INCOME TAXES - Summary of Valuation Allowance Against Certain Foreign Net Deferred Tax Assets and State Net Operating Losses (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Movement in Valuation Allowance of Deferred Tax Assets [Roll Forward]
Balance at beginning of year	$ 3,816	$ 5,401	$ 5,434
State	15	139	(43)
U.S.	124	905	139
Foreign	(8)	(2,629)	(129)
Balance at end of year	$ 3,947	$ 3,816	$ 5,401