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, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost(1)	$ 13	$ 16	$ 27	$ 32
Interest cost	69	62	138	122
Expected return on plan assets	(116)	(111)	(232)	(220)
Amortization of actuarial loss	30	56	61	111
Amortization of prior service cost (credit)	2	1	3	3
Total net periodic benefit cost (credit)	(2)	24	(3)	48
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost(1)	0	1	0	1
Interest cost	2	3	5	6
Amortization of actuarial loss	3	4	6	7
Amortization of prior service cost (credit)	(47)	(6)	(95)	(12)
Other	0	2	(4)	2
Total net periodic benefit cost (credit)	(42)	4	(88)	4
Real Estate Divestiture | Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost(1)	$ 1	$ 2	$ 2	$ 3