COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning of period	$ 709
Accruals for environmental matters deemed probable and reasonably estimable	42
Environmental liability payments	(34)
Other	(2)
End of period	715
Loss Contingency, Classification of Accrual [Abstract]
Accrued liabilities		$ 222	$ 222
Other liabilities		493	487
Total environmental liabilities	$ 715	$ 715	$ 709