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Compensation and Benefit Plans
9 Months Ended
Sep. 30, 2020
Retirement Benefits [Abstract]  
Compensation and Benefit Plans Compensation and Benefit Plans
Pension Plans
Net periodic pension expense components are:
 Three months ended September 30,Nine months ended September 30,
(in millions)2020201920202019
Edison International:
Service cost$31 $31 $93 $95 
Non-service cost (benefit)
Interest cost31 38 92 116 
Expected return on plan assets(55)(52)(163)(156)
Amortization of prior service cost— — 
Amortization of net loss1
Regulatory adjustment(4)(12)
Total non-service benefit2
$(19)$(16)$(55)$(45)
Total expense recognized$12 $15 $38 $50 
SCE:
Service cost$31 $31 $91 $93 
Non-service cost (benefit)
Interest cost29 35 85 106 
Expected return on plan assets(51)(48)(153)(146)
Amortization of prior service cost— — 
Amortization of net loss1
Regulatory adjustment(4)(12)
Total non-service benefit2
$(18)$(16)$(55)$(47)
Total expense recognized$13 $15 $36 $46 
1 Represents the amount of net loss reclassified from other comprehensive loss.
2    Included in "Other income" on Edison International's and SCE's consolidated statement of income.
Postretirement Benefits Other Than Pensions ("PBOP")
Net periodic PBOP expense components for Edison International and SCE are:
 Three months ended September 30,Nine months ended September 30,
(in millions)2020201920202019
Service cost$10 $$28 $24 
Non-service cost (benefit)
Interest cost17 21 51 63 
Expected return on plan assets(29)(28)(89)(84)
Amortization of prior service cost(1)(1)(1)(1)
  Amortization of net gain(5)— (13)(2)
Regulatory adjustment24 17 
Total non-service benefit1
$(10)$(3)$(28)$(7)
Total expense$— $$— $17 
1     Included in "Other income" on Edison International's and SCE's consolidated statement of income.