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Compensation and Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2025
Pension Plan  
Pension and Other Postretirement Benefits  
Summary of expense components for plans
Pension Plans
Net periodic pension expense components are:
Three months ended March 31,
(in millions)20252024
Edison International:
Service cost$23 $24 
Non-service cost (benefit)
Interest cost48 44 
Expected return on plan assets(58)(59)
Amortization of net loss1
— 1 
Regulatory adjustment(7)(5)
Total non-service benefit2
$(17)$(19)
Total expense$6 $5 
SCE:
Service cost$23 $24 
Non-service cost (benefit)
Interest cost44 40 
Expected return on plan assets(55)(55)
Amortization of net loss1
— 1 
Regulatory adjustment(7)(5)
Total non-service benefit2
$(18)$(19)
Total expense$5 $5 
1Represents the amount of net loss reclassified from other comprehensive loss.
2Included in "Other Income, net" on Edison International's and SCE's condensed consolidated statements of income.
Postretirement Benefits Other Than Pensions  
Pension and Other Postretirement Benefits  
Summary of expense components for plans
Postretirement Benefits Other Than Pensions ("PBOP")
Net periodic PBOP expense components for Edison International and SCE are:
Three months ended March 31,
(in millions)20252024
Service cost$3 $3 
Non-service cost (benefit)
Interest cost10 9 
Expected return on plan assets(27)(28)
Amortization of net gain(20)(24)
Regulatory adjustment34 40 
Total non-service benefit1
$(3)$(3)
Total expense$— $— 
1Included in "Other income, net" on Edison International's and SCE's condensed consolidated statements of income.