EMPLOYEE BENEFITS Schedule of Net Periodic (Income) Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1
Interest cost	12	12
Expected return on plan assets	(17)	(18)
Amortization of actuarial loss	4	4
Net periodic pension (income) cost	0	(1)
Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1
Interest cost	11	11
Expected return on plan assets	(17)	(18)
Amortization of actuarial loss	4	3
Net periodic pension (income) cost	(1)	(3)
Non-Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	1	1
Expected return on plan assets	0	0
Amortization of actuarial loss	0	1
Net periodic pension (income) cost	$ 1	$ 2