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Compensation and Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2017
Pension Plans  
Pension and Other Postretirement Benefits  
Expense Components for Plans
Pension expense components for continuing operations are:
 
Edison International
 
SCE
 
Three months ended March 31,
(in millions)
2017
 
2016
 
2017
 
2016
Service cost
$
36

 
$
39

 
$
35

 
$
38

Interest cost
41

 
44

 
37

 
41

Expected return on plan assets
(53
)
 
(56
)
 
(50
)
 
(53
)
Amortization of prior service cost
1

 
1

 
1

 
1

Amortization of net loss1
5

 
9

 
4

 
8

Expense under accounting standards
$
30

 
$
37

 
$
27

 
$
35

Regulatory adjustment
(3
)
 
(9
)
 
(3
)
 
(9
)
Total expense recognized
$
27

 
$
28

 
$
24

 
$
26


1 
Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $3 million and $2 million, respectively, for the three months ended March 31, 2017, and $3 million and $2 million, respectively, for the three months ended March 31, 2016.
PBOP Plan  
Pension and Other Postretirement Benefits  
Expense Components for Plans
PBOP expense components for continuing operations are:
 
Edison International
 
SCE
 
Three months ended March 31,
(in millions)
2017
 
2016
 
2017
 
2016
Service cost
$
9

 
$
10

 
$
9

 
$
10

Interest cost
24

 
26

 
24

 
26

Expected return on plan assets
(27
)
 
(28
)
 
(27
)
 
(28
)
Amortization of prior service cost
(1
)
 
(1
)
 
(1
)
 
(1
)
Total expense
$
5

 
$
7

 
$
5

 
$
7