EMPLOYEE BENEFIT PLANS - Weighted-average assumptions used to determine net periodic benefit costs and benefit obligations (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S. defined benefit pension plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate - for determining net periodic benefit cost	3.90%	4.70%	4.50%
Expected rate of return on plan assets - for determining net periodic benefit cost	7.50%	7.50%	7.50%
Rate of compensation increase	0.00%	0.00%	0.00%
Discount rate - for determining benefit obligation	4.34%	3.90%
Rate of compensation increase - for determining benefit obligation	0.00%	0.00%
U.S. postretirement benefit plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate - for determining net periodic benefit cost	3.70%	4.30%	4.50%
Expected rate of return on plan assets - for determining net periodic benefit cost	5.50%	5.50%	5.50%
Rate of compensation increase	0.00%	0.00%	0.00%
Discount rate - for determining benefit obligation	4.13%	3.70%
Rate of compensation increase - for determining benefit obligation	0.00%	0.00%
Non-U.S. defined benefit pension plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate - for determining net periodic benefit cost	2.41%	3.86%	3.61%
Expected rate of return on plan assets - for determining net periodic benefit cost	5.60%	5.63%	5.59%
Rate of compensation increase	2.86%	2.88%	2.80%
Discount rate - for determining benefit obligation	2.74%	2.41%
Rate of compensation increase - for determining benefit obligation	2.87%	2.86%