PENSION AND POST-RETIREMENT BENEFITS - Weighted Average Risk Target Ranges Per Asset Class (Details)	Dec. 31, 2017
United States | Minimum | Common and preferred stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	0.00%
United States | Minimum | Mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	20.00%
United States | Minimum | Fixed income securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	10.00%
United States | Minimum | Common and collective funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	30.00%
United States | Minimum | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	5.00%
United States | Minimum | Cash and other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	0.00%
United States | Maximum | Common and preferred stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	10.00%
United States | Maximum | Mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	30.00%
United States | Maximum | Fixed income securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	20.00%
United States | Maximum | Common and collective funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	50.00%
United States | Maximum | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	15.00%
United States | Maximum | Cash and other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	10.00%
Foreign Plan [Member] | Common and preferred stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	0.00%
Foreign Plan [Member] | Mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	0.00%
Foreign Plan [Member] | Fixed income securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	0.00%
Foreign Plan [Member] | Common and collective funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	100.00%
Foreign Plan [Member] | Hedge funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	0.00%
Foreign Plan [Member] | Cash and other investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Target ranges	0.00%