Investment in Unconsolidated Affiliates (Tables)

3 Months Ended

Mar. 31, 2017

Reconciliation of Basis Difference [Line Items]

Reconciliation of Basis Difference [Table Text Block]

The following table reconciles the basis difference in Enable from December 31, 2016 to March 31, 2017.



(In millions)
Basis difference as of December 31, 2016	$	743.7
Amortization of basis difference	(2.8		)
Elimination of Enable fair value step up	(4.3		)
Basis difference as of March 31, 2017	$	736.6

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

The following table reconciles the Company's equity in earnings of its unconsolidated affiliates for the three months ended March 31, 2017 and 2016.



	Three Months Ended
	March 31,
Reconciliation of Equity in Earnings of Unconsolidated Affiliates	2017			2016
(In millions)
Enable net income	$	110.8		$	86.0
Differences due to timing of OGE Energy and Enable accounting close	—			(11.7		)
Enable net income used to calculate OGE Energy's equity in earnings	$	110.8		$	74.3
OGE Energy’s percent ownership at period end	25.7		%	26.3		%
OGE Energy’s portion of Enable net income	$	28.5		$	19.5
Impairments recognized by Enable associated with OGE Energy’s basis differences	—			1.8
OGE Energy's share of Enable net income	$	28.5		$	21.3
Amortization of basis difference	2.8			2.9
Elimination of Enable fair value step up	4.3			4.1
Equity in earnings of unconsolidated affiliates	$	35.6		$	28.3

The following table summarizes related party transactions between OG&E and Enable during the three months ended March 31, 2017 and 2016.



	Three Months Ended
	March 31,
(In millions)	2017			2016
Operating Revenues:
Electricity to power electric compression assets	$	2.2		$	2.3
Cost of Sales:
Natural gas transportation services	$	8.8		$	8.8
Natural gas purchases/(sales)	(0.4		)	1.5

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

Summarized unaudited financial information for 100 percent of Enable is presented below at March 31, 2017 and December 31, 2016 and for the three months ended March 31, 2017 and 2016.



	March 31,		December 31,
Balance Sheet	2017		2016
(In millions)
Current assets	$	375	$	396
Non-current assets	10,786		10,816
Current liabilities	279		362
Non-current liabilities	3,111		3,056

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



	Three Months Ended
	March 31,
Income Statement	2017		2016
(In millions)
Operating revenues	$	666	$	509
Cost of natural gas and natural gas liquids	308		195
Operating income	140		103
Net income	111		86