EQUITY (Accumulated balances related to each component of other comprehensive income/(loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Derivatives qualifying as cash flow hedges	$ (19)	$ 38
Pension and other postretirement benefits	(1,883)	(2,097)
Available-for-sale securities	32	(7)
Foreign currency translation	(419)	(437)
Accumulated other comprehensive loss	(2,289)	(2,503)
Other Comprehensive Income (Loss), before Tax [Abstract]
Derivatives qualifying as cash flow hedges - Unrealized gains/(losses), Pre-tax	(101)	(5)	$ 59
Derivatives qualifying as cash flow hedges - Reclassified to net earnings, Pre-tax	19	12	(130)
Derivatives qualifying as cash flow hedges, Pre-tax	(82)	7	(71)
Pension and postretirement benefits - Actuarial gains/(losses), Pre-tax	47	(126)	(88)
Pension and postretirement benefits - Amortization, Pre-tax	77	78	85
Pension and postretirement benefits - Settlements and curtailments, Pre-tax	167	91	160
Pension and other postretirement benefits, Pre-tax	291	43	157
Available-for-sale securities - Unrealized gains/(losses), Pre-tax	38	(12)	(71)
Available-for-sale securities - Realized (gains)/losses, Pre-tax	(7)	29	3
Available-for-sale securities, Pre-tax	31	17	(68)
Foreign currency translation, Pre-tax	(20)	(33)	(17)
Other Comprehensive Income/(Loss), before Tax	220	34	1
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	(2)
Other Comprehensive Income (Loss), Tax, Parenthetical Disclosures [Abstract]
Derivatives qualifying as cash flow hedges - Unrealized gains/(losses), Tax	33		(22)
Derivatives qualifying as cash flow hedges - Reclassified to net earnings, Tax	(8)	(3)	42
Derivatives qualifying as cash flow hedges, Tax	25	(3)	20
Pension and other postretirement benefits - Actuarial gains/(losses), Tax	11	(3)	27
Pension and other postretirement benefits - Amortization, Tax	(31)	(25)	(28)
Pension and other postretirement benefits - Settlements and curtailments, Tax	(57)	(32)	(55)
Pension and other postretirement benefits, Tax	(77)	(60)	(56)
Available-for-sale securities - Unrealized gains/(losses), Tax	6	(1)	14
Available-for-sale securities, Tax	8	(1)	14
Foreign currency translation Adjustment, Tax	38	(5)	(22)
Other comprehensive income/(loss), Tax	(6)	(69)	(44)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Derivatives qualifying as cash flow hedges - Unrealized holding gains/(losses), After tax	(68)	(5)	37
Derivatives qualifying as cash flow hedges - Reclassified to net earnings After tax	11	9	(88)
Derivatives qualifying as cash flow hedges, After tax	(57)	4	(51)
Pension and other postretirement benefits - Actuarial gains/(losses), After tax	58	(129)	(61)
Pension and other postretirement benefits - Amortization, After tax	46	53	57
Pension and other postretirement benefits - Settlements and curtailments	110	59	105
Pension and other postretirement benefits, After tax	214	(17)	101
Available for sale securities - Unrealized gains/(losses), After tax	44	(13)	(57)
Available for sale securities - Realized (gains)/losses, After tax	(5)	29	3
Available-for-sale securities, After tax	39	16	(54)
Foreign currency translation, After tax	18	(38)	(39)
Total Other Comprehensive Income/(Loss)	$ 214	$ (35)	$ (43)