RETIREMENT BENEFITS - Assumptions Used (Details)	3 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
U.S. | Postretirement Benefit Plans
Plan Assumptions - During the year
Discount rate	3.85%	3.90%
Plan Assumptions - At year end
Discount rate	3.60%	3.85%	3.90%
Non-U.S. plans | Pension Plans | Weighted Average
Plan Assumptions - During the year
Discount rate	4.83%	5.08%
Plan Assumptions - At year end
Discount rate	4.87%	4.83%	5.08%
Non-U.S. plans | Pension Plans | Minimum
Plan Assumptions - During the year
Discount rate	0.55%	0.60%
Plan Assumptions - At year end
Discount rate	0.65%	0.55%	0.60%
Non-U.S. plans | Pension Plans | Maximum
Plan Assumptions - During the year
Discount rate	10.45%	11.00%
Plan Assumptions - At year end
Discount rate	10.90%	10.45%	11.00%
Non-U.S. plans | Postretirement Benefit Plans
Plan Assumptions - During the year
Discount rate	9.25%	9.65%
Plan Assumptions - At year end
Discount rate	9.05%	9.25%	9.65%
Qualified plans | U.S. | Pension Plans
Plan Assumptions - During the year
Discount rate	4.05%	4.10%
Plan Assumptions - At year end
Discount rate	3.80%	4.05%	4.10%
Nonqualified plans | U.S. | Pension Plans
Plan Assumptions - During the year
Discount rate	3.95%	4.00%
Plan Assumptions - At year end
Discount rate	3.75%	3.95%	4.00%