RETIREMENT BENEFITS - Net (Benefit) Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Defined Benefit Plan Disclosure
Percentage of the significant plans over global pension and postretirement liabilities, which utilize quarterly measurement policy	90.00%		90.00%
U.S. Pension Plans
Amortization of unrecognized
Total net (benefit) expense	$ (35)	$ (43)	$ (70)	$ (84)
U.S. Qualified Pension Plan
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Benefits earned during the period	0	1	2	3
Interest cost on benefit obligation	131	138	268	278
Expected return on plan assets	(223)	(219)	(445)	(436)
Amortization of unrecognized
Prior service (benefit) cost	(1)	(1)	(2)	(2)
Net actuarial loss	38	26	75	49
Curtailment loss	10	0	10	0
Settlement loss (gain)	0	0	0	0
Total net (benefit) expense	(45)	(55)	(92)	(108)
U.S. Nonqualified Pension Plan
Amortization of unrecognized
Total net (benefit) expense	10	12	22	24
Non - U.S. Pension Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Benefits earned during the period	43	47	87	93
Interest cost on benefit obligation	80	98	160	194
Expected return on plan assets	(83)	(98)	(167)	(193)
Amortization of unrecognized
Prior service (benefit) cost	0	1	0	2
Net actuarial loss	18	20	39	40
Curtailment loss	0	17	0	17
Settlement loss (gain)	0	13	0	13
Total net (benefit) expense	58	98	119	166
U.S. Postretirement Benefit Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Benefits earned during the period	0	0	0	0
Interest cost on benefit obligation	8	9	16	17
Expected return on plan assets	0	0	0	(1)
Amortization of unrecognized
Prior service (benefit) cost	0	0	0	0
Net actuarial loss	0	1	0	0
Curtailment loss	0	0	0	0
Settlement loss (gain)	0	0	0	0
Total net (benefit) expense	8	10	16	16
Non-U.S. Postretirement Benefit Plans
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Benefits earned during the period	3	3	7	7
Interest cost on benefit obligation	30	31	57	60
Expected return on plan assets	(27)	(31)	(56)	(61)
Amortization of unrecognized
Prior service (benefit) cost	(3)	(3)	(6)	(6)
Net actuarial loss	12	11	23	20
Curtailment loss	0	0	0	0
Settlement loss (gain)	0	(2)	0	(2)
Total net (benefit) expense	$ 15	$ 9	$ 25	$ 18