Restructuring and Relocation Activities - Restructuring Activities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Continuing Operations
Restructuring charges	$ 6.2	$ 1.3	$ 9.2	$ 1.1
Total charges	7.7	7.6	24.2	20.5
Capital expenditures	3.4	34.6	17.3	91.6
Continuing Operations
Continuing Operations
Other associated costs	2.9	5.2	12.7	13.2
Restructuring charges	6.2	1.3	9.2	1.1
Total charges	9.1	6.5	21.9	14.3
Discontinued Operations
Continuing Operations
Total charges	$ (1.4)	$ 1.1	$ 2.3	$ 6.2