EMPLOYEE BENEFIT PLANS - NET PENSION EXPENSE (DETAILS) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Qualified Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	$ 46	$ 38	$ 35
Interest cost	73	73	73
Expected return on assets	(111)	(93)	(88)
Amortization of prior service cost	(1)	(1)	(1)
Recognized actuarial (gain) loss	43	40	23
Net periodic benefit cost	50	57	42
Nonqualified Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	1	1	1
Interest cost	1	2	2
Expected return on assets	0	0	0
Amortization of prior service cost	0	0	0
Recognized actuarial (gain) loss	1	1	1
Net periodic benefit cost	3	4	4
Anticipated funding in 2013	2
Postretirement Medical Benefits [Member]
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost	5	5	6
Interest cost	4	5	7
Amortization of prior service cost	1	1	1
Recognized actuarial (gain) loss	(2)	(1)	1
Net periodic benefit cost	8	10	15
Anticipated funding in 2013	$ 3