PENSION AND OTHER POSTRETIREMENT BENEFITS (Details 5) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined contribution plan
Total expense	$ 5.6	$ 2.5	$ 2.0
Contribution plan for Canadian, Belgium and United Kingdom employees
Defined contribution plan
Total expense	$ 1.0	$ 1.2	$ 1.2