COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Accrual For Environmental Loss Contingencies [RollForward]
Beginning of period	$ 595
Accruals for environmental matters deemed probable and reasonably estimable	184
Environmental liability payments	(70)
Other	(6)
End of period	703
Loss Contingency Classification of Accrual [Abstract]
Accrued liabilities		$ 226	$ 226
Other liabilities		477	369
Total environmental liabilities	$ 703	$ 703	$ 595