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RETIREMENT PLANS (Tables)
3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Components of net periodic benefit cost
Components of net periodic benefit (credit) cost were as follows:
First Quarter
 Pension PlansOther Postretirement Benefit Plans
2024202320242023
(Dollars in millions)U.S.Non-U.S.U.S.Non-U.S.
Service cost$$$$$— $— 
Interest cost18 19 
Expected return on assets(24)(7)(22)(6)(1)(1)
Amortization of:
Prior service credit, net— — — — (3)(7)
Net periodic benefit (credit) cost$(1)$$$$$(1)