Income Taxes - U.S. and Foreign Components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income from continuing operations before income taxes:
U.S.	$ 68.3	$ 62.2	$ 46.5
Foreign	34.7	27.7	29.0
Income from continuing operations before income taxes	103.0	89.9	75.5
Current:
Federal	7.1	12.7	0.5
State	(0.5)	1.3	0.0
Foreign	5.9	5.1	3.4
Total current tax provision	12.5	19.1	3.9
Deferred:
Federal	14.8	7.7	6.9
State	1.8	2.3	(5.9)
Foreign	0.5	0.3	2.6
Total deferred tax provision	17.1	10.3	3.6
Total provision for income taxes	$ 29.6	$ 29.4	$ 7.5