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Income Taxes Income Taxes (Tables)
12 Months Ended
Dec. 31, 2015
Income Taxes [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Income tax expense consists of the following (in millions):
 
Years Ended December 31,
  
2015
 
2014
 
2013
Current:
 
 
 
 
 
Federal
$
4

 
$
20

 
$
10

State and local
1

 
2

 

 
5

 
22

 
10

Deferred:
 
 
 
 
 
Federal
26

 
26

 
4

State and local
14

 
13

 
7

 
40

 
39

 
11

Income tax expense
$
45

 
$
61

 
$
21

 
 
 
 
 
 
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
The significant differences between the U.S. federal statutory rate and PGE’s effective tax rate for financial reporting purposes are as follows:
 
Years Ended December 31,
  
2015
 
2014
 
2013
Federal statutory tax rate
35.0
 %
 
35.0
 %
 
35.0
 %
Federal tax credits
(19.0
)
 
(11.4
)
 
(21.8
)
State and local taxes, net of federal tax benefit
4.2

 
3.9

 
3.4

Flow through depreciation and cost basis differences

 
(2.3
)
 
2.8

Other
0.5

 
0.8

 
(2.6
)
Effective tax rate
20.7
 %
 
26.0
 %
 
16.8
 %
 
 
 
 
 
 


Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Deferred income tax assets and liabilities consist of the following (in millions):
 
As of December 31,  
  
2015
 
2014
Deferred income tax assets:
 
 
 
Employee benefits
$
170

 
$
161

Price risk management
112

 
88

Regulatory liabilities
42

 
48

Tax credits
46

 
13

Other

 
1

Total deferred income tax assets
370

 
311

Deferred income tax liabilities:
 
 
 
Depreciation and amortization
781

 
693

Regulatory assets
220

 
210

Other
1

 

Total deferred income tax liabilities
1,002

 
903

Deferred income tax liability, net
$
(632
)
 
$
(592
)
Classification of net deferred income taxes:
 
 
 
Current deferred income tax asset (1)(2)
$

 
$
33

Noncurrent deferred income tax liability
(632
)
 
(625
)
 
$
(632
)
 
$
(592
)
 
 
 
 
 
(1) Included in Other current assets in the consolidated balance sheets.
(2) Current deferred income tax asset was not retrospectively restated for the adoption of ASU 2015-17, Balance Sheet Classification of Deferred Taxes. For additional information, see Note 2, Summary of Significant Accounting Policies.