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Defined Severance Benefits
 3 Months Ended
Mar. 31, 2024
Retirement Benefits [Abstract]  
Defined Severance Benefits Defined Severance Benefits
The following table provides the components of net periodic benefit costs and the portion of these costs charged to expense:
Three Months Ended March 31,
(in millions)
20242023
Current service costs$40 $35 
Interest cost4 3 
Amortization of:
Prior service credit— 1 
Net actuarial loss1 — 
Net periodic benefit cost$45 $39