PENSIONS AND OTHER POSTRETIREMENT BENEFITS (Contributions) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 3.7	$ 3.8
Expected employer contributions, next fiscal year	$ 3.5
Defined Benefit Plan, Funded Percentage	70.00%
Value of VEBA Trust Assets as a Percentage of the Funding Obligation	0.9
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	$ 16.4	27.6
Expected employer contributions, next fiscal year	20.2
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	2.5	3.0
Direct Payments [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	3.7	3.8
Expected employer contributions, next fiscal year	3.5
Veba Trust [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions	0.0	$ 0.0
Expected employer contributions, next fiscal year	$ 0.0