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EMPLOYEE BENEFIT PLANS
6 Months Ended
Jun. 30, 2023
Retirement Benefits [Abstract]  
EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANSNet periodic benefit costs for qualified defined-benefit plans include the following (in millions):
Three Months Ended June 30,Six Months Ended June 30,
 2023202220232022
Service cost$7 $11 $14 $22 
Pension expense included in Wages and benefits7 11 14 22 
Interest cost27 16 54 32 
Expected return on assets(29)(32)(57)(64)
Recognized actuarial loss6 12 
Pension expense included in Non-operating Income (Expense)$4 $(14)$9 $(28)