PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Costs (Credits) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 12	$ 13	$ 26	$ 25
Interest cost	66	70	131	139
Expected return on plan assets	(105)	(106)	(210)	(211)
Amortization of actuarial loss	45	34	87	69
Amortization of prior service cost (credit)	2	3	4	7
Loss due to curtailment and special termination benefits	0	0	0	1
Total net periodic benefit cost (credit)	20	14	38	30
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	0	1	1
Interest cost	3	6	7	12
Amortization of actuarial loss	3	4	7	7
Amortization of prior service cost (credit)	(57)	(5)	(115)	(11)
Other	0	0	4	4
Total net periodic benefit cost (credit)	$ (50)	$ 5	$ (96)	$ 13