EMPLOYEE BENEFIT PLANS - FUNDED STATUS (DETAILS) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Qualified Defined Benefit [Member]
Benefit obligation
Beginning of year	$ 1,873	$ 1,594
Service cost	46	38	35
Interest cost	73	73	73
Actuarial (gain) loss	(226)	214
Benefits paid	(57)	(46)
End of year	1,709	1,873	1,594
Accumulated benefit obligation	1,603	1,733
Plan assets at fair value
Beginning of year	1,538	1,288
Actual return on plan assets	205	186
Employer contributions	83	110
Benefits paid	(57)	(46)
End of year	1,769	1,538	1,288
Funded status (unfunded)	60	(335)
Percent funded	104.00%	82.00%
Nonqualified Defined Benefit [Member]
Benefit obligation
Beginning of year	42	43
Service cost	1	1	1
Interest cost	1	2	2
Actuarial (gain) loss	(4)	(2)
Benefits paid	(2)	(2)
End of year	38	42	43
Accumulated benefit obligation	38	41
Plan assets at fair value
Beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	2	2
Benefits paid	(2)	(2)
End of year	0	0	0
Funded status (unfunded)	(38)	(42)
Postretirement Medical Benefits [Member]
Benefit obligation
Beginning of year	117	120
Service cost	5	5	6
Interest cost	4	5	7
Actuarial (gain) loss	(35)	(11)
Benefits paid	(2)	(2)
End of year	89	117	120
Plan assets at fair value
Beginning of year	0	0
Employer contributions	2	2
Benefits paid	(2)	(2)
End of year	0	0	0
Funded status (unfunded)	$ (89)	$ (117)