Restructuring and Other Related Charges - Accrual Balance and Utilization by Type of Restructuring Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve [Roll Forward]
Beginning Balance	$ 5.4	$ 10.3
Restructuring charges	56.6	7.0	$ 18.6
Paid/ Settled	(24.7)	(11.9)
Ending Balance	37.3	5.4	10.3
Employee severance related
Restructuring Reserve [Roll Forward]
Beginning Balance	4.9	9.5
Restructuring charges	53.0	5.0	13.8
Paid/ Settled	(21.0)	(9.6)
Ending Balance	36.9	4.9	9.5
Facility exit and other related
Restructuring Reserve [Roll Forward]
Beginning Balance	0.5	0.8
Restructuring charges	3.6	2.0
Paid/ Settled	(3.7)	(2.3)
Ending Balance	$ 0.4	$ 0.5	$ 0.8