FINANCIAL INSTRUMENTS - Schedule of Effects of Derivatives on Earnings (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effect on earnings	$ (253)	$ (171)	$ (420)	$ (360)
Cash flow hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effect on hedging instrument	34	11	56	(45)
Effect on underlying	(34)	(12)	(56)	45
Effect on earnings	0	0	0	1
Fair value hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effect on hedging instrument	(57)	888	(282)	2,610
Effect on underlying	2	(933)	164	(2,688)
Effect on earnings	(56)	(46)	(118)	(77)
Net investment hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effect on hedging instrument	(487)	(604)	(1,050)	(2)
Effect on underlying	490	609	1,063	40
Effect on earnings	3	5	13	37
Economic hedges
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Effect on hedging instrument	979	157	641	(122)
Effect on underlying	(1,180)	(286)	(956)	(198)
Effect on earnings	$ (200)	$ (130)	$ (315)	$ (321)