CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues from contracts with customers	$ 3,304.2	$ 3,588.7	$ 2,069.8
Other revenues	71.5	65.0	52.5
OPERATING REVENUES
Operating revenues	3,375.7	3,653.7	2,122.3
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	1,662.4	2,127.6	644.6
OPERATING EXPENSES
Other operation and maintenance	501.4	463.1	462.8
Depreciation and amortization	460.9	416.0	391.3
Taxes other than income	101.5	102.8	101.4
Operating expenses	1,063.8	981.9	955.5
OPERATING INCOME	649.5	544.2	522.2
OTHER INCOME (EXPENSE)
Gain (loss) on equity securities (Note 1)	282.1	(8.6)	0.0
Equity in earnings (losses) of unconsolidated affiliates	0.0	169.8	(668.0)	[1],[2]
Allowance for equity funds used during construction	6.9	6.7	4.8
Other net periodic benefit income (expense)	(12.9)	(6.1)	(3.9)
Other income	74.6	26.3	37.5
Gain (Loss) on Disposition of Assets	0.0	344.4	0.0
Other expense	(44.6)	(39.9)	(35.2)
Net other income (expense)	306.1	492.6	(664.8)
INTEREST EXPENSE
Interest on long-term debt	162.1	154.8	152.8
Allowance for borrowed funds used during construction	(4.0)	(3.5)	(1.9)
Interest on short-term debt and other interest charges	8.2	7.0	7.6
Interest expense	166.3	158.3	158.5
INCOME (LOSS) BEFORE TAXES	789.3	878.5	(301.1)
INCOME TAX EXPENSE (BENEFIT)	123.6	141.2	(127.4)
NET INCOME (LOSS)	$ 665.7	$ 737.3	$ (173.7)
BASIC AVERAGE COMMON SHARES OUTSTANDING	200.2	200.1	200.1
DILUTED AVERAGE COMMON SHARES OUTSTANDING	200.8	200.3	200.1
BASIC EARNINGS (LOSS) PER AVERAGE COMMON SHARE	$ 3.33	$ 3.68	$ (0.87)
DILUTED EARNINGS (LOSS) PER AVERAGE COMMON SHARE	3.32	3.68	(0.87)
DIVIDENDS DECLARED PER COMMON SHARE	$ 1.6482	$ 1.6250	$ 1.5800
Other Comprehensive Income (Loss), Net of Tax	$ 12.9	$ 7.3	$ (4.2)
Comprehensive income (loss)	678.6	744.6	(177.9)
Og and E [Member]
Revenues from contracts with customers	3,304.2	3,588.7	2,069.8
Other revenues	71.5	65.0	52.5
OPERATING REVENUES
Operating revenues	3,375.7	3,653.7	2,122.3
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	1,662.4	2,127.6	644.6
OPERATING EXPENSES
Other operation and maintenance	491.9	464.7	464.4
Depreciation and amortization	460.9	416.0	391.3
Taxes other than income	98.0	99.3	97.2
Operating expenses	1,050.8	980.0	952.9
OPERATING INCOME	662.5	546.1	524.8
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	6.9	6.7	4.8
Other net periodic benefit income (expense)	1.2	(4.3)	(3.1)
Other income	6.5	7.1	5.0
Other expense	(3.4)	(1.8)	(2.6)
Net other income (expense)	11.2	7.7	4.1
INTEREST EXPENSE
Interest on long-term debt	157.4	152.7	152.8
Allowance for borrowed funds used during construction	(4.0)	(3.5)	(1.9)
Interest on short-term debt and other interest charges	4.4	2.8	3.9
Interest expense	157.8	152.0	154.8
INCOME (LOSS) BEFORE TAXES	515.9	401.8	374.1
INCOME TAX EXPENSE (BENEFIT)	76.4	41.8	34.7
NET INCOME (LOSS)	439.5	360.0	339.4
Net Income (Loss) Attributable to Parent	439.5	360.0	339.4
Other Comprehensive Income (Loss), Net of Tax	0.0	0.0	0.0
Comprehensive income (loss)	$ 439.5	$ 360.0	$ 339.4

[1] For the year ended December 31, 2020, Enable recorded a $225.0 million impairment on an equity method investment, which ran through OGE Energy's portion of Enable net income and was offset by basis differences that flow through the amortization of basis difference and dilution recognition line item above.

[2] In March 2020, OGE Energy recorded a $780.0 million impairment on its investment in Enable