v3.25.2
Retirement Benefits
 6 Months Ended
Jun. 30, 2025
Retirement Benefits [Abstract]  
Retirement Benefits Retirement Benefits
Components of Net Periodic Benefit (Credits) Costs
See Note 1 — Basis of Presentation of our 2024 Form 10-K for additional information on where we report the service cost and other non-service cost (credit) components for all plans.
The following tables present the components of our net periodic benefit (credit) cost for the three and six months ended June 30, 2025 and 2024. The amounts below are shown prior to capitalization and co-owner allocations, the effects of which were not material for any of the periods presented.
Pension BenefitsOPEBTotal Pension Benefits and OPEB
Three Months Ended June 30,202520242025202420252024
Components of net periodic benefit (credit) cost:
Service cost$21 $23 $5 $5 $26 $28 
Non-service components of pension benefits & OPEB (credit) cost:
Interest cost101 96 20 18 121 114 
Expected return on assets(123)(124)(8)(10)(131)(134)
Amortization of:
Prior service (credit) cost— — (1)(1)(1)(1)
Actuarial (gain) loss25 26 (2)(2)23 24 
Settlement charges— 1 — — — 1 
Non-service components of pension benefits & OPEB (credit) cost3 (1)9 5 12 4 
Net periodic benefit (credit) cost
$24 $22 $14 $10 $38 $32 
Pension BenefitsOPEBTotal Pension Benefits and OPEB
Six Months Ended June 30,202520242025202420252024
Components of net periodic benefit (credit) cost:
Service cost$42 $45 $9 $9 $51 $54 
Non-service components of pension benefits & OPEB (credit) cost:
Interest cost203 191 39 36 242 227 
Expected return on assets(245)(248)(16)(21)(261)(269)
Amortization of:
Prior service (credit) cost— — (3)(3)(3)(3)
Actuarial (gain) loss51 51 (4)(4)47 47 
Settlement charges— 4 — — — 4 
Non-service components of pension benefits & OPEB (credit) cost9 (2)16 8 25 6 
Net periodic benefit (credit) cost
$51 $43 $25 $17 $76 $60