INCOME TAXES - Consolidated (Benefit) Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
U.S. Federal
Current	$ 939	$ 146	$ 1,019
Deferred	(2,032)	(1,266)	(3,144)
Non - U.S.
Current	1,331	2,008	1,132
Deferred	(793)	106	1,197
Other	80	(267)	(111)
Total consolidated	$ (474)	$ 726	$ 93