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ENVIRONMENTAL MATTERS (Tables)

12 Months Ended

Dec. 31, 2020

Environmental Matters [Abstract]

Schedule of Environmental Liabilities, Current and Non-current

(Dollars in millions)			December 31,
			2020						2019
Environmental contingencies, current			$	15					$	20
Environmental contingencies, long-term			270						267
Total			$	285					$	287

Schedule of Changes to Environmental Remediation Liabilities

(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			7
Cash reductions			(10)
Balance at December 31, 2020			$	257

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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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