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Basis of Presentation (Tables)
9 Months Ended
Sep. 30, 2024
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Reconciliation of cash, cash equivalents and restricted cash The following table provides a reconciliation of Cash and cash equivalents and restricted cash reported in the Consolidated Balance Sheet to the total of the amounts in the Consolidated Statement of Cash Flows.
September 30, 2024December 31, 2023
(Dollars in millions)  
Cash and cash equivalents$451 $236 
Restricted cash included in Other current assets21 34 
Cash, cash equivalents and restricted cash in the statement of cash flows$472 $270