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Accumulated Other Comprehensive Income (Loss)
9 Months Ended
Sep. 30, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] 
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
 
The following table summarizes the components of accumulated other comprehensive loss at September 30, 2011 and December 31, 2010 attributable to OGE Energy.  At both September 30, 2011 and December 31, 2010, there was no accumulated other comprehensive loss related to Enogex's noncontrolling interest in Atoka.
 
September 30,
 
December 31,
(In millions)
2011
 
2010
Pension Plan and Restoration of Retirement Income Plan:
 
 
 
Net loss                                                                                              
$
(29.4
)
 
$
(31.1
)
Prior service cost                                                                                              
(0.2
)
 
(0.5
)
Postretirement plans:
 
 
 

Net loss                                                                                              
(12.3
)
 
(13.6
)
Prior service cost                                                                                              
9.3

 
—

Net transition obligation                                                                                              
(0.2
)
 
(0.3
)
Deferred commodity contracts hedging losses                                                                                                 
(5.6
)
 
(19.5
)
Deferred interest rate swaps hedging losses                                                                                                  
(0.8
)
 
(1.0
)
Total accumulated other comprehensive loss                                                                                            
(39.2
)
 
(66.0
)
Less:  Accumulated other comprehensive loss attributable to noncontrolling interests
(3.7
)
 
(5.8
)
Accumulated other comprehensive loss, net of tax
$
(35.5
)
 
$
(60.2
)