CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenues from contracts with customers	$ 544.6	$ 578.1
Other revenues	12.6	11.2
Revenues, Total	557.2	589.3
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	200.6	255.7
OPERATING EXPENSES
Other operation and maintenance	130.4	115.0
Depreciation and amortization	121.2	107.4
Taxes other than income	28.5	28.1
Operating expenses	280.1	250.5
OPERATING INCOME	76.5	83.1
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	4.5	1.3
Other net periodic benefit income (expense)	1.5	(9.4)
Gain on equity securities	0.0	282.3
Other income	16.9	22.6
Other expense	(6.5)	(5.2)
Net other income	16.4	291.6
INTEREST EXPENSE
Interest on long-term debt	48.1	39.4
Allowance for borrowed funds used during construction	(2.1)	(1.2)
Interest on short-term debt and other interest charges	1.8	1.9
Interest expense	47.8	40.1
INCOME BEFORE TAXES	45.1	334.6
INCOME TAX EXPENSE	6.8	55.1
NET INCOME	$ 38.3	$ 279.5
BASIC AVERAGE COMMON SHARES OUTSTANDING	200.2	200.2
DILUTED AVERAGE COMMON SHARES OUTSTANDING	200.8	200.6
BASIC EARNINGS PER AVERAGE COMMON SHARE	$ 0.19	$ 1.40
DILUTED EARNINGS PER AVERAGE COMMON SHARE	$ 0.19	$ 1.39
Other comprehensive income, net of tax	$ 1.1	$ 7.8
Comprehensive income	39.4	287.3
OG&E [Member]
Revenues from contracts with customers	544.6	578.1
Other revenues	12.6	11.2
Revenues, Total	557.2	589.3
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	200.6	255.7
OPERATING EXPENSES
Other operation and maintenance	131.5	115.5
Depreciation and amortization	121.2	107.4
Taxes other than income	27.1	26.8
Operating expenses	279.8	249.7
OPERATING INCOME	76.8	83.9
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	4.5	1.3
Other net periodic benefit income (expense)	1.6	(1.4)
Other income	10.1	1.2
Other expense	(0.9)	(0.4)
Net other income	15.3	0.7
INTEREST EXPENSE
Interest on long-term debt	46.5	38.5
Allowance for borrowed funds used during construction	(2.1)	(1.2)
Interest on short-term debt and other interest charges	1.3	0.9
Interest expense	45.7	38.2
INCOME BEFORE TAXES	46.4	46.4
INCOME TAX EXPENSE	6.6	7.4
NET INCOME	39.8	39.0
Other comprehensive income, net of tax	0.0	0.0
Comprehensive income	$ 39.8	$ 39.0