COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Dec. 31, 2018
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning of period			$ 755
Accruals for environmental matters deemed probable and reasonably estimable			129
Environmental liability payments			(87)
Other			(3)
End of period	$ 794		794
Probable and reasonably estimable environmental liabilities, net of indemnities	39	$ 127	53	$ 184
Loss Contingency, Classification of Accrual [Abstract]
Accrued liabilities					$ 184	$ 175
Other liabilities					610	580
Total environmental liabilities	$ 794		794		$ 794	$ 755
Sale Of Legacy Remediated Property [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Probable and reasonably estimable environmental liabilities, net of indemnities			$ (43)