CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
OPERATING REVENUES
Electric Utility	$ 2,196.9		$ 2,453.1		$ 2,259.7
Natural Gas Midstream Operations (Note 1)	0.0		0.0		608.0
Total operating revenues	2,196.9		2,453.1		2,867.7
COST OF SALES
Electric Utility	865.0		1,106.6		950.0
Natural Gas Midstream Operations (Note 1)	0.0		0.0		478.9
Total cost of sales	865.0		1,106.6		1,428.9
OPERATING EXPENSES
Other operation and maintenance	451.6		439.6		489.2
Depreciation and amortization	307.9		281.4		297.3
Taxes other than income	91.2		88.7		98.8
Total operating expenses	850.7		809.7		885.3
Operating income (loss)	481.2		536.8		553.5
OTHER INCOME (EXPENSE)
Equity in earnings of unconsolidated affiliates (Note 1)	15.5	[1]	172.6		101.9
Allowance for equity funds used during construction	8.3		4.2		6.6
Other income	27.0		17.8		31.8
Other expense	(14.3)		(14.4)		(22.2)
Net other income	36.5		180.2		118.1
INTEREST EXPENSE
Interest on long-term debt	147.8		144.6		145.6
Allowance for borrowed funds used during construction	(4.2)		(2.4)		(3.4)
Interest on short-term debt and other interest charges	5.4		6.2		5.3
Interest expense	149.0		148.4		147.5
INCOME BEFORE TAXES	368.7		568.6		524.1
INCOME TAX EXPENSE	97.4		172.8		130.3
NET INCOME	271.3		395.8		393.8
Less: Net income attributable to noncontrolling interests	0.0		0.0		6.2
NET INCOME ATTRIBUTABLE TO OGE ENERGY	$ 271.3		$ 395.8		$ 387.6
BASIC AVERAGE COMMON SHARES OUTSTANDING	199.6		199.2		198.2
DILUTED AVERAGE COMMON SHARES OUTSTANDING	199.6		199.9		199.4
BASIC EARNINGS PER AVERAGE COMMON SHARE ATTRIBUTABLE TO OGE ENERGY COMMON SHAREHOLDERS	$ 1.36	[2]	$ 1.99	[2]	$ 1.96
DILUTED EARNINGS PER AVERAGE COMMON SHARE ATTRIBUTABLE TO OGE ENERGY COMMON SHAREHOLDERS	1.36	[2]	1.98	[2]	1.94
DIVIDENDS DECLARED PER COMMON SHARE	$ 1.05000		$ 0.95000		$ 0.85125

[1] In September 2015, the Company recorded a $108.4 million pre-tax charge for its share of the goodwill impairment, as adjusted for the basis difference. See Note 3 for further discussion of Enable's goodwill impairment.

[2] Due to the impact of dilution on the earnings per share calculation, quarterly earnings per share amounts may not add to the total.