Property, Plant and Equipment - Components of property, plant and equipment (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment
Total cost	$ 893.5	$ 822.6
Less accumulated depreciation	(527.4)	(487.3)
Property, plant and equipment — net	366.1	335.3
Land
Property, Plant and Equipment
Total cost	14.9	17.9
Building and Improvements
Property, Plant and Equipment
Total cost	201.5	194.7
Machinery, Equipment and Tooling
Property, Plant and Equipment
Total cost	318.4	300.6
Furniture and Fixtures
Property, Plant and Equipment
Total cost	13.8	13.8
Computer Hardware and Software
Property, Plant and Equipment
Total cost	135.8	129.4
Rental Cranes
Property, Plant and Equipment
Total cost	201.9	157.8
Property, plant and equipment — net	153.3	119.9
Construction in Progress
Property, Plant and Equipment
Total cost	$ 7.2	$ 8.4