Segment Information - Reconciliation of Adjusted EBITDA to Net Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting [Abstract]
Net income attributable to common stockholders	$ 81.1	$ 1.2	$ 163.4	$ 9.8
Add (subtract):
(Income) loss from discontinued operations, net of tax	(2.0)	1.1	(2.0)	0.9
Income tax (benefit) expense	(31.9)	5.8	(0.8)	9.9
Interest expense, net	12.9	16.9	25.8	33.6
Depreciation expense	9.7	10.5	19.1	21.0
Amortization expense	30.4	28.9	60.1	58.3
EBITDA	100.2	64.4	265.6	133.5
Adjustments to reconcile to Adjusted EBITDA:
Amortization of inventory step-up	2.2	0.0	2.2	1.4
Restructuring expense	1.6	3.3	3.9	4.3
Acquisition and integration expense	5.9	1.3	3.2	7.9
Foreign exchange loss (gain) on internal debt	4.6	11.8	(23.4)	40.9
Adjustment of stock compensation previously not probable (Note 8)	13.6	0.0	13.6	0.0
Other, net	5.0	4.0	5.9	6.9
Adjusted EBITDA	$ 133.1	$ 84.8	$ 271.0	$ 194.9