EMPLOYEE BENEFIT PLANS Table 9 - Assumptions - Health Care Cost Trend Rates (Details) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Defined Benefit Plan Disclosure [Line Items] | ||
| Health care cost trend rate assumed for next year | 6.84% | 6.84% |
| Rate to which the cost trend rate was assumed to decrease (the ultimate trend rate) | 5.00% | 5.00% |
| Year that the rate reaches the ultimate trend rate | 2028 | 2028 |
| Other Postretirement Benefit Plans [Member] | ||
| Defined Benefit Plan Disclosure [Line Items] | ||
| Cap on increase in the employer's cost | The cap on the increase in employer’s cost is 2.5% per year. | |