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Compensation and Benefit Plans (Tables)
 9 Months Ended
Sep. 30, 2015
Pension Plans  
Pension and Other Postretirement Benefits  
Expense Components for Plans
Pension expense components for continuing operations are:
 
Three months ended September 30,
 
Nine months ended September 30,
(in millions)
2015
 
2014
 
2015
 
2014
Edison International:
 
 
 
 
 
 
 
Service cost
$
35

 
$
30

 
$
105

 
$
89

Interest cost
41

 
48

 
124

 
141

Expected return on plan assets
(57
)
 
(61
)
 
(171
)
 
(178
)
Settlement costs1
—

 
35

 
—

 
35

Amortization of prior service cost
1

 
1

 
3

 
4

Amortization of net loss2
9

 
1

 
27

 
3

Expense under accounting standards
$
29

 
$
54

 
$
88

 
$
94

Regulatory adjustment
(1
)
 
(2
)
 
(4
)
 
59

Total expense recognized
$
28

 
$
52

 
$
84

 
$
153

SCE:
 
 
 
 
 
 
 
Service cost
$
35

 
$
29

 
$
104

 
$
87

Interest cost
38

 
44

 
113

 
132

Expected return on plan assets
(53
)
 
(56
)
 
(160
)
 
(168
)
Settlement costs1
—

 
33

 
—

 
33

Amortization of prior service cost
1

 
1

 
4

 
3

Amortization of net loss2
7

 
—

 
22

 
1

Expense under accounting standards
$
28

 
$
51

 
$
83

 
$
88

Regulatory adjustment
(2
)
 
(2
)
 
(4
)
 
59

Total expense recognized
$
26

 
$
49

 
$
79

 
$
147


1 
For the three and nine months ended September 30, 2014, this relates to lump-sum amounts made to employees who retired from the SCE Retirement Plan (primarily due to workforce reductions). Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International was $2 million for both the three and nine months ended September 30, 2014.
2 
Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $4 million and $2 million, respectively, for the three months ended September 30, 2015, and $11 million and $6 million, respectively, for the nine months ended September 30, 2015. The amount reclassified for Edison International and SCE was $2 million and $1 million, respectively, for the three months ended September 30, 2014 and $5 million and $3 million, respectively, for the nine months ended September 30, 2014.
Postretirement Benefits Other Than Pensions  
Pension and Other Postretirement Benefits  
Expense Components for Plans
PBOP expense components for continuing operations are:
 
Three months ended September 30,
 
Nine months ended September 30,
(in millions)
2015
 
2014
 
2015
 
2014
Edison International:
 
 
 
 
 
 
 
Service cost
$
12

 
$
10

 
$
36

 
$
32

Interest cost
29

 
28

 
86

 
82

Expected return on plan assets
(28
)
 
(28
)
 
(85
)
 
(84
)
Amortization of prior service cost
(3
)
 
(9
)
 
(9
)
 
(27
)
Amortization of net loss
5

 
—

 
17

 
—

Total expense
$
15

 
$
1

 
$
45

 
$
3

SCE:
 
 
 
 
 
 
 
Service cost
$
12

 
$
10

 
$
36

 
$
32

Interest cost
28

 
27

 
84

 
81

Expected return on plan assets
(28
)
 
(28
)
 
(84
)
 
(84
)
Amortization of prior service cost
(3
)
 
(9
)
 
(9
)
 
(27
)
Amortization of net loss
6

 
—

 
17

 
—

Total expense
$
15

 
$
—

 
$
44

 
$
2
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, 2015
 
$
35

Additions
 
17

Payments
 
(31
)
Balance at September 30, 2015
 
$
21