PENSION AND POSTRETIREMENT BENEFIT PLANS (Actuarial Assumptions) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Percentage of the higher of the market-related value or projected benefit obligation corridor not amortized	10.00%
Net actuarial loss and prior service cost expected to be amortized from accumulated other comprehensive income into net periodic benefit cost during 2018	$ 80
Pension Plans, Defined Benefit [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Discount rate used to determine benefit obligations	3.10%	3.50%
Rate of compensation increase used to determine benefit obligations	0.50%	0.50%
Discount rate used to determine net periodic benefit cost	3.50%	3.80%	3.60%
Expected long-term return on plan assets used to determine net periodic benefit cost	7.00%	7.20%	7.20%
Rate of compensation increase used to determine net periodic benefit cost	0.50%	0.50%	0.80%
Historical long-term annualized returns for U.S. pension plans, 10 years	6.80%	6.10%	6.70%
Historical long-term annualized returns for U.S. pension plans, 15 years	9.30%	7.10%	6.00%
Historical long-term annualized returns for U.S. pension plans, 20 years	7.50%	7.70%	8.10%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Discount rate used to determine benefit obligations	3.30%	3.60%
UNITED STATES | Pension Plans, Defined Benefit [Member]
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Expected weighted-average remaining lives of plan participants, which is the period over which actuarial gain/loss is amortized	34 years