02	$ 0.03	$ 0.05
Without income tax benefit adjustment
Effective income tax rate (as a percent)				12.40%

[1] Amounts may not add due to rounding