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Income Taxes
 6 Months Ended
Jun. 30, 2019
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Effective Tax Rate
The table below provides a reconciliation of income tax expense computed at the federal statutory income tax rate to the income tax provision:
 
Three months ended June 30,
 
Six months ended June 30,
(in millions)
2019
 
2018
 
2019
 
2018
Edison International:
 
 
 
 
 
 
 
Income from continuing operations before income taxes
$
344

 
$
289

 
$
540

 
$
500

Provision for income tax at federal statutory rate of 21%
72

 
61

 
113

 
105

Increase in income tax from:
 

 
 
 
 

 
 
State tax, net of federal benefit
2

 
—

 
(5
)
 
(5
)
Property-related
(74
)
 
(69
)
 
(143
)
 
(138
)
Shared-based compensation
—

 
—

 
(2
)
 
—

2018 GRC Final Decision
(80
)
 
—

 
(80
)
 
—

Deferred tax re-measurement1
—

 
—

 
(69
)
 
—

Other
2

 
(1
)
 
(4
)
 
(2
)
Total income tax benefit from continuing operations
$
(78
)
 
$
(9
)
 
$
(190
)
 
$
(40
)
Effective tax rate
(22.7
)%
 
(3.1
)%
 
(35.2
)%
 
(8.0
)%
SCE:
 
 
 
 
 
 
 
Income from continuing operations before income taxes
$
381

 
$
325

 
$
599

 
$
635

Provision for income tax at federal statutory rate of 21%
80

 
68

 
126

 
133

Increase in income tax from:
 

 
 
 
 

 
 
State tax, net of federal benefit
3

 
3

 
(2
)
 
4

Property-related
(74
)
 
(69
)
 
(143
)
 
(138
)
Shared-based compensation
—

 
—

 
(2
)
 
—

2018 GRC Final Decision
(80
)
 
—

 
(80
)
 
—

Deferred tax re-measurement1
—

 
—

 
(69
)
 
—

Other
3

 
(4
)
 
(3
)
 
(7
)
Total income tax benefit from continuing operations
$
(68
)
 
$
(2
)
 
$
(173
)
 
$
(8
)
Effective tax rate
(17.8
)%
 
(0.6
)%
 
(28.9
)%
 
(1.3
)%

1 Relates to changes in the allocation of deferred tax re-measurement between customers and shareholders as a result of a CPUC resolution issued in February 2019. The resolution determined that customers are only entitled to excess deferred taxes which were included when setting rates, while other deferred tax re-measurement belongs to the shareholders.
The CPUC requires flow-through ratemaking treatment for the current tax benefit arising from certain property-related and other temporary differences which reverse over time. Flow-through items reduce current authorized revenue requirements in SCE's rate cases and result in a regulatory asset for recovery of deferred income taxes in future periods. The difference between the authorized amounts as determined in SCE's rate cases, adjusted for balancing and memorandum account activities, and the recorded flow-through items also result in increases or decreases in regulatory assets with a corresponding impact on the effective tax rate to the extent that recorded deferred amounts are expected to be recovered in future rates. For further information, see Note 11.
2018 GRC Final Decision
SCE recorded a tax benefit of $80 million related to the adoption of the 2018 GRC final decision primarily related to tax benefits on property-related items. This change primarily results from an updated estimate in the amount of excess deferred taxes returned to ratepayers for the year 2018.
Tax Disputes
Tax years that remain open for examination by the Internal Revenue Service ("IRS") and the California Franchise Tax Board are 2015 – 2017 and 2010 – 2017, respectively. Edison International has settled all open tax positions with the IRS for taxable years prior to 2013. 
In the fourth quarter of 2018, Edison International recorded the impacts of a settlement reached with the California Franchise Tax Board for tax years 1994 – 2006 that resulted in a $65 million refund of tax and interest. This refund was received in the second quarter of 2019. Tax years 2007 – 2009 are currently under protest with the California Franchise Tax Board.