Restructuring - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 1.0	$ 3.7	$ 11.0	$ 21.3
Relocation from Manitowoc, WI to Milwaukee, WI
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 1.0
Closure of Manitowoc, WI Facility
Restructuring Cost and Reserve [Line Items]
Restructuring expense		$ 3.7		$ 21.3
Transfer of Crawler Crane Production to Shady Grove, PA
Restructuring Cost and Reserve [Line Items]
Restructuring expense			$ 11.0