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Benefit Plans
 9 Months Ended
Sep. 30, 2024
Retirement Benefits [Abstract]  
Benefit Plans Benefit Plans
The Company has several non-contributory defined benefit plans and postretirement benefit plans covering eligible employees and retirees.

The following tables present the components of net periodic (benefit) cost for the defined benefit plans:

Pension Benefits
Three Months EndedNine Months Ended
September 30,September 30,
2024202320242023
(In millions)
Service cost$1 $1 $2 $2 
Interest cost23 28 72 84 
Expected return on plan assets(29)(32)(88)(96)
Amortization of unrecognized net loss7 9 22 27 
Settlements4 47 4 48 
Net periodic cost$6 $53 $12 $65 

During the third quarter of 2023, the Company terminated a non-contributory defined benefit plan through lump sum settlement payments to certain participants and the transfer of the remaining liability to a third party insurance company through the purchase of group annuity contracts. The Company recorded a settlement expense of $47 million ($37 million after-tax) to recognize unrealized losses which were previously included in AOCI.

Other Postretirement Benefits
Three Months EndedNine Months Ended
September 30,September 30,
2024202320242023
(In millions)
Interest cost$1 $1 
Expected return on plan assets$(1)$(1)(2)(2)
Amortization of unrecognized net loss1 1 1 1 
Net periodic benefit$— $— $— $—