PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Changes in Projected Benefit Obligations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Pension
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning	$ 6,575	$ 5,841
Service cost	64	53	48
Interest cost	244	262	276
Plan participants’ contributions	0	0
Actuarial (gains) losses	(666)	708
Foreign currency exchange rate changes	(66)	22
Benefits paid (includes lump sum settlements)	(317)	(323)
Plan amendments and other	0	12
Acquisitions	0	0
Projected benefit obligation, ending	5,834	6,575	5,841
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation, beginning	433	402
Service cost	1	1	2
Interest cost	12	15	24
Plan participants’ contributions	16	18
Actuarial (gains) losses	(23)	(1)
Foreign currency exchange rate changes	(5)	2
Benefits paid (includes lump sum settlements)	(50)	(53)
Plan amendments and other	(66)	49
Acquisitions	3	0
Projected benefit obligation, ending	$ 321	$ 433	$ 402