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, 2019	Dec. 31, 2018	Dec. 31, 2017
Pension Benefit Plans | United States
Defined Benefit Plan Disclosure [Line Items]
Discount rate - for determining net periodic (benefit) cost	4.25%	3.56%	4.04%
Expected rate of return on plan assets - for determining net periodic (benefit) cost	7.25%	7.50%	7.50%
Rate of compensation increase	0.00%	0.00%	0.00%
Discount rate - for determining benefit obligation	3.16%	4.25%
Rate of compensation increase - for determining benefit obligation	0.00%	0.00%
Pension Benefit Plans | Ireland, Germany, and Japan
Defined Benefit Plan Disclosure [Line Items]
Discount rate - for determining net periodic (benefit) cost	2.39%	2.29%	2.08%
Expected rate of return on plan assets - for determining net periodic (benefit) cost	3.46%	3.66%	3.84%
Rate of compensation increase	2.89%	2.87%	2.64%
Discount rate - for determining benefit obligation	1.68%	2.39%
Rate of compensation increase - for determining benefit obligation	3.05%	2.89%
U.S. Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Discount rate - for determining net periodic (benefit) cost	4.16%	3.47%	3.85%
Expected rate of return on plan assets - for determining net periodic (benefit) cost	0.00%	0.00%	0.00%
Rate of compensation increase	0.00%	0.00%	0.00%
Discount rate - for determining benefit obligation	3.04%	4.16%
Rate of compensation increase - for determining benefit obligation	0.00%	0.00%