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Investment in Unconsolidated Affiliates Reconciliation of Equity in Earnings of Unconsolidated Affiliates (Tables)
 9 Months Ended
Sep. 30, 2015
Reconciliation of Equity in Earnings of Unconsolidated Affiliates [Line Items]  
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 three and nine months ended September 30, 2015 and 2014.
 
Three Months Ended
Nine Months Ended
 
September 30,
September 30,
Reconciliation of Equity in Earnings of Unconsolidated Affiliates
2015
2014
2015
2014
(In millions)
 
 
OGE's share of Enable Net Income (Loss)
$
(80.3
)
$
36.4

$
(35.9
)
$
111.1

Amortization of basis difference
3.5

3.4

10.6

10.4

Elimination of Enogex Holdings fair value and other adjustments
4.9

4.9

13.3

10.4

OGE's Equity in earnings of unconsolidated affiliates
$
(71.9
)
$
44.7

$
(12.0
)
$
131.9