CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Net income	$ 187.3	$ 215.2	$ 337.4	$ 336.2
Pension Plan and Restoration of Retirement Income Plan:
Amortization of deferred net loss, net of tax of $0.3, $0.6, $0.9 and $1.8, respectively	0.5	0.9	1.4	2.8
Postretirement Benefit Plans:
Other Comprehensive Income Reclassification Of Defined Benefit Postretirement Plans Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax	0.1	0.6	0.6	1.6
Amortization of prior service cost, net of tax of ($0.2), ($0.3), ($0.8) and ($0.8), respectively	(0.4)	(0.5)	(1.3)	(1.4)
Deferred commodity contracts hedging losses reclassified in net income, net of tax of $0, $0.3, $0 and $0.2, respectively	0	0.3	0	0.2
Amortization of deferred interest rate swap hedging losses, net of tax of $0, $0, $0.1 and $0.1, respectively	0.1	0.1	0.2	0.2
Other comprehensive income, net of tax	0.3	1.4	0.9	3.4
Comprehensive income	187.6	216.6	338.3	339.6
Less: Comprehensive income attributable to noncontrolling interests	0	0	0	6.3
Less: Deconsolidation of Enogex Holdings	0	0	0	6.1
Total comprehensive income attributable to OGE Energy	$ 187.6	$ 216.6	$ 338.3	$ 327.2