SEGMENT AND GEOGRAPHIC INFORMATION - CAPITAL EXPENDITURES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Capital expenditures	$ 144.3	$ 125.0	$ 72.0
Operating Segments | Technologies & Equipment
Capital expenditures	98.6	73.7	22.1
Operating Segments | Consumables
Capital expenditures	37.6	42.2	39.1
All Other
Capital expenditures	$ 8.1	$ 9.1	$ 10.8