Property, Plant and Equipment - Components of property, plant and equipment (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment
Total cost	$ 821.1	$ 756.1
Less accumulated depreciation	(462.3)	(461.8)
Property, plant and equipment — net	358.8	294.3
Land
Property, Plant and Equipment
Total cost	19.4	20.3
Building and Improvements
Property, Plant and Equipment
Total cost	203.4	203.7
Machinery, Equipment and Tooling
Property, Plant and Equipment
Total cost	298.9	292.6
Furniture and Fixtures
Property, Plant and Equipment
Total cost	14.5	21.0
Computer Hardware and Software
Property, Plant and Equipment
Total cost	125.6	119.3
Rental Cranes
Property, Plant and Equipment
Total cost	144.2	90.2
Property, plant and equipment — net	119.5	59.9
Construction in Progress
Property, Plant and Equipment
Total cost	$ 15.1	$ 9.0