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Related Party Transactions
 9 Months Ended
Sep. 30, 2013
Related Party Transaction [Line Items]  
Related Party Transactions Disclosure [Text Block]
Related Party Transactions
 
OGE Energy charged operating costs to OG&E of $28.7 million and $28.8 million during the three months ended September 30, 2013 and 2012, respectively, and $87.2 million and $89.0 million during the nine months ended September 30, 2013 and 2012, respectively. OGE Energy charges operating costs to its subsidiaries and unconsolidated affiliates based on several factors. Operating costs directly related to specific subsidiaries and unconsolidated affiliates are assigned to those subsidiaries and unconsolidated affiliates.  Where more than one subsidiary or unconsolidated affiliate benefits from certain expenditures, the costs are shared between those subsidiaries and unconsolidated affiliates receiving the benefits.  Operating costs incurred for the benefit of all subsidiaries and unconsolidated affiliates are allocated among the subsidiaries and unconsolidated affiliates, either as overhead based primarily on labor costs or using the "Distrigas" method.  The Distrigas method is a three-factor formula that uses an equal weighting of payroll, net operating revenues and gross property, plant and equipment.  OGE Energy adopted the Distrigas method in January 1996 as a result of a recommendation by the OCC Staff.  OGE Energy believes this method provides a reasonable basis for allocating common expenses.

The following table summarizes related party transactions between OG&E and its affiliate, Enable, during the three and nine months ended September 30, 2013 and 2012.
 
Three Months Ended
Nine Months Ended
 
September 30,
September 30,
(In millions)
2013
2012
2013
2012
Operating Revenues:
 
 
 
 
Electricity to power electric compression assets
$
3.9

$
4.6

$
7.8

$
10.3

Cost of Goods Sold:
 
 
 
 
Natural gas transportation services
$
8.7

$
8.7

$
26.1

$
26.1

Natural gas storage services
3.2

3.2

9.7

9.6

Natural gas purchases (A)
9.5

8.7

19.5

18.3

(A)
At September 30, 2013 and December 31, 2012, respectively, there were $1.4 million and $1.0 million of natural gas purchases recorded for these activities.

During the nine months ended September 30, 2013 and 2012, OG&E declared dividends to OGE Energy of $120 million and $75 million, respectively.