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EMPLOYEE BENEFIT PLANS
 6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS
Components of net pension expense for defined benefit pension plans were as follows:
Three months ended June 30,Six months ended June 30,
(In millions)2024202320242023
Company-administered plans:
Service cost$1 $— $1 $— 
Interest cost21 23 43 45 
Expected return on plan assets(19)(19)(38)(38)
Amortization of net actuarial loss and prior service cost7 6 15 13 
Net pension expense$10 $10 $21 $20 
Company-administered plans:
U.S.$7 $7 $15 $15 
Non-U.S.3 3 6 5 
Net pension expense$10 $10 $21 $20 

Non-operating pension costs, net include the amortization of net actuarial loss and prior service cost, interest cost and expected return on plan assets components of pension and postretirement benefit costs, as well as any significant charges for settlements or curtailments if recognized. During the six months ended June 30, 2024, we did not contribute to our pension plans. We also maintain other postretirement benefit plans that are not reflected in the table above as the amount of postretirement benefit expense for such plans was not material for any period presented.