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ENVIRONMENTAL MATTERS AND ASSET RETIREMENT OBLIGATIONS (Tables)
9 Months Ended
Sep. 30, 2023
Accrual for Environmental Loss Contingencies Disclosure [Abstract]  
Schedule of environmental liabilities, current and non-current
(Dollars in millions)September 30, 2023December 31, 2022
Environmental contingencies, current$10 $10 
Environmental contingencies, long-term276 264 
Total$286 $274 
Schedule of changes to environmental remediation liabilities Changes in the reserves for environmental remediation liabilities during first nine months 2023 and full year 2022 are summarized below:
(Dollars in millions)Environmental Remediation Liabilities
Balance at December 31, 2021$253 
Changes in estimates recognized in earnings and other
Cash reductions(14)
Balance at December 31, 2022245 
Changes in estimates recognized in earnings and other19 
Cash reductions(9)
Balance at September 30, 2023$255