PENSION AND POSTRETIREMENT BENEFIT PLANS (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Percentage of plan assets attributable to the principal defined benefit pension plan	66.00%
Percentage of plan obligations attributable to the principal defined benefit pension plan	61.00%
Pension Plans, Defined Benefit [Member]
Compensation and Retirement Disclosure [Abstract]
Discount rate used to determine benefit obligations	3.50%	3.80%
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Service cost - benefits earned during the year	$ 24	$ 25	$ 34
Interest cost on projected benefit obligation	192	242	305
Expected return on plan assets	(418)	(405)	(508)
Amortization of prior service costs	(3)	(3)	(3)
Amortization of net actuarial (gain)/loss	84	91	110
Curtailments		(1)	1
Settlements	91	161	866
Special termination benefits	1		14
Total net periodic benefit cost/(credit)	(29)	110	819
Pension obligation settlement	$ 173	$ 336
Other Postretirement Benefit Plans, Defined Benefit [Member]
Compensation and Retirement Disclosure [Abstract]
Discount rate used to determine benefit obligations	3.60%	3.60%
United States Pension Plans
Pension, Postretirement And Postemployment Liabilities Statement [Line Items]
Settlements			713
Pension obligation settlement			$ 1,500