EMPLOYEE BENEFIT PLANS - Target Asset Allocation Percentages (Details) - Pension Benefits	Dec. 31, 2021
Fixed Income
Employee benefit plans
Target asset allocation percentages	40.00%
Total Domestic Equity:
Employee benefit plans
Target asset allocation percentages	50.00%
Domestic Equity: Small/Mid Cap Stocks
Employee benefit plans
Target asset allocation percentages	15.00%
Domestic Equity: Large Cap Stocks
Employee benefit plans
Target asset allocation percentages	35.00%
Non U.S. Equities
Employee benefit plans
Target asset allocation percentages	10.00%
Minimum | Fixed Income
Employee benefit plans
Target asset allocation percentages	25.00%
Minimum | Total Domestic Equity:
Employee benefit plans
Target asset allocation percentages	30.00%
Minimum | Domestic Equity: Small/Mid Cap Stocks
Employee benefit plans
Target asset allocation percentages	5.00%
Minimum | Domestic Equity: Large Cap Stocks
Employee benefit plans
Target asset allocation percentages	25.00%
Minimum | Non U.S. Equities
Employee benefit plans
Target asset allocation percentages	5.00%
Maximum | Fixed Income
Employee benefit plans
Target asset allocation percentages	55.00%
Maximum | Total Domestic Equity:
Employee benefit plans
Target asset allocation percentages	70.00%
Maximum | Domestic Equity: Small/Mid Cap Stocks
Employee benefit plans
Target asset allocation percentages	25.00%
Maximum | Domestic Equity: Large Cap Stocks
Employee benefit plans
Target asset allocation percentages	45.00%
Maximum | Non U.S. Equities
Employee benefit plans
Target asset allocation percentages	15.00%