COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning of period	$ 709
Accruals for environmental matters deemed probable and reasonably estimable	127
Environmental liability payments	(166)
Other	(4)
End of period	666
Loss Contingency, Classification of Accrual [Abstract]
Accrued liabilities		$ 222	$ 222
Other liabilities		444	487
Total environmental liabilities	$ 666	$ 666	$ 709