CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
OPERATING REVENUES
Electric Utility operating revenues	$ 574.6	$ 528.0	$ 1,030.1	$ 954.7
Natural Gas Midstream Operations operating revenues (Note 1)	159.6	327.0	605.5	741.0
Total operating revenues	734.2	855.0	1,635.6	1,695.7
COST OF GOODS SOLD (exclusive of depreciation and amortization shown below)
Electric Utility cost of goods sold	242.8	192.7	442.2	376.3
Natural Gas Midstream Operations cost of goods sold (Note 1)	127.8	216.6	481.4	518.3
Total cost of goods sold	370.6	409.3	923.6	894.6
Gross margin on revenues	363.6	445.7	712.0	801.1
OPERATING EXPENSES
Other operation and maintenance	122.0	153.0	270.0	300.6
Depreciation and amortization	74.4	90.5	166.3	177.1
Impairment of assets	0	0.1	0	0.3
Gain on insurance proceeds	0	0	0	(7.5)
Taxes other than income	23.3	24.8	56.4	55.0
Total operating expenses	219.7	268.4	492.7	525.5
OPERATING INCOME	143.9	177.3	219.3	275.6
OTHER INCOME (EXPENSE)
Equity in earnings of unconsolidated affiliates (Note 1)	18.5	0	18.5	0
Allowance for equity funds used during construction	1.5	1.7	2.7	3.6
Other income	4.5	2.5	19.2	10.2
Other expense	(4.2)	(3.6)	(10.7)	(5.5)
Net other income	20.3	0.6	29.7	8.3
INTEREST EXPENSE
Interest on long-term debt	36.0	38.9	75.7	78.1
Allowance for borrowed funds used during construction	(0.7)	(0.9)	(1.4)	(2.0)
Interest on short-term debt and other interest charges	2.0	2.4	4.2	4.4
Interest expense	37.3	40.4	78.5	80.5
INCOME BEFORE TAXES	126.9	137.5	170.5	203.4
INCOME TAX EXPENSE	33.9	35.9	49.5	54.3
NET INCOME	93.0	101.6	121.0	149.1
Less: Net income attributable to noncontrolling interests	1.3	7.7	6.2	18.1
NET INCOME ATTRIBUTABLE TO OGE ENERGY	$ 91.7	$ 93.9	$ 114.8	$ 131.0
BASIC AVERAGE COMMON SHARES OUTSTANDING	198.3	197.2	198.0	196.8
DILUTED AVERAGE COMMON SHARES OUTSTANDING	199.4	197.8	199.1	197.6
BASIC EARNINGS PER AVERAGE COMMON SHARE ATTRIBUTABLE TO OGE ENERGY COMMON SHAREHOLDERS	$ 0.46	$ 0.48	$ 0.58	$ 0.66
DILUTED EARNINGS PER AVERAGE COMMON SHARE ATTRIBUTABLE TO OGE ENERGY COMMON SHAREHOLDERS	$ 0.46	$ 0.47	$ 0.58	$ 0.66
DIVIDENDS DECLARED PER COMMON SHARE	$ 0.20875	$ 0.19625	$ 0.4175	$ 0.3925