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, Amortization of Net Gains (Losses)	$ (790)
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	25
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit Obligations, Beginning Balance	22,763	21,158
Service cost	378	347	309
Interest cost	1,093	1,121	1,098
Plan participants' contributions	38	31
Actuarial changes in assumptions and experience	3,811	1,562
Acquisition/divestiture/other activity	(51)	(20)
Benefits paid	(1,347)	(1,277)
Currency impact	150	(129)
Termination benefits/curtailment cost	5	(30)
Benefit Obligations, Ending Balance	26,840	22,763	21,158
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning balance	16,119	15,851
Actual return on plan assets	1,950	853
Currency impact	129	(121)
Employer contributions	903	806
Plan participants' contributions	38	31
Acquisition/divestiture/other activity	(67)	(24)
Benefits paid	(1,347)	(1,277)
Fair value of plan assets, ending balance	17,725	16,119	15,851
Funded status at end of year	(9,115)	(6,644)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent assets	92	366
Current liabilities	(69)	(64)
Noncurrent liabilities	(9,138)	(6,946)
Net amounts recognized in the consolidated balance sheets	(9,115)	(6,644)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net loss (gain)	10,951	8,335
Prior service cost (credit)	128	154
Pretax balance in AOCI at end of year	(11,079)	(8,489)
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Amortization of Net Gains (Losses)	(3)
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	(3)
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit Obligations, Beginning Balance	2,088	2,095
Service cost	17	15	15
Interest cost	92	100	111
Plan participants' contributions	0	0
Actuarial changes in assumptions and experience	164	20
Acquisition/divestiture/other activity	0	16
Benefits paid	(164)	(154)
Currency impact	4	(4)
Termination benefits/curtailment cost	9	0
Benefit Obligations, Ending Balance	2,210	2,088	2,095
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning balance	154	238
Actual return on plan assets	1	6
Currency impact	0	0
Employer contributions	(10)	(16)
Plan participants' contributions	0	0
Acquisition/divestiture/other activity	0	0
Benefits paid	(80)	(74)
Fair value of plan assets, ending balance	65	154	238
Funded status at end of year	(2,145)	(1,934)
Defined Benefit Plan, Amounts Recognized in Balance Sheet [Abstract]
Noncurrent assets	0	0
Current liabilities	(99)	(82)
Noncurrent liabilities	(2,046)	(1,852)
Net amounts recognized in the consolidated balance sheets	(2,145)	(1,934)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax [Abstract]
Net loss (gain)	155	(7)
Prior service cost (credit)	(11)	(15)
Pretax balance in AOCI at end of year	$ (144)	$ 22