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EMPLOYEE BENEFIT PLANS (Tables)
3 Months Ended
Mar. 31, 2023
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs Net periodic benefit costs for qualified defined-benefit plans include the following (in millions):
Three Months Ended March 31,
 20232022
Service cost$7 $11 
Pension expense included in Wages and benefits7 11 
Interest cost27 16 
Expected return on assets(28)(32)
Recognized actuarial loss6 
Pension expense included in Non-operating Income (Expense)$5 $(14)