PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Change in Projected Benefit Obligations, Plan Assets and Funded Status of 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]
Defined Benefit Plan, Net Periodic Benefit Cost	$ 49	$ 62	$ 27
Defined Benefit Plan, Amortization of Net Gains (Losses)	(88)
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	7
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit Obligations, Beginning Balance	4,037	3,867
Service cost	28	25	16
Interest cost	189	200	209
Actuarial changes in assumptions and experience	472	237
Benefits paid	(286)	(288)
Other	(7)	(4)
Benefit Obligations, Ending Balance	4,433	4,037	3,867
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	3,351	3,357
Actual return on plan assets	331	238
Employer contributions	158	48
Asset transfer	(6)	(4)
Benefits Paid	(286)	(288)
Fair Value of Plan Assets, Ending	3,548	3,351	3,357
Funded status at end of year	(885)	(686)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Current liabilities	(1)	(2)
Noncurrent liabilities	(884)	(684)
Net amounts recognized in the consolidated balance sheets	(885)	(686)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net loss (gain)	1,941	1,626
Prior service cost (credit)	33	40
Pretax balance in AOCI at end of year	1,974	1,666
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost	17	19	23
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	(1)
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit Obligations, Beginning Balance	412	423
Service cost	2	2	2
Interest cost	17	19	23
Actuarial changes in assumptions and experience	16	(4)
Benefits paid	(33)	(33)
Other	0	5
Benefit Obligations, Ending Balance	414	412	423
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair Value of Plan Assets, Beginning	0	0
Actual return on plan assets	0	0
Employer contributions	0	0
Asset transfer	0	0
Benefits Paid	0	0
Fair Value of Plan Assets, Ending	0	0	0
Funded status at end of year	(414)	(412)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Current liabilities	(36)	(42)
Noncurrent liabilities	(378)	(370)
Net amounts recognized in the consolidated balance sheets	(414)	(412)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net loss (gain)	(5)	(21)
Prior service cost (credit)	(2)	(4)
Pretax balance in AOCI at end of year	$ (7)	$ (25)