Restructuring Activities - Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Continuing Operations:
Other related costs	$ 3.8	$ 21.3	$ 7.8	$ 38.0
Restructuring charges	10.1	29.3	10.7	36.7
Total charges	13.9	50.6	18.5	74.7
Capital expenditures	0.0	1.8	0.2	2.3
Continuing Operations
Continuing Operations:
Other related costs	3.8	21.3	7.8	38.0
Restructuring charges	$ 10.1	$ 29.3	$ 10.7	$ 36.7