CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net income	$ 101.6	$ 109.3	$ 149.1	$ 139.0
Pension Plan and Restoration of Retirement Income Plan:
Amortization of deferred net loss, net of tax of $0.5 million, $0.5 million, $0.9 million and $0.9 million, respectively	0.7	0.5	1.5	1.0
Amortization of prior service cost, net of tax of $0.1 million, ($0.1) million, $0.1 million and $0, respectively	0.1	0	0.1	0.2
Postretirement Plans:
Amortization of deferred net loss, net of tax of $0.3 million, $0.1 million, $0.6 million and $0.6 million, respectively	0.5	0.6	1.0	0.8
Amortization of deferred net transition obligation, net of tax of $0, ($0.1) million, $0 and $0, respectively	0	0	0	0.1
Amortization of prior service cost, net of tax of ($0.2) million, ($0.3) million, ($0.5) million and ($0.6) million, respectively	(0.4)	(0.3)	(0.9)	(0.9)
Prior service credit arising during the period, net of tax of $0, $0, $0 and $6.2 million, respectively	0	0	0	10.7
Deferred commodity contracts hedging (gains) losses reclassified in net income, net of tax of $0, $3.4 million, ($1.7) million and $6.6 million, respectively	0	7.3	(3.3)	13.9
Deferred commodity contracts hedging losses, net of tax of ($0.2) million, ($0.5) million, ($0.2) million and ($2.5) million, respectively	(0.3)	(1.8)	(0.3)	(6.9)
Deferred interest rate swaps hedging losses reclassified in net income, net of tax of $0, $0, $0.1 million and $0.1 million, respectively	0	0.1	0.1	0.2
Other comprehensive income (loss), net of tax	0.6	6.4	(1.8)	19.1
Comprehensive income (loss)	102.2	115.7	147.3	158.1
Less: Comprehensive income attributable to noncontrolling interest for sale of equity investment	0	0	0	(1.7)
Less: Comprehensive income attributable to noncontrolling interests	7.7	7.5	17.2	13.5
Total comprehensive income attributable to OGE Energy	$ 94.5	$ 108.2	$ 130.1	$ 146.3