PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Annual Costs Related to Retirement Plans) (Details) - Pension Benefits [Member] - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Defined benefit pension plans	$ 18.0	$ 16.5	$ 23.9
Defined contribution pension plans	2.9	2.8	3.6
Other Postretirement Benefits Cost (Reversal of Cost)	(6.1)	(4.0)	4.4
Total	$ 14.8	$ 15.3	$ 31.9