Acquisitions - Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue
As reported	$ 419.2	$ 489.4	$ 1,288.4	$ 1,400.2
Income from continuing operations
As reported	$ 17.2	$ 33.5	$ 78.7	$ 87.2
As reported
Basic earnings per share from continuing operations (in dollars per share)	$ 0.54	$ 1.05	$ 2.46	$ 2.74
Diluted earnings per share from continuing operations (in dollars per share)	$ 0.54	$ 1.04	$ 2.45	$ 2.72
Proseal
Revenue
Pro forma	$ 419.2	$ 489.4	$ 1,288.4	$ 1,438.6
Income from continuing operations
Pro forma	$ 17.2	$ 37.4	$ 78.7	$ 93.4
Pro forma
Basic (in dollars per share)	$ 0.54	$ 1.17	$ 2.46	$ 2.93
Fully diluted (in dollars per share)	$ 0.54	$ 1.17	$ 2.45	$ 2.91