CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenues from contracts with customers	$ 644.1	$ 589.2	$ 1,226.7	$ 1,133.8
Other revenues	18.5	15.8	32.7	28.4
Operating revenues	662.6	605.0	1,259.4	1,162.2
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	193.9	181.8	426.1	382.4
OPERATING EXPENSES
Other operation and maintenance	130.4	128.3	262.8	258.7
Depreciation and amortization	135.5	124.1	264.7	245.3
Taxes other than income	26.9	24.4	55.9	52.9
Operating expenses	292.8	276.8	583.4	556.9
OPERATING INCOME	175.9	146.4	249.9	222.9
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	6.6	5.1	11.3	9.6
Other net periodic benefit income	1.6	1.1	3.3	2.6
Other income	8.9	12.7	13.4	29.6
Other expense	(6.6)	(4.4)	(11.1)	(10.9)
Net other income	10.5	14.5	16.9	30.9
INTEREST EXPENSE
Interest on long-term debt	54.9	52.9	106.9	101.0
Allowance for borrowed funds used during construction	(3.4)	(1.3)	(6.8)	(3.4)
Interest on short-term debt and other interest charges	13.4	6.1	25.0	7.9
Interest expense	64.9	57.7	125.1	105.5
INCOME BEFORE TAXES	121.5	103.2	141.7	148.3
INCOME TAX EXPENSE	19.2	14.8	20.8	21.6
NET INCOME	$ 102.3	$ 88.4	$ 120.9	$ 126.7
BASIC AVERAGE COMMON SHARES OUTSTANDING	200.8	200.3	200.6	200.3
DILUTED AVERAGE COMMON SHARES OUTSTANDING	201.4	200.8	201.0	200.8
BASIC EARNINGS PER AVERAGE COMMON SHARE	$ 0.51	$ 0.44	$ 0.6	$ 0.63
DILUTED EARNINGS PER AVERAGE COMMON SHARE	$ 0.51	$ 0.44	$ 0.6	$ 0.63
Other comprehensive income, net of tax	$ 0.1	$ 0.5
Comprehensive income	102.4	88.9	$ 124.9	$ 128.3
OG&E [Member]
Revenues from contracts with customers	644.1	589.2	1,226.7	1,133.8
Other revenues	18.5	15.8	32.7	28.4
Operating revenues	662.6	605.0	1,259.4	1,162.2
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	193.9	181.8	426.1	382.4
OPERATING EXPENSES
Other operation and maintenance	130.2	128.6	262.6	260.1
Depreciation and amortization	135.5	124.1	264.7	245.3
Taxes other than income	26.9	23.5	55.9	50.6
Operating expenses	292.6	276.2	583.2	556.0
OPERATING INCOME	176.1	147.0	250.1	223.8
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	6.6	5.1	11.3	9.6
Other net periodic benefit income	1.8	1.6	3.6	3.2
Other income	3.2	8.3	5.2	18.4
Other expense	(1.4)	(1.8)	(3.3)	(2.7)
Net other income	10.2	13.2	16.8	28.5
INTEREST EXPENSE
Interest on long-term debt	51.3	51.6	102.4	98.1
Allowance for borrowed funds used during construction	(3.4)	(1.3)	(6.8)	(3.4)
Interest on short-term debt and other interest charges	7.0	1.8	10.7	3.1
Interest expense	54.9	52.1	106.3	97.8
INCOME BEFORE TAXES	131.4	108.1	160.6	154.5
INCOME TAX EXPENSE	22.1	16.2	26.1	22.8
NET INCOME	109.3	91.9	134.5	131.7
Other comprehensive income, net of tax	0.0	0.0	0.0	0.0
Comprehensive income	$ 109.3	$ 91.9	$ 134.5	$ 131.7