EMPLOYEE BENEFIT PLANS - Schedule of Asset Allocations (Details)	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations	100.00%	100.00%
Target Asset Allocations	100.00%	100.00%
Equity securities and diversified growth funds
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations	28.10%	19.20%
Target Asset Allocations	27.50%	27.50%
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations	59.20%	79.20%
Target Asset Allocations	72.50%	72.50%
Other
Defined Benefit Plan Disclosure [Line Items]
Asset Allocations	12.70%	1.50%
Target Asset Allocations	0.00%	0.00%
Minimum | Equity securities and diversified growth funds
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocations	25.00%
Minimum | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocations	70.00%
Maximum | Equity securities and diversified growth funds
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocations	30.00%
Maximum | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocations	75.00%