COMMITMENTS AND CONTINGENCIES (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Environmental Matters [Abstract]
Beginning of period	$ 643	$ 654	$ 723
Accruals for environmental matters deemed probable and reasonably estimable	268	272	234
Environmental liability payments	(321)	(304)	(320)
Other	1	21	17
End of period	591	643	654
Loss Contingency Classification of Accrual [Abstract]
Accrued liabilities	278	304
Other liabilities	313	339
Total environmental liabilities	$ 591	$ 643	$ 654