INCOME TAXES - Summary of Valuation Allowance Against Certain Foreign Net Deferred Tax Assets and State Net Operating Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Increase (decrease) of valuation allowances	$ (116)	$ 1,000	$ 1,000
Movement in Valuation Allowance of Deferred Tax Assets [Roll Forward]
Balance at beginning of year	5,991	4,959	3,947
State	1	67	41
U.S.	(112)	960	971
Foreign	(5)	5	0
Balance at end of year	$ 5,875	$ 5,991	$ 4,959