EMPLOYEE BENEFIT PLANS (Target Allocation Percentages for Major Categories of Plan Assets) (Details)	12 Months Ended
	Dec. 31, 2016
Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	100.00%
Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	100.00%
Cash/Treasury Bills | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	0.00%
Cash/Treasury Bills | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	2.00%
United States Large Cap | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	17.00%
United States Large Cap | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	39.00%
United States Small Cap | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	5.00%
United States Small Cap | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	5.00%
Non-United States Developed | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	15.00%
Non-United States Developed | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	7.00%
Non-United States Emerging | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	4.00%
Non-United States Emerging | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	9.00%
Global Equity | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	5.00%
Global Equity | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	0.00%
Global Infrastructure [Member] | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	3.00%
Global Infrastructure [Member] | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	0.00%
Fixed Income | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	42.00%
Fixed Income | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	38.00%
Real Estate | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	8.00%
Real Estate | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	0.00%
Private Equity | Pension Plan [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	1.00%
Private Equity | Other Postretirement Benefits [Member]
Pension And Other Employee Benefit Plans [Line Items]
Target allocation percentage of plan assets	0.00%