Restructuring Costs and Other Restructuring Costs and Other - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 3.3		$ 4.5	$ 13.5	$ 13.9
Multiemployer plans, withdrawal obligation, settlement term		19 years
Restructuring Actions 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 8.4
Withdrawal from Multiemployer Defined Benefit Plan | Restructuring Actions 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges		$ 12.5