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Defined Severance Benefits (Tables)
 6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Costs
Net periodic benefit costs consist of the following:
Three Months Ended June 30,Six Months Ended June 30,
(in millions)
2026202520262025
Current service costs$60 $52 $120 $102 
Interest cost5 4 11 8 
Amortization of:
Net actuarial loss1 3 2 5 
Net periodic benefit cost$66 $59 $133 $115