PENSION AND POSTRETIREMENT BENEFIT PLANS (Changes in Defined Benefit and Postretirement Benefit Plan Assets and Obligations) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of year	$ 6,162
Fair value of plan assets at end of year	7,114	$ 6,162
Accrued liabilities	(40)	(44)
Accumulated benefit obligation	6,749	6,381
Defined Benefit Plan, Plan with Benefit Obligation in Excess of Plan Assets [Abstract]
Pension plans with projected benefit obligations in excess of plan assets, Projected benefit obligation	1,166	6,195
Pension plans with projected benefit obligations in excess of plan assets, Fair value of plan assets	678	5,559
Defined Benefit Plan, Pension Plan with Accumulated Benefit Obligation in Excess of Plan Assets [Abstract]
Pension plans with accumulated benefit obligations in excess of plan assets, Accumulated benefit obligation	1,008	5,978
Pension plans with accumulated benefit obligations in excess of plan assets, Fair value of plan assets	550	5,380
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation
Benefit obligations at the beginning of year	6,440	6,418
Service cost - benefits earned during the year	25	24	$ 25
Interest cost on projected benefit obligation	188	192	242
Settlements	(330)	(173)
Actuarial (gains)/losses	368	253
Benefits paid	(121)	(109)
Foreign currency and other	179	(165)
Benefit obligations at the end of the year	6,749	6,440	6,418
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of year	5,831	5,687
Actual return on plan assets	804	513
Employer contributions	396	81
Settlements	(330)	(173)
Benefits paid	(121)	(109)
Exchange rate losses	169	(168)
Fair value of plan assets at end of year	6,749	5,831	$ 5,687
Funded Status		(609)
Other assets	487	26
Accrued liabilities	(31)	(35)
Pension and other liabilities	(456)	(600)
Net actuarial losses	2,849	3,123
Prior service credit	(36)	(39)
Total recognized in other comprehensive loss, pre-tax	2,813	3,084
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Change in Benefit Obligation
Benefit obligations at the beginning of year	308
Benefit obligations at the end of the year	298	308
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair value of plan assets at beginning of year	331
Fair value of plan assets at end of year	$ 364	$ 331