Property, Plant and Equipment - Components of property, plant and equipment (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment
Total cost	$ 928.6	$ 893.5
Less accumulated depreciation	(562.6)	(527.4)
Property, plant and equipment — net	366.0	366.1
Land
Property, Plant and Equipment
Total cost	15.0	14.9
Building and Improvements
Property, Plant and Equipment
Total cost	204.0	201.5
Machinery, Equipment and Tooling
Property, Plant and Equipment
Total cost	340.9	318.4
Furniture and Fixtures
Property, Plant and Equipment
Total cost	13.9	13.8
Computer Hardware and Software
Property, Plant and Equipment
Total cost	138.2	135.8
Rental cranes
Property, Plant and Equipment
Total cost	206.9	201.9
Construction in Progress
Property, Plant and Equipment
Total cost	$ 9.7	$ 7.2