POSTRETIREMENT BENEFIT PLANS Pension Plan Termination (Details) - USD ($) $ in Millions		9 Months Ended
	Oct. 20, 2020	Sep. 30, 2020	Sep. 30, 2019
Subsequent Event [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer		$ 7.2	$ 19.7
US. Qualified Pension Plan Termination [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 321.0
Defined Benefit Plan, Plan Assets, Contributions by Employer	8.4
US. Qualified Pension Plan Termination [Member] | Subsequent Event [Member] | Minimum [Member]
Subsequent Event [Line Items]
Estimated Non Cash Pension Settlement Charge	135.0
US. Qualified Pension Plan Termination [Member] | Subsequent Event [Member] | Maximum [Member]
Subsequent Event [Line Items]
Estimated Non Cash Pension Settlement Charge	$ 140.0