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Equity (Notes)
 9 Months Ended
Sep. 30, 2012
Stockholders' Equity Note [Abstract]  
Equity
EQUITY

The activity in equity during the nine month periods ended September 30, 2012 and 2011 is as follows (dollars in millions):

 
Portland General Electric Company Shareholders’ Equity
 
 
 
 
 
 
Accumulated
Other
Comprehensive
Loss
 
Retained
Earnings
 
 
Noncontrolling
Interests’
Equity
 
Common Stock
 
 
 
 
 
Shares
 
Amount
 
 
 
 
Balances as of December 31, 2011
75,362,956

 
$
836

 
$
(6
)
 
$
833

 
 
$
3

Issuance of shares pursuant to equity-based plans
171,430

 
—

 
—

 
—

 
 
—

Stock-based compensation
—

 
2

 
—

 
—

 
 
—

Dividends declared
—

 
—

 
—

 
(61
)
 
 
—

Net income (loss)
—

 
—

 
—

 
113

 
 
(1
)
Balances as of September 30, 2012
75,534,386

 
$
838

 
$
(6
)
 
$
885

 
 
$
2

 
 
 
 
 
 
 
 
 
 
 
Balances as of December 31, 2010
75,316,419

 
$
831

 
$
(5
)
 
$
766

 
 
$
7

Issuance of shares pursuant to equity-based plans
28,932

 
—

 
—

 
—

 
 
—

Stock-based compensation
—

 
2

 
—

 
—

 
 
—

Dividends declared
—

 
—

 
—

 
(59
)
 
 
—

Noncontrolling interests’ capital distributions
—

 
—

 
—

 
—

 
 
(4
)
Net income
—

 
—

 
—

 
118

 
 
—

Balances as of September 30, 2011
75,345,351

 
$
833

 
$
(5
)
 
$
825

 
 
$
3