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Related-Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2013
Related Party Transaction [Line Items]  
Schedule of Related Party Transactions [Table Text Block]
The following table summarizes related party transactions between OG&E and its affiliate, Enable, during 2013, 2012 and 2011.
 
December 31,
(In millions)
2013
2012
2011
Operating Revenues:
 
 
 
Electricity to power electric compression assets
$
10.2

$
12.4

$
8.1

Cost of Sales:
 
 
 
Natural gas transportation services
$
34.8

$
34.8

$
34.8

Natural gas storage services
12.9

12.9

12.7

Natural gas purchases
22.4

20.4

34.7