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, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 13	$ 11	$ 39	$ 36
Interest cost	65	68	196	207
Expected return on plan assets	(106)	(104)	(316)	(315)
Amortization of actuarial loss	44	33	131	102
Amortization of prior service cost (credit)	2	3	6	10
Loss due to curtailment and special termination benefits	0	13	0	14
Total net periodic benefit cost (credit)	18	24	56	54
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	1	1	2
Interest cost	4	6	11	18
Amortization of actuarial loss	3	3	10	10
Amortization of prior service cost (credit)	(6)	(6)	(121)	(17)
Other	0	0	4	4
Total net periodic benefit cost (credit)	$ 1	$ 4	$ (95)	$ 17