PENSION AND OTHER POSTRETIREMENT PLANS (Schedule of Allocation of Plan Assets) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	60.00%
Weighted Average Expected Long-Term Rate of Return	8.85%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	40.00%
Weighted Average Expected Long-Term Rate of Return	3.00%
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	100.00%	100.00%
Weighted Average Expected Long-Term Rate of Return	6.50%	6.50%	6.50%
Pension Benefits | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	61.00%	59.00%
Weighted Average Expected Long-Term Rate of Return	8.85%
Pension Benefits | Equity Securities [Member] | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	55.00%
Pension Benefits | Equity Securities [Member] | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	65.00%
Pension Benefits | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	36.00%	40.00%
Weighted Average Expected Long-Term Rate of Return	3.00%
Pension Benefits | Debt Securities [Member] | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	35.00%
Pension Benefits | Debt Securities [Member] | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	45.00%
Pension Benefits | Other Debt Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	3.00%	1.00%
Weighted Average Expected Long-Term Rate of Return	0.10%
Pension Benefits | Other Debt Obligations [Member] | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	5.00%
Pension Benefits | Other Debt Obligations [Member] | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	10.00%
SERP Benefits
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	100.00%	100.00%
Weighted Average Expected Long-Term Rate of Return	6.50%	6.50%	6.50%
SERP Benefits | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	65.00%	58.00%
Weighted Average Expected Long-Term Rate of Return	8.85%
SERP Benefits | Equity Securities [Member] | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	55.00%
SERP Benefits | Equity Securities [Member] | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	65.00%
SERP Benefits | Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	34.00%	40.00%
Weighted Average Expected Long-Term Rate of Return	3.00%
SERP Benefits | Debt Securities [Member] | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	35.00%
SERP Benefits | Debt Securities [Member] | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	45.00%
SERP Benefits | Other Debt Obligations [Member]
Defined Benefit Plan Disclosure [Line Items]
Percentage of Plan Assets	1.00%	2.00%
Weighted Average Expected Long-Term Rate of Return	0.10%
SERP Benefits | Other Debt Obligations [Member] | Minimum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	5.00%
SERP Benefits | Other Debt Obligations [Member] | Maximum
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	10.00%