PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Costs (Credits) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 16	$ 13	$ 48	$ 39
Interest cost	61	65	183	196
Expected return on plan assets	(109)	(106)	(329)	(316)
Amortization of actuarial loss	55	44	166	131
Amortization of prior service cost (credit)	2	2	5	6
Total net periodic benefit cost (credit)	25	18	73	56
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	1	1
Interest cost	3	4	9	11
Amortization of actuarial loss	4	3	11	10
Amortization of prior service cost (credit)	(5)	(6)	(17)	(121)
Other	0	0	2	4
Total net periodic benefit cost (credit)	$ 2	$ 1	$ 6	$ (95)