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PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Other Postretirement Benefits) (Details) - United States - Other Postretirement Benefits
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]      
Discount rate - benefit obligations 4.24% 3.51%  
Discount rate - net periodic costs 3.51% 3.83% 3.96%
Health Care Cost Trend Rate Assumed for Next Year - benefit obligations 6.50% 6.75%  
Health Care Cost Trend Rate Assumed for Next Year - net periodic costs 6.75% 7.00% 7.25%
Rate to which the cost trend rate is assumed to decline (the ultimate health care cost trend rate) - benefit obligations 5.00% 5.00%  
Rate to which the cost trend rate is assumed to decline (the ultimate health care cost trend rate) - net periodic costs 5.00% 5.00% 5.00%
Year that the Rate Reaches the Ultimate Health Care Cost Trend Rate 2025 2025 2025