PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Net Periodic Benefit Cost and Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income for All Significant Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 28	$ 25	$ 16
Interest cost	189	200	209
Expected return on plan assets	(235)	(255)	(264)
Amortization of prior service cost (credit)	7	7	7
Amortization of net loss	60	85	59
Net periodic benefit cost (credit)	49	62	27
Net (gain) loss	375	254	100
Amortization of prior service (cost) credit	(7)	(7)	(7)
Amortization of net loss	(60)	(85)	(59)
Total recognized in other comprehensive (income) loss	308	162	34
Total recognized in net periodic benefit cost and other comprehensive loss	357	224	61
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	2	2	2
Interest cost	17	19	23
Expected return on plan assets	0	0	0
Amortization of prior service cost (credit)	(2)	(2)	(2)
Amortization of net loss	0	0	0
Net periodic benefit cost (credit)	17	19	23
Net (gain) loss	16	(4)	(7)
Amortization of prior service (cost) credit	2	2	2
Amortization of net loss	0	0	0
Total recognized in other comprehensive (income) loss	18	(2)	(5)
Total recognized in net periodic benefit cost and other comprehensive loss	$ 35	$ 17	$ 18