INCOME TAXES - Provision for Income Taxes (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Federal	$ 139	$ 1,324	$ 921
States and Puerto Rico	58	116	88
Total current provision	197	1,440	1,009
Deferred expense (benefit)	194	132	(71)
Provision for income taxes	$ 391	$ 1,572	$ 938