POSTRETIREMENT BENEFIT PLANS Postretirement Textuals (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement				$ 1.4
Defined Benefit Plan, Plan Assets, Contributions by Employer			$ 19.7	9.7
Reclassification of Postretirement Costs from AOCI, Net of Tax	$ 0.6	$ 2.1	1.7	4.3
Minimum [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	3.0		3.0
Maximum [Member]
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year	$ 4.0		$ 4.0
Discretionary Contribution [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer				$ 9.0