Investment in Unconsolidated Affiliate and Related Party Transactions (Tables)

12 Months Ended

Dec. 31, 2014

Equity Method Investments and Joint Ventures [Abstract]

Related Party Transactions with Enable



	Year Ended
(In millions)	December 31, 2014		December 31, 2013
Operating Revenues:
Electricity to power electric compression assets	$	13.3	$	7.7
Cost of Sales:
Natural gas transportation services	$	34.9	$	23.2
Natural gas storage services	4.4		8.6
Natural gas purchases	8.7		14.8

Summarized Balance Sheet Financial Information, Equity Method Investment [Table Text Block]

Summarized unaudited financial information for 100 percent of Enable is presented below at December 31, 2014 and for the eight months ended December 31, 2013.



Balance Sheet	Year Ended December 31,
(In millions)	2014		2013
Current assets	$	438	$	549
Non-current assets	11,399		10,683
Current liabilities	671		720
Non-current liabilities	2,344		2,331

Summarized Income Statement Financial Information, Equity Method Investment [Table Text Block]



Income Statement	Year Ended December 31,
(In millions)	2014		2013
Operating revenues	$	3,367	$	2,123
Cost of sales	1,914		1,241
Operating income	586		322
Net income attributable to Enable	530		289

Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Table Text Block]

The following table reconciles OGE Energy's equity in earnings of its unconsolidated affiliates for the years ended December 31, 2014 and 2013.



	Year Ended December 31,
(In millions)	2014		2013
OGE's share of Enable Net Income	$	143.1	$	82.1
Amortization of basis difference	14.0		9.4
Elimination of Enogex Holdings fair value and other adjustments	15.5		10.4
OGE's Equity in earnings of unconsolidated affiliates	$	172.6	$	101.9