EMPLOYEE BENEFIT PLANS - Stock-Based Compensation Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock-based compensation expense by type:
Restricted stock	$ 124	$ 145	$ 106
Stock options	13	12	9
Total stock-based compensation expense	137	157	115
Tax benefit recognized	(21)	(32)	(20)
Stock-based compensation expense, net of tax	$ 116	$ 125	$ 95