Investment in Unconsolidated Affiliates Reconciliation of Equity in Earnings of Unconsolidated Affiliates (Tables)

6 Months Ended

Jun. 30, 2014

Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Line Items]

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

	Three Months Ended				Six Months Ended
Reconciliation of Equity in Earnings of Unconsolidated Affiliates	June 30, 2014		June 30, 2013		June 30, 2014		June 30, 2013
(In millions)
OGE's share of Enable Net Income	$	32.2	$	18.5	$	74.7	$	18.5
Amortization of basis difference	3.4		—		7.0		—
Elimination of Enogex Holdings fair value and other adjustments	3.7		—		5.5		—
OGE's Equity in earnings of unconsolidated affiliates	$	39.3	$	18.5	$	87.2	$	18.5