INCOME TAXES - COMPONENTS OF INCOME TAX EXPENSE (BENEFIT) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Current
Federal	$ (126)	$ 33	$ (23)
State and Local	6	46	52
Foreign	465	1,809	1,077
Total current tax expense	345	1,888	1,106
Deferred
Federal	(2,384)	(130)	422
State and Local	(103)	17	12
Foreign	(30)	(914)	(63)
Total deferred tax expense (benefit)	(2,517)	(1,027)	371
Total income tax expense (benefit)	$ (2,172)	$ 861	$ 1,477