CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income	$ 93.0	$ 101.6	$ 121.0	$ 149.1
Pension Plan and Restoration of Retirement Income Plan:
Amortization of deferred net loss, net of tax of $0.8, $0.5, $1.2 and $0.9, respectively	1.0	0.7	1.9	1.5
Amortization of prior service cost, net of tax of $0.1, $0.1, $0.1 and $0.1, respectively	0	0.1	0	0.1
Postretirement Benefit Plans:
Amortization of deferred net loss, net of tax of $0.3, $0.3, $0.6 and $0.6, respectively	0.5	0.5	1.0	1.0
Amortization of prior service cost, net of tax of ($0.2), ($0.2), ($0.5) and ($0.5), respectively	(0.4)	(0.4)	(0.9)	(0.9)
Deferred commodity contracts hedging gains reclassified in net income, net of tax of $0, $0, ($0.1) and ($1.7), respectively	0	0	(0.1)	(3.3)
Deferred commodity contracts hedging losses, net of tax of $0, ($0.2), $0 and ($0.2), respectively	0	(0.3)	0	(0.3)
Amortization of deferred interest rate swap hedging losses, net of tax of $0, $0, $0.1 and $0.1, respectively	0	0	0.1	0.1
Other comprehensive income (loss), net of tax	1.1	0.6	2.0	(1.8)
Comprehensive income (loss)	94.1	102.2	123.0	147.3
Less: Comprehensive income attributable to noncontrolling interests	1.3	7.7	6.3	17.2
Less: Deconsolidation of Enogex Holdings	6.1	0	6.1	0
Total comprehensive income attributable to OGE Energy	$ 86.7	$ 94.5	$ 110.6	$ 130.1