PENSION AND OTHER POSTRETIREMENT BENEFITS - Strategic Target Asset Allocation (Details)	Dec. 31, 2021
Minimum | Equity investments
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	40.00%
Minimum | Fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	25.00%
Minimum | Alternative investments
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	10.00%
Minimum | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	0.00%
Maximum | Equity investments
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	60.00%
Maximum | Fixed income investments
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	35.00%
Maximum | Alternative investments
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	25.00%
Maximum | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation	10.00%