RETIREMENT PLANS - Allocation Plan Assets (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
U.S. Pension and Postretirement Health Care Benefits
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	100.00%	100.00%
PERCENTAGE OF PLAN ASSETS	100.00%	100.00%
U.S. Pension and Postretirement Health Care Benefits | Cash
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	0.00%
PERCENTAGE OF PLAN ASSETS	0.00%
U.S. Pension and Postretirement Health Care Benefits | Large cap equity
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	34.00%	34.00%
PERCENTAGE OF PLAN ASSETS	36.00%	37.00%
U.S. Pension and Postretirement Health Care Benefits | Small cap equity
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	9.00%	9.00%
PERCENTAGE OF PLAN ASSETS	9.00%	10.00%
U.S. Pension and Postretirement Health Care Benefits | International equity
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	15.00%	15.00%
PERCENTAGE OF PLAN ASSETS	15.00%	14.00%
U.S. Pension and Postretirement Health Care Benefits | Core fixed income
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	18.00%	18.00%
PERCENTAGE OF PLAN ASSETS	18.00%	19.00%
U.S. Pension and Postretirement Health Care Benefits | High-yield bonds
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	5.00%	5.00%
PERCENTAGE OF PLAN ASSETS	5.00%	5.00%
U.S. Pension and Postretirement Health Care Benefits | Emerging markets
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	2.00%	2.00%
PERCENTAGE OF PLAN ASSETS	2.00%	2.00%
U.S. Pension and Postretirement Health Care Benefits | Real estate
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	6.00%	6.00%
PERCENTAGE OF PLAN ASSETS	7.00%	5.00%
U.S. Pension and Postretirement Health Care Benefits | Hedge funds
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	5.00%	5.00%
PERCENTAGE OF PLAN ASSETS	3.00%	3.00%
U.S. Pension and Postretirement Health Care Benefits | Private Equity
Asset allocation percentages
TARGET ASSET ALLOCATION PERCENTAGE	6.00%	6.00%
PERCENTAGE OF PLAN ASSETS	5.00%	5.00%
International Pension
Asset allocation percentages
PERCENTAGE OF PLAN ASSETS	100.00%	100.00%
International Pension | Cash
Asset allocation percentages
PERCENTAGE OF PLAN ASSETS	1.00%
International Pension | International equity
Asset allocation percentages
PERCENTAGE OF PLAN ASSETS	44.00%	44.00%
International Pension | Corporate bonds
Asset allocation percentages
PERCENTAGE OF PLAN ASSETS	21.00%	22.00%
International Pension | Government bonds
Asset allocation percentages
PERCENTAGE OF PLAN ASSETS	19.00%	19.00%
International Pension | Total fixed income
Asset allocation percentages
PERCENTAGE OF PLAN ASSETS	40.00%	41.00%
International Pension | Insurance company accounts
Asset allocation percentages
PERCENTAGE OF PLAN ASSETS	14.00%	13.00%
International Pension | Real estate
Asset allocation percentages
PERCENTAGE OF PLAN ASSETS	1.00%	2.00%