COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accrual For Environmental Loss Contingencies [RollForward]
Beginning of period	$ 595
Accruals for environmental matters deemed probable and reasonably estimable	57
Environmental liability payments	(23)
Other	1
End of period	630
Loss Contingency Classification of Accrual [Abstract]
Accrued liabilities		$ 226	$ 226
Other liabilities		404	369
Total environmental liabilities	$ 630	$ 630	$ 595