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Nature of Operations and Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Proceeds and Gains from Sale of Property Rights Amounts related to the nine months 2022 and 2021 are summarized in the following table.
Nine Months
(Dollars in millions)20222021
Gains$142 $349 
Proceeds—200