Income Taxes - U.S. and Foreign Components (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income (loss) from continuing operations before income taxes:
U.S.	$ 30.1	$ (1.7)	$ 53.6
Foreign	36.4	42.8	38.1
Total	66.5	41.1	91.7
Current:
Federal	0.3	(3.0)	4.7
State	(0.2)	0.1	0.5
Foreign	7.6	8.7	6.4
Total current income tax provision	7.7	5.8	11.6
Deferred:
Federal	3.0	(0.6)	(1.8)
State	0.8	(0.2)	(0.1)
Foreign	(0.4)	(1.1)	1.7
Total deferred income tax provision	3.4	(1.9)	(0.2)
Total provision for income taxes	$ 11.1	$ 3.9	$ 11.4