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EMPLOYEE BENEFIT PLANS
 6 Months Ended
Jun. 30, 2025
Retirement Benefits [Abstract]  
EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS
Net periodic benefit costs for qualified pension plans include the following:
Three Months Ended June 30,Six Months Ended June 30,
(in millions)2025202420252024
Service cost$7 $7 $14 $14 
Pension expense included in Wages and benefits7 7 14 14 
Interest cost32 27 65 54 
Expected return on assets(37)(32)(74)(64)
Recognized actuarial loss3 4 6 9 
Pension expense included in Non-operating Income (Expense)$(2)$(1)$(3)$(1)