CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Net income	$ 181.4	$ 163.5	$ 320.4	$ 266.6
Pension Plan and Restoration of Retirement Income Plan:
Amortization of deferred net loss, net of tax of $0.3 million, $0.4 million, $1.2 million and $1.4 million, respectively	0.7	0.6	1.7	1.6
Amortization of prior service cost, net of tax of $0, $0.1 million, $0 and $0.1 million, respectively	0.1	0.1	0.3	0.2
Postretirement plans:
Amortization of deferred net loss, net of tax of $0.2 million, $0.2 million, $0.8 million and $0.2 million, respectively	0.5	0.3	1.3	1.2
Amortization of deferred net transition obligation, net of tax of $0, $0, $0 and $0.1 million, respectively	0	0	0.1	0.3
Amortization of prior service cost, net of tax of ($0.2) million, $0, ($0.8) million and ($0.1) million, respectively	(0.5)	0	(1.4)	(0.2)
Prior service cost arising during the period, net of tax of $0, $0, $6.2 million and $0, respectively	0	0	10.7	0
Deferred commodity contracts hedging losses reclassified in net income, net of tax of $3.4 million, $2.1 million, $10.3 million and $7.3 million, respectively	6.7	3.4	20.2	11.6
Deferred commodity contracts hedging gains (losses), net of tax of $0.1 million, ($6.6) million, ($2.7) million and ($5.6) million, respectively	0.2	(10.4)	(6.3)	(9.0)
Deferred interest rate swaps hedging gains, net of tax of $0, $0, $0.2 million and $0.1 million, respectively	0	0	0.2	0.1
Other comprehensive income (loss), net of tax	7.7	(6.0)	26.8	5.8
Comprehensive income (loss)	189.1	157.5	347.2	272.4
Less: Comprehensive income attributable to noncontrolling interest for sale of equity investment	0	0	(1.7)	0
Less: Comprehensive income attributable to noncontrolling interests	4.2	0.4	17.7	2.0
Total comprehensive income (loss) attributable to OGE Energy	$ 184.9	$ 157.1	$ 331.2	$ 270.4