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ENVIRONMENTAL MATTERS AND ASSET RETIREMENT OBLIGATIONS (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning of period	$ 287
End of period	287	$ 287
Accrual for Environmental Loss Contingencies, Balance Sheet Classification [Abstract]
Accrued Environmental Loss Contingencies, Current	15	20
Accrued Environmental Loss Contingencies, Noncurrent	272	267
Environmental Remediation [Member]
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning of period	260	271
Changes in estimates recognized in earnings and other	6	4
Cash reductions	(7)	(15)
End of period	$ 259	260
Expected Payment Period of Environmental Contingencies	approximately 30 years
Environmental Remediation [Member] | Minimum [Member]
Site Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 259	260
Environmental Remediation [Member] | Maximum [Member]
Site Contingency [Line Items]
Loss Contingency, Estimate of Possible Loss	493	487
Environmental ARO [Member]
Site Contingency [Line Items]
Best Estimate Accrued to-date For Asset Retirement Obligation	28	27
Non Environmental ARO [Member]
Site Contingency [Line Items]
Best Estimate Accrued to-date For Asset Retirement Obligation	$ 49	$ 48

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Amount of expense (reversal of expense) which increases (decreases) the accrual for environmental loss contingencies from revisions in estimates to existing obligations. Excludes changes related to business acquisitions, divestitures, or currency movement.

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