CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
OPERATING REVENUES
Electric Utility operating revenues	$ 528.0	$ 568.7	$ 954.7	$ 990.8
Natural Gas Midstream Operations operating revenues	327.0	409.4	741.0	827.8
Total operating revenues	855.0	978.1	1,695.7	1,818.6
COST OF GOODS SOLD (exclusive of depreciation and amortization shown below)
Electric Utility cost of goods sold	192.7	242.5	376.3	450.0
Natural Gas Midstream Operations cost of goods sold	216.6	307.6	518.3	633.3
Total cost of goods sold	409.3	550.1	894.6	1,083.3
Gross margin on revenues	445.7	428.0	801.1	735.3
OPERATING EXPENSES
Other operation and maintenance	153.0	146.6	300.6	284.9
Depreciation and amortization	90.5	74.7	177.1	148.7
Impairment of assets	0.1	0	0.3	0
Gain on insurance proceeds	0	0	(7.5)	0
Taxes other than income	24.8	24.5	55.0	51.6
Total operating expenses	268.4	245.8	525.5	485.2
OPERATING INCOME	177.3	182.2	275.6	250.1
OTHER INCOME (EXPENSE)
Interest income	0.1	0.1	0.1	0.2
Allowance for equity funds used during construction	1.7	5.8	3.6	10.2
Other income	2.4	7.0	10.1	13.3
Other expense	(3.6)	(3.5)	(5.5)	(5.8)
Net other income	0.6	9.4	8.3	17.9
INTEREST EXPENSE
Interest on long-term debt	38.9	35.8	78.1	71.2
Allowance for borrowed funds used during construction	(0.9)	(2.9)	(2.0)	(5.2)
Interest on short-term debt and other interest charges	2.4	1.6	4.4	2.6
Interest expense	40.4	34.5	80.5	68.6
INCOME BEFORE TAXES	137.5	157.1	203.4	199.4
INCOME TAX EXPENSE	35.9	47.8	54.3	60.4
NET INCOME	101.6	109.3	149.1	139.0
Less: Net income attributable to noncontrolling interests	7.7	6.3	18.1	11.2
NET INCOME ATTRIBUTABLE TO OGE ENERGY	$ 93.9	$ 103.0	$ 131.0	$ 127.8
BASIC AVERAGE COMMON SHARES OUTSTANDING (in shares)	98.6	98.0	98.4	97.8
DILUTED AVERAGE COMMON SHARES OUTSTANDING (in shares)	98.9	99.3	98.8	99.2
BASIC EARNINGS PER AVERAGE COMMON SHARE ATTRIBUTABLE TO OGE ENERGY COMMON SHAREHOLDERS (in dollars per share)	$ 0.95	$ 1.05	$ 1.33	$ 1.31
DILUTED EARNINGS PER AVERAGE COMMON SHARE ATTRIBUTABLE TO OGE ENERGY COMMON SHAREHOLDERS (in dollars per share)	$ 0.95	$ 1.04	$ 1.33	$ 1.29
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)	$ 0.3925	$ 0.3750	$ 0.7850	$ 0.7500