INCOME TAX (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current [Abstract]
U.S. Federal	$ (21)	$ 2,061	$ 869
U.S. State	89	62	97
Non-U.S.	1,177	787	559
Current tax expense	1,245	2,910	1,525
Deferred [Abstract]
U.S. Federal	396	190	40
U.S. State	8	139	17
Non-U.S.	(990)	2,123	21
Deferred tax expense	(586)	2,452	78
Tax expense	659	5,362	1,603
Income before taxes
U.S.	2,919	2,873	2,981
Non-U.S.	4,568	4,077	3,471
Income before taxes	$ 7,487	$ 6,950	$ 6,452