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Compensation and Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2016
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)
2016
 
2015
 
2016
 
2015
Service cost
$
39

 
$
35

 
$
38

 
$
35

Interest cost
44

 
41

 
41

 
38

Expected return on plan assets
(56
)
 
(57
)
 
(53
)
 
(53
)
Amortization of prior service cost
1

 
1

 
1

 
1

Amortization of net loss1
9

 
9

 
8

 
7

Expense under accounting standards
$
37

 
$
29

 
$
35

 
$
28

Regulatory adjustment
(9
)
 
(1
)
 
(9
)
 
(1
)
Total expense recognized
$
28

 
$
28

 
$
26

 
$
27


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, 2016, and $3 million and $2 million, respectively, for the three months ended March 31, 2015.
Postretirement Benefits Other Than Pensions  
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)
2016
 
2015
 
2016
 
2015
Service cost
$
10

 
$
12

 
$
10

 
$
12

Interest cost
26

 
29

 
26

 
28

Expected return on plan assets
(28
)
 
(28
)
 
(28
)
 
(28
)
Amortization of prior service cost
(1
)
 
(3
)
 
(1
)
 
(3
)
Amortization of net loss
—

 
6

 
—

 
6

Total expense
$
7

 
$
16

 
$
7

 
$
15
Southern California Edison  
Workforce Reductions [Abstract]  
Workforce reductions
The following table provides a summary of changes in the accrued severance liability associated with these reductions:
(in millions)
 
 
Balance at January 1, 2016
 
$
22

Additions
 
5

Payments
 
(15
)
Balance at March 31, 2016
 
$
12