Income Taxes - Income Taxes (Provision for) Benefit (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income from continuing operations:
United States	$ 17.2	$ 39.6	$ 52.9
Foreign	52.7	39.0	35.9
Income from continuing operations before income taxes	69.9	78.6	88.8
Current:
United States	(5.4)	(0.7)	6.8
Foreign	(6.9)	(3.8)	(5.5)
Total current	(12.3)	(4.5)	1.3
Deferred and other:
United States	0.8	(0.3)	(12.8)
Foreign	0.6	0.0	(1.0)
Total deferred and other	1.4	(0.3)	(13.8)
Total provision	$ (10.9)	$ (4.8)	$ (12.5)