POSTRETIREMENT BENEFIT PLANS Postretirement Textuals (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Defined Benefit Plan, Plan Assets, Administration Expense	$ 0.9	$ 0.8
Defined Benefit Plan, Plan Assets, Contributions by Employer	3.5	3.5
Reclassification of Postretirement Costs from AOCI, Net of Tax	1.1	$ 1.1
Minimum [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	10.0
Maximum [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 14.0