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Income Taxes (Tables)
 3 Months Ended
Mar. 31, 2017
Income Tax Disclosure [Abstract]  
Reconciliation of Income Tax Expense
The table below provides a reconciliation of income tax expense computed at the federal statutory income tax rate to the income tax provision:
 
Edison International
 
SCE
 
Three months ended March 31,
(in millions)
2017
 
2016
 
2017
 
2016
Income from continuing operations before income taxes
$
352

 
$
333

 
$
392

 
$
367

Provision for income tax at federal statutory rate of 35%
124

 
117

 
137

 
128

Increase in income tax from:
 
 
 
 
 
 
 
State tax, net of federal benefit
10

 
6

 
13

 
9

Property-related
(113
)
 
(79
)
 
(113
)
 
(79
)
Change related to uncertain tax positions
(12
)
 
(1
)
 
(11
)
 
(1
)
Shared-based compensation1
(43
)
 
(10
)
 
(8
)
 
(8
)
Other
(6
)
 
(5
)
 
(6
)
 
(7
)
Total income tax (benefit) expense from continuing operations
$
(40
)
 
$
28

 
$
12

 
$
42

Effective tax rate
(11.4
)%
 
8.4
%
 
3.1
%
 
11.4
%
1  
Includes state taxes for Edison International and SCE of $6 million and $1 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. Refer to Note 1 for further information.
Reconciliation of Unrecognized Tax Benefits
 The following table provides a reconciliation of unrecognized tax benefits for 2017 as a result of the audit settlement:
(in millions)
Edison International
 
SCE
Balance at January 1, 2017
$
471

 
$
371

Tax positions taken during the current year:
 
 
 
   Increases
10

 
10

Tax positions taken during a prior year:
 
 
 
   Increases
2

 
2

   Decreases
(10
)
 
(10
)
   Decreases for settlements during the period
(82
)
 
(78
)
Balance at March 31, 2017
$
391

 
$
295