PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property, plant and equipment.
Gross property, plant and equipment	$ 713.6	$ 667.3
Less: Accumulated depreciation	(368.0)	(356.3)
Net property, plant and equipment	345.6	311.0
Depreciation	53.3	59.9	$ 65.5
Property
Property, plant and equipment.
Gross property, plant and equipment	48.2	43.3
Plant
Property, plant and equipment.
Gross property, plant and equipment	176.4	144.7
Equipment
Property, plant and equipment.
Gross property, plant and equipment	$ 489.0	$ 479.3