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Commitments (Tables)
 3 Months Ended
Mar. 31, 2024
Commitments and Contingencies Disclosure [Abstract]  
Changes in warranty liabilities
Changes in the company’s warranty liability for standard warranties, which are included in other accrued expenses and liabilities and other liabilities in the Consolidated Balance Sheet, and for extended warranty contracts, which are included in deferred income in the Consolidated Balance Sheet, are presented in the following tables.
Standard Warranty Liability
(Dollars in millions)20242023
Balance at January 1$65 $79 
Current-period accruals17 17 
Accrual adjustments to reflect actual experience7 (17)
Charges incurred(20)(21)
Balance at March 31$69 $58 
Extended Warranty Liability
(Dollars in millions)20242023
Balance at January 1$184 $272 
Revenue deferred for new extended warranty contracts5 9 
Amortization of deferred revenue(32)(37)
Other (1)
(3)1 
Balance at March 31$154 $244 
Current portion$94 $129 
Noncurrent portion$60 $116 
(1)Other primarily consists of foreign currency translation adjustments.