CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenues from contracts with customers	$ 719.7	$ 644.1	$ 1,460.8	$ 1,226.7
Other revenues	21.9	18.5	28.5	32.7
Operating revenues	741.6	662.6	1,489.3	1,259.4
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	261.1	193.9	585.1	426.1
OPERATING EXPENSES
Other operation and maintenance	127.1	130.4	248.9	262.8
Depreciation and amortization	140.6	135.5	278.0	264.7
Taxes other than income	26.2	26.9	57.4	55.9
Operating expenses	293.9	292.8	584.3	583.4
OPERATING INCOME	186.6	175.9	319.9	249.9
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	6.0	6.6	13.0	11.3
Other net periodic benefit income (expense)	(2.9)	1.6	(5.5)	3.3
Other income	17.2	8.9	24.2	13.4
Other expense	(5.2)	(6.6)	(9.7)	(11.1)
Net other income	15.1	10.5	22.0	16.9
INTEREST EXPENSE
Interest on long-term debt	66.6	54.9	128.0	106.9
Allowance for borrowed funds used during construction	(3.7)	(3.4)	(8.2)	(6.8)
Interest on short-term debt and other interest charges	9.3	13.4	19.7	25.0
Interest expense	72.2	64.9	139.5	125.1
INCOME BEFORE TAXES	129.5	121.5	202.4	141.7
INCOME TAX EXPENSE	22.0	19.2	32.2	20.8
NET INCOME	$ 107.5	$ 102.3	$ 170.2	$ 120.9
BASIC AVERAGE COMMON SHARES OUTSTANDING	201.3	200.8	201.3	200.6
DILUTED AVERAGE COMMON SHARES OUTSTANDING	202.1	201.4	202.0	201.0
BASIC EARNINGS PER AVERAGE COMMON SHARE	$ 0.53	$ 0.51	$ 0.85	$ 0.6
DILUTED EARNINGS PER AVERAGE COMMON SHARE	$ 0.53	$ 0.51	$ 0.84	$ 0.6
Other comprehensive income, net of tax	$ 0.1	$ 0.1
Comprehensive income	107.6	102.4	$ 170.4	$ 124.9
OG&E [Member]
Revenues from contracts with customers	719.7	644.1	1,460.8	1,226.7
Other revenues	21.9	18.5	28.5	32.7
Operating revenues	741.6	662.6	1,489.3	1,259.4
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE	261.1	193.9	585.1	426.1
OPERATING EXPENSES
Other operation and maintenance	126.3	130.2	248.1	262.6
Depreciation and amortization	140.6	135.5	278.0	264.7
Taxes other than income	26.2	26.9	57.4	55.9
Operating expenses	293.1	292.6	583.5	583.2
OPERATING INCOME	187.4	176.1	320.7	250.1
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	6.0	6.6	13.0	11.3
Other net periodic benefit income (expense)	(2.6)	1.8	(5.1)	3.6
Other income	4.1	3.2	9.4	5.2
Other expense	(0.5)	(1.4)	(1.4)	(3.3)
Net other income	7.0	10.2	15.9	16.8
INTEREST EXPENSE
Interest on long-term debt	60.8	51.3	116.4	102.4
Allowance for borrowed funds used during construction	(3.7)	(3.4)	(8.2)	(6.8)
Interest on short-term debt and other interest charges	6.3	7.0	12.0	10.7
Interest expense	63.4	54.9	120.2	106.3
INCOME BEFORE TAXES	131.0	131.4	216.4	160.6
INCOME TAX EXPENSE	23.3	22.1	37.7	26.1
NET INCOME	107.7	109.3	178.7	134.5
Other comprehensive income, net of tax	0.0	0.0	0.0	0.0
Comprehensive income	$ 107.7	$ 109.3	$ 178.7	$ 134.5