RETIREMENT AND POSTRETIREMENT PLANS - Weighted average allocation by asset category (Details)	Dec. 31, 2021	Dec. 31, 2020
Retirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Actual Asset category	100.00%
Retirement Plans [Member] | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual Asset category	60.00%
Retirement Plans [Member] | Debt securities (bond mutual funds)
Defined Benefit Plan Disclosure [Line Items]
Actual Asset category	37.00%
Retirement Plans [Member] | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Actual Asset category	3.00%
Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Actual Asset category	100.00%	100.00%
Employee Retirement Plan | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Actual Asset category	54.00%	67.00%
Employee Retirement Plan | Debt securities (bond mutual funds)
Defined Benefit Plan Disclosure [Line Items]
Actual Asset category	42.00%	30.00%
Employee Retirement Plan | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Actual Asset category	4.00%	3.00%