PENSION AND POSTRETIREMENT EMPLOYEE BENEFIT PLANS - Weighted-average assumptions used to determine net periodic benefit costs and benefit obligations (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Pension Benefit Plans | U.S. Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate - for determining net periodic (benefit) cost	3.56%	4.04%	4.34%
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	4.25%	3.56%
Rate of compensation increase - for determining benefit obligation	0.00%	0.00%
Pension Benefit Plans | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate - for determining net periodic (benefit) cost	2.29%	2.08%	2.74%
Expected rate of return on plan assets - for determining net periodic (benefit) cost	3.66%	3.84%	5.46%
Rate of compensation increase	2.87%	2.64%	2.87%
Discount rate - for determining benefit obligation	2.39%	2.29%
Rate of compensation increase - for determining benefit obligation	2.89%	2.87%
U.S. Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate - for determining net periodic (benefit) cost	3.47%	3.85%	4.13%
Expected rate of return on plan assets - for determining net periodic (benefit) cost	0.00%	0.00%	5.50%
Rate of compensation increase	0.00%	0.00%	0.00%
Discount rate - for determining benefit obligation	4.16%	3.47%
Rate of compensation increase - for determining benefit obligation	0.00%	0.00%