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Compensation and Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2017
Pension Plans  
Pension and Other Postretirement Benefits  
Expense Components for Plans
Pension expense components for continuing operations are:
 
Three months ended June 30,
 
Six months ended June 30,
(in millions)
2017
 
2016
 
2017
 
2016
Edison International:
 
 
 
 
 
 
 
Service cost
$
36

 
$
39

 
$
72

 
$
78

Interest cost
41

 
44

 
82

 
88

Expected return on plan assets
(53
)
 
(56
)
 
(106
)
 
(112
)
Settlement costs1
8

 
—

 
8

 
—

Amortization of prior service cost
1

 
1

 
2

 
2

Amortization of net loss2
5

 
9

 
10

 
18

Expense under accounting standards
$
38

 
$
37

 
$
68

 
$
74

Regulatory adjustment
(3
)
 
(9
)
 
(6
)
 
(18
)
Total expense recognized
$
35

 
$
28

 
$
62

 
$
56

SCE:
 
 
 
 
 
 
 
Service cost
$
35

 
$
38

 
$
70

 
$
76

Interest cost
37

 
41

 
74

 
82

Expected return on plan assets
(50
)
 
(53
)
 
(100
)
 
(106
)
Amortization of prior service cost
1

 
1

 
2

 
2

Amortization of net loss2
4

 
8

 
8

 
16

Expense under accounting standards
$
27

 
$
35

 
$
54

 
$
70

Regulatory adjustment
(3
)
 
(9
)
 
(6
)
 
(18
)
Total expense recognized
$
24


$
26


$
48


$
52


1 
Under GAAP, a settlement is recorded when lump-sum payments exceed estimated annual service and interest costs. Lump sum payments made in April 2017 to Edison International executives retiring in 2016 from the Executive Retirement Plan exceeded the estimated service and interest costs, resulting in a partial settlement of that plan. A settlement loss of approximately $7.7 million ($4.6 million after tax) was recorded at Edison International in the second quarter of 2017.
2 
Includes the amount of net loss reclassified from other comprehensive loss. The amount reclassified for Edison International and SCE was $2 million and $1 million, respectively, for the three months ended June 30, 2017, and $5 million and $3 million, respectively, for the six months ended June 30, 2017. The amount reclassified for Edison International and SCE was $3 million and $1 million, respectively, for the three months ended June 30, 2016, and $6 million and $3 million, respectively, for the six months ended June 30, 2016.
PBOP Plan  
Pension and Other Postretirement Benefits  
Expense Components for Plans
PBOP expense components for continuing operations are:
 
Three months ended June 30,
 
Six months ended June 30,
(in millions)
2017
 
2016
 
2017
 
2016
Edison International:
 
 
 
 
 
 
 
Service cost
$
9

 
$
10

 
$
18

 
$
20

Interest cost
24

 
26

 
48

 
52

Expected return on plan assets
(27
)
 
(28
)
 
(54
)
 
(56
)
Amortization of prior service cost
(1
)
 
(1
)
 
(2
)
 
(2
)
Total expense
$
5

 
$
7

 
$
10

 
$
14

SCE:
 
 
 
 
 
 
 
Service cost
$
9

 
$
10

 
$
18

 
$
20

Interest cost
24

 
26

 
48

 
52

Expected return on plan assets
(27
)
 
(28
)
 
(54
)
 
(56
)
Amortization of prior service cost
(1
)
 
(1
)
 
(2
)
 
(2
)
Total expense
$
5

 
$
7

 
$
10

 
$
14