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Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2025
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Product Warranty Liability The following is a summary of changes in the product warranty balances during the nine months ended September 30, 2025:
(Dollars in millions)
Balance at December 31, 2024$29 
Additional provision17 
Reversal and utilization(17)
Balance at September 30, 2025$29