Related-Party Transactions (Tables)

12 Months Ended

Dec. 31, 2014

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 2014, 2013 and 2012.

	Year Ended December 31,
(In millions)	2014		2013		2012
Operating Revenues:
Electricity to power electric compression assets	$	13.3	$	10.2	$	12.4
Cost of Sales:
Natural gas transportation services	$	34.9	$	34.8	$	34.8
Natural gas storage services	4.4		12.9		12.9
Natural gas purchases	8.7		22.4		20.4