CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income	$ 393.8	$ 385.0	$ 363.6
Pension Plan and Restoration of Retirement Income Plan:
Amortization of deferred net loss, net of tax of $2.4, $1.7 and $1.4, respectively	3.7	3.0	2.5
Net gain (loss) arising during the period, net of tax of $7.8, ($5.6) and ($6.7), respectively	12.4	(10.2)	(13.5)
Amortization of prior service cost, net of tax of $0, $0.2 and $0.2, respectively	0	0.2	0.4
Settlement cost, net of tax of $1.9, $0 and $0, respectively	3.0	0	0
Postretirement Benefit Plans:
Amortization of deferred net loss, net of tax of $1.3, ($1.1) and ($1.6), respectively	2.0	2.0	1.8
Net loss arising during the period, net of tax of $4.4, ($1.1) and ($3.1), respectively	6.9	(2.3)	(3.6)
Amortization of deferred net transition obligation, net of tax of $0, $0.1 and $0.1, respectively	0	0.1	0.2
Amortization of prior service cost, net of tax of $(1.1), ($1.0) and ($1.6), respectively	(1.8)	(1.8)	(1.8)
Prior service credit arising during the period, net of tax of $0, $0, and $9.5, respectively	0	0	10.8
Deferred commodity contracts hedging (gains) losses reclassified in net income, net of tax of $0.4, ($1.6) and $12.6, respectively	0.6	(3.6)	27.6
Deferred commodity contracts hedging gains (losses), net of tax of $0, $0.1 and ($1.7), respectively	0	0.4	(4.8)
Amortization of deferred interest rate swap hedging losses, net of tax of $0.1, $0.2, and $0.2, respectively	0.3	0.2	0.3
Other comprehensive income (loss), net of tax	27.1	(12.0)	19.9
Comprehensive income (loss)	420.9	373.0	383.5
Less: Comprehensive income attributable to noncontrolling interest for sale of equity investment	0	(0.5)	(3.2)
Less: Comprehensive income attributable to noncontrolling interests	6.3	27.0	24.2
Less: Deconsolidation of Enogex Holdings	6.1	0	0
Total comprehensive income attributable to OGE Energy	$ 408.5	$ 346.5	$ 362.5