Acquisitions - Pro Forma Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue
As reported	$ 411.5	$ 493.3	$ 869.2	$ 910.8
Income from continuing operations
As reported	$ 32.5	$ 34.0	$ 61.5	$ 53.7
As reported
Basic earnings per share from continuing operations (in dollars per share)	$ 1.02	$ 1.07	$ 1.92	$ 1.69
Diluted earnings per share from continuing operations (in dollars per share)	$ 1.01	$ 1.06	$ 1.92	$ 1.68
Proseal
Revenue
Pro forma	$ 411.5	$ 509.5	$ 869.2	$ 949.2
Income from continuing operations
Pro forma	$ 32.5	$ 35.5	$ 61.5	$ 56.3
Pro forma
Basic (in dollars per share)	$ 1.02	$ 1.11	$ 1.92	$ 1.76
Fully diluted (in dollars per share)	$ 1.01	$ 1.11	$ 1.92	$ 1.76