EMPLOYEE BENEFIT PLANS (Percentage of Pension Plan Assets By Asset Category) (Details)	Dec. 31, 2018	Dec. 31, 2017
Pension Benefits
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	100.00%	100.00%
Pension Benefits | Equity Securities
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	45.00%	46.00%
Pension Benefits | Fixed Income Securities
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	45.00%	45.00%
Pension Benefits | Real Estate
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	8.00%	7.00%
Pension Benefits | Other
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	2.00%	2.00%
Other Postretirement Benefits
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	100.00%	100.00%
Other Postretirement Benefits | Equity Securities
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	60.00%	63.00%
Other Postretirement Benefits | Fixed Income Securities
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	38.00%	35.00%
Other Postretirement Benefits | Real Estate
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	0.00%	0.00%
Other Postretirement Benefits | Other
Pension And Other Employee Benefit Plans [Line Items]
Pension plan assets allocation (in percentage)	2.00%	2.00%