EMPLOYEE BENEFITS - Plan Amounts Recognized in OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Net periodic pension income	$ (1)	$ (7)	$ (8)
Net actuarial loss	54	7	237
Amortization of prior service credit	1	0	0
Amortization of net actuarial loss	(16)	(15)	(10)
Divestiture	0	0	(35)
Total recognized in other comprehensive income (loss)	39	(8)	192
Total recognized in net periodic pension cost and other comprehensive income (loss)	$ 38	$ (15)	$ 184