Restructuring Activities - By Condensed Consolidated Statements of Operations Location (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Other restructuring associated costs	$ 12.8	$ 0.7	$ 50.8	$ 2.5
Restructuring charges	6.9	6.6	43.6	22.3
Total charges	19.7	7.5	94.4	25.8
Capital expenditures	0.2	0.1	2.5	0.6
Continuing Operations
Restructuring Cost and Reserve [Line Items]
Other restructuring associated costs	12.8	0.9	50.8	3.5
Restructuring charges	$ 6.9	$ 6.6	$ 43.6	$ 22.3