EQUITY (Other Comprehensive Income/(Loss)) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Other Comprehensive Income (Loss), before Tax [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	$ (38)	$ (34)	$ 221	$ 63
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, before Tax	53	(32)	89	(52)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax	15	(66)	310	11
Pension and postretirement benefits - Actuarial gains/(losses), Pre-tax	1	(20)	22	(12)
Pension and postretirement benefits - Amortization, Pre-tax	10	9	19	18
Pension and postretirement benefits - Curtailments and settlements, Pre-Tax	5	2	6	4
Pension and postretirement benefits, Pre-tax	16	(9)	47	10
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments and Tax	(3)	12	(6)	14
Other Comprehensive Income (Loss), Available-for-sale Securities, before Reclassification Adjustments, Tax	(1)	3	(2)	4
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Tax	(3)	11	(6)	13
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax	0	(1)	0	(1)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax	0	(1)	0	(1)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, before Reclassification Adjustments, after Tax	(2)	9	(4)	10
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	0	0	0	0
Available-for-sale debt securities	(2)	8	(4)	9
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax	3	45	12	(65)
Other Comprehensive Income/(Loss), Pre-tax	31	(19)	363	(31)
Other Comprehensive Income (Loss), Tax, Parenthetical Disclosures [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax	(3)	4	(14)	(6)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	(6)	3	(10)	6
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, Tax	(9)	7	(24)	0
Pension and postretirement benefits - Actuarial gains/(losses), Tax	2	5	(3)	3
Pension and postretirement benefits - Amortization, Tax	(2)	(2)	(5)	(3)
Pension and postretirement benefits - Curtailments and settlements, Tax	(1)	(1)	(1)	(1)
Pension and postretirement benefits, Tax	(1)	2	(9)	(1)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, Tax, Total	(1)	3	(2)	4
Foreign currency translation, Tax	4	6	(11)	0
Other comprehensive income/(loss), Tax	(5)	12	(42)	(5)
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax	(41)	(30)	207	57
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	47	(29)	79	(46)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	6	(59)	286	11
Pension and postretirement benefits - Actuarial gains/(losses), After tax	3	(15)	19	(9)
Pension and postretirement benefits - Amortization, After tax	8	7	14	15
Pension and postretirement benefits - Curtailments and settlements, After tax	4	1	5	3
Pension and postretirement benefits, After tax	15	(7)	38	9
Foreign currency translation	7	51	1	(65)
Other Comprehensive Income/(Loss)	26	$ (7)	321	$ (36)
Derivatives qualifying as cash flow hedges	49		49		$ (237)
Pension and postretirement benefits	(936)		(936)		(974)
Available-for-sale securities	7		7		11
Foreign currency translation	(638)		(638)		(639)
Accumulated other comprehensive loss	$ (1,518)		$ (1,518)		$ (1,839)