CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Revenues from contracts with customers	[1]	$ 578.1	$ 1,621.0
Other revenues		11.2	9.6
Operating revenues		589.3	1,630.6
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE		255.7	1,346.8
OPERATING EXPENSES
Other operation and maintenance		115.0	109.3
Depreciation and amortization		107.4	98.7
Taxes other than income		28.1	27.2
Operating expenses		250.5	235.2
OPERATING INCOME		83.1	48.6
OTHER INCOME (EXPENSE)
Equity Securities, FV-NI, Gain (Loss)		282.3	0.0
Equity in earnings of unconsolidated affiliates		0.0	53.2
Allowance for equity funds used during construction		1.3	1.3
Other net periodic benefit expense		(9.4)	(1.4)
Other income		22.6	3.0
Other expense		(5.2)	(2.0)
Net other income		291.6	54.1
INTEREST EXPENSE
Interest on long-term debt		39.4	38.4
Allowance for borrowed funds used during construction		(1.2)	(0.8)
Interest on short-term debt and other interest charges		1.9	1.8
Interest expense		40.1	39.4
INCOME BEFORE TAXES		334.6	63.3
INCOME TAX EXPENSE		55.1	10.6
NET INCOME		$ 279.5	$ 52.7
BASIC AVERAGE COMMON SHARES OUTSTANDING		200.2	200.1
DILUTED AVERAGE COMMON SHARES OUTSTANDING		200.6	200.1
BASIC EARNINGS PER AVERAGE COMMON SHARE		$ 1.40	$ 0.26
DILUTED EARNINGS PER AVERAGE COMMON SHARE		$ 1.39	$ 0.26
Other Comprehensive Income (Loss), Net of Tax		$ 7.8	$ 3.5
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		287.3	56.2
OG&E [Member]
Revenues from contracts with customers		578.1	1,621.0
Other revenues		11.2	9.6
Operating revenues		589.3	1,630.6
FUEL, PURCHASED POWER AND DIRECT TRANSMISSION EXPENSE		255.7	1,346.8
OPERATING EXPENSES
Other operation and maintenance		115.5	110.3
Depreciation and amortization		107.4	98.7
Taxes other than income		26.8	25.7
Operating expenses		249.7	234.7
OPERATING INCOME		83.9	49.1
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction		1.3	1.3
Other net periodic benefit expense		(1.4)	(0.9)
Other income		1.2	1.7
Other expense		(0.4)	(0.4)
Net other income		0.7	1.7
INTEREST EXPENSE
Interest on long-term debt		38.5	38.4
Allowance for borrowed funds used during construction		(1.2)	(0.8)
Interest on short-term debt and other interest charges		0.9	0.8
Interest expense		38.2	38.4
INCOME BEFORE TAXES		46.4	12.4
INCOME TAX EXPENSE		7.4	1.2
NET INCOME		39.0	11.2
Other Comprehensive Income (Loss), Net of Tax		0.0	0.0
Comprehensive Income (Loss), Net of Tax, Attributable to Parent		$ 39.0	$ 11.2

[1] In February 2021, Winter Storm Uri resulted in record winter peak demand for electricity and extremely high natural gas and purchased power prices in OG&E's service territory. Operating revenues for the three months ended March 31, 2021 significantly increased due to increased fuel, purchased power and direct transmission expenses, which are generally recoverable from customers, as a result of Winter Storm Uri. For further discussion, see Note 14 and "Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operation."