PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Components of Net Periodic Benefit Costs (Credits) (Detail) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 11	$ 11	$ 36	$ 33
Interest cost	68	70	207	208
Expected return on plan assets	(104)	(113)	(315)	(336)
Amortization of actuarial loss	33	15	102	46
Amortization of prior service costs (credits)	3	4	10	13
Loss due to curtailment and special termination benefits	13	2	14	5
Total net periodic benefit costs (credits)	24	(11)	54	(31)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	0	2	1
Interest cost	6	5	18	18
Amortization of actuarial loss	3	3	10	9
Amortization of prior service costs (credits)	(6)	(5)	(17)	(16)
Adjustments	0	0	4	0
Total net periodic benefit costs (credits)	$ 4	$ 3	$ 17	$ 12