EMPLOYEE BENEFITS - Schedule of Net Periodic (Income) Cost (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 1	$ 3	$ 3
Interest cost	12	11	36	34
Expected return on plan assets	(18)	(17)	(53)	(51)
Amortization of actuarial loss	2	3	7	10
Net periodic pension (income) cost	(3)	(2)	(7)	(4)
Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	3	3
Interest cost	11	10	33	31
Expected return on plan assets	(18)	(17)	(53)	(51)
Amortization of actuarial loss	2	3	6	9
Net periodic pension (income) cost	(4)	(3)	(11)	(8)
Non-Qualified Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	1	1	3	3
Expected return on plan assets	0	0	0	0
Amortization of actuarial loss	0	0	1	1
Net periodic pension (income) cost	$ 1	$ 1	$ 4	$ 4