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Other Expense, Net (Tables)
12 Months Ended
Dec. 31, 2021
Other Income and Expenses [Abstract]  
Schedule of Other Operating Cost and Expense
Year Ended December 31,
202120202019
(Dollars in millions)
Indemnification related — post Spin-Off$— $41 $28 
Indemnification related — litigation— 11 
Environmental remediation, non-active sites— — 
Factoring and notes receivables discount fees
$$46 $40