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Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract]  
Summary Information Concerning our Recorded Obligations for Product Warranties and Product Performance Guarantees The following table summarizes information concerning our recorded obligations for product warranties and product performance guarantees.
 
Year Ended December 31,
 20242023
(Dollars in millions)
Warranty and product performance guarantees at beginning of year$27 $28 
Accruals for warranties/guarantees issued during the year10 13 
Settlement of warranty/guarantee claims(13)(14)
Foreign currency translation(1)— 
Warranty and product performance guarantees at end of year$23 $27