EMPLOYEE BENEFIT PLANS - Stock-Based Compensation Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Stock-based compensation expense by type:
Restricted stock	$ 145	$ 106	$ 99
Stock options	12	9	10
Total stock-based compensation expense	157	115	109
Tax benefit recognized	(32)	(20)	(26)
Stock-based compensation expense, net of tax	$ 125	$ 95	$ 83