PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS - WEIGHTED AVERAGE ASSUMPTIONS USED IN COMPUTING NET PERIODIC BENEFIT COST (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	3.70%	4.50%
Expected long-term return on plan assets	6.10%	6.30%	7.00%
Rate of compensation increase	3.80%	4.10%	4.00%
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.00%	3.70%	4.50%