EMPLOYEE-RELATED BENEFITS - Savings Plans (Details) - United States	12 Months Ended
	Dec. 31, 2020 plan
Qualified Plan
Savings Plans
Number of plans	2
Percentage of employee contributions matched	100.00%
Maximum employer match, as a percentage of eligible earnings	6.00%
Qualified Defined Contribution Plan - Salaried and other non-union employees
Savings Plans
Number of plans	1
Qualified Defined Contribution Plan - Hourly union employees
Savings Plans
Number of plans	1
Non-qualified plan
Savings Plans
Number of plans	1