EMPLOYEE BENEFIT PLANS - NET PENSION EXPENSE (DETAILS) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Qualified Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 8	$ 11
Interest cost	20	18
Expected return on assets	(29)	(27)
Amortization of prior service cost	0	0
Recognized actuarial loss (gain)	3	10
Net pension expense	2	12
Nonqualified Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	0	0
Interest cost	0	1
Expected return on assets	0	0
Amortization of prior service cost	0	0
Recognized actuarial loss (gain)	0	0
Net pension expense	0	1
Postretirement Medical Benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	1	1
Interest cost	1	1
Expected return on assets	0	0
Amortization of prior service cost	0	0
Recognized actuarial loss (gain)	(1)	0
Net pension expense	$ 1	$ 2