v3.26.1
Employee Benefit Plans (Tables)
6 Months Ended
Jun. 30, 2026
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Benefit Costs
Pension Benefits Cost
Second QuartersSix Months
(Dollars in Millions)
2026202520262025
Service Cost Included in Labor and Fringe$5 $$11 $10 
Interest Cost25 28 50 55 
Expected Return on Plan Assets(37)(40)(74)(80)
Amortization of Net Loss6 12 11 
Total Included in Other Income - Net(6)(7)(12)(14)
Net Periodic Benefit Credit$(1)$(2)$(1)$(4)