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ENVIRONMENTAL MATTERS AND ASSET RETIREMENT OBLIGATIONS (Tables)

3 Months Ended

Mar. 31, 2020

Accrual for Environmental Loss Contingencies Disclosure [Abstract]

Schedule of environmental liabilities, current and non-current

(Dollars in millions)			March 31, 2020						December 31, 2019
Environmental contingent liabilities, current			$	20					$	20
Environmental contingent liabilities, long-term			265						267
Total			$	285					$	287

Schedule of changes to environmental remediation liabilities

Changes in the reserves for environmental remediation liabilities during first three months 2020 and full year 2019 are summarized below:

(Dollars in millions)			Environmental Remediation Liabilities
Balance at December 31, 2018			$	271
Changes in estimates recognized in earnings and other			4
Cash reductions			(15)
Balance at December 31, 2019			260
Changes in estimates recognized in earnings and other			2
Cash reductions			(4)
Balance at March 31, 2020			$	258

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Roll Forward Of Environmental Remediation Liabilities [Table Text Block]

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Schedule Of Environmental Liabilities Balance Sheet Line Items [Table Text Block]

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