Restructuring Charges - Restructuring Reserve and Utilization (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Feb. 07, 2019	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Restructuring Reserve [Rollforward]
Balance at beginning of period	$ 7.6	$ 9.7	$ 10.3		$ 7.6
Impact of purchase accounting					3.2
Charge taken during the period	0.1	18.9	15.8		48.8
Payments made during period	(2.1)	(20.6)	(16.5)	[1]	(39.8)	[1]
Payments made during 2020			16.4
Payments and other adjustments made during period					(41.7)
Reclassification related to leases pursuant to the adoption of Topic 842	(2.4)
Balance at end of period	3.2	8.0	9.7		10.3
Severance and termination
Restructuring Reserve [Rollforward]
Balance at beginning of period	4.7	2.6	5.8		4.7
Impact of purchase accounting					3.2
Charge taken during the period	0.1	18.9	9.9		36.6
Payments made during period	(1.6)	(16.8)
Payments made during 2020			13.1
Payments and other adjustments made during period					(34.0)
Reclassification related to leases pursuant to the adoption of Topic 842	0.0
Balance at end of period	3.2	4.7	2.6		5.8
Contract termination and other exit costs
Restructuring Reserve [Rollforward]
Balance at beginning of period	2.9	7.1	4.5		2.9
Impact of purchase accounting					0.0
Charge taken during the period	0.0	0.0	5.9		12.2
Payments made during period	(0.5)	(3.8)
Payments made during 2020			3.3
Payments and other adjustments made during period					(7.7)
Reclassification related to leases pursuant to the adoption of Topic 842	(2.4)
Balance at end of period	$ 0.0	$ 3.3	$ 7.1		$ 4.5

[1] See Note 1 Basis of Presentation and Description of Business for further detail regarding the elimination of the International lag reporting