Property, Plant and Equipment - Components of property, plant and equipment (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment
Total cost	$ 1,230.9	$ 1,294.1
Less accumulated depreciation	(703.9)	(703.1)
Property, plant and equipment-net	527.0	591.0
Land
Property, Plant and Equipment
Total cost	31.0	31.2
Building and improvements
Property, Plant and Equipment
Total cost	313.0	344.2
Machinery, equipment and tooling
Property, Plant and Equipment
Total cost	490.2	509.1
Furniture and fixtures
Property, Plant and Equipment
Total cost	22.8	24.5
Computer hardware and software
Property, Plant and Equipment
Total cost	183.5	169.7
Rental cranes
Property, Plant and Equipment
Total cost	99.5	111.2
Property, plant and equipment-net	69.4	83.4
Construction in progress
Property, Plant and Equipment
Total cost	$ 90.9	$ 104.2