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Compensation and Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2019
Pension Plans  
Defined Benefit Plan Disclosure [Line Items]  
Expense Components for Plans
Net periodic pension expense components for continuing operations are:
 
Edison International
 
SCE
 
Three months ended March 31,
(in millions)
2019
 
2018
 
2019
 
2018
Service cost
$
32

 
$
32

 
$
31

 
$
31

Non-service cost
 
 
 
 
 
 
 
Interest cost
39

 
35

 
35

 
32

Expected return on plan assets
(52
)
 
(57
)
 
(49
)
 
(53
)
Amortization of prior service cost
—

 
1

 
—

 
1

Amortization of net loss1
2

 
2

 
1

 
1

Regulatory adjustment (deferred)
(4
)
 
2

 
(4
)
 
2

Total non-service benefit2
$
(15
)
 
$
(17
)
 
$
(17
)
 
$
(17
)
Total expense recognized
$
17

 
$
15

 
$
14

 
$
14


1 
Includes net loss reclassified from other comprehensive loss of $2 million and $1 million for Edison International and SCE, respectively, for both the three months ended March 31, 2019 and 2018.
2 Included in "Other income and expenses" on Edison International's and SCE's consolidated statement of income.
PBOP Plan  
Defined Benefit Plan Disclosure [Line Items]  
Expense Components for Plans
Net periodic PBOP expense components for continuing operations are:
 
Edison International
 
SCE
 
Three months ended March 31,
(in millions)
2019
 
2018
 
2019
 
2018
Service cost
$
8

 
$
9

 
$
8

 
$
9

Non-service cost
 
 
 
 
 
 
 
Interest cost
21

 
21

 
21

 
21

Expected return on plan assets
(28
)
 
(30
)
 
(28
)
 
(30
)
   Amortization of net gain
(1
)
 
—

 
(1
)
 
—

 Regulatory adjustment (deferred)
6

 
—

 
6

 
—

Total non-service benefit1
$
(2
)
 
$
(9
)
 
$
(2
)
 
$
(9
)
Total expense
$
6

 
$
—

 
$
6

 
$
—


1 Included in "Other income and expenses" on Edison International's and SCE's consolidated statement of income.