Restructuring and Acquisition-Related Costs - Restructuring Reserve Table (Details) - USD ($) $ in Millions	12 Months Ended			39 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Restructuring Reserve [Roll Forward]
Restructuring reserve	$ 4.0	$ 0.3	$ 9.8
Restructuring charges	39.8	44.2	17.4
Cash utilization	(31.6)	(10.5)	(25.4)
Non-cash utilization	0.0	(30.0)	(1.5)
Restructuring reserve	12.2	4.0	0.3	$ 12.2
2016 Restructuring Plan - Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges				2.8
2016 Restructuring Plan - Other Restructuring [Member]
Restructuring Reserve [Roll Forward]
Restructuring charges				29.6
Employee Severance [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve	2.4	0.3	0.6
Restructuring charges	19.4	2.5	2.0
Cash utilization	(17.0)	(0.4)	(2.3)
Non-cash utilization	0.0	0.0	0.0
Restructuring reserve	4.8	2.4	0.3	4.8
Facility Closing [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve	1.6	0.0	9.2
Restructuring charges	20.4	11.7	13.9
Cash utilization	(14.6)	(10.1)	(23.1)
Non-cash utilization	0.0	0.0	0.0
Restructuring reserve	7.4	1.6	0.0	7.4
Asset Impairment [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserve	0.0	0.0	0.0
Restructuring charges	0.0	30.0	1.5
Cash utilization	0.0	0.0	0.0
Non-cash utilization	0.0	(30.0)	(1.5)
Restructuring reserve	$ 0.0	$ 0.0	$ 0.0	$ 0.0