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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Income Taxes [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

The following table presents the components of income tax expense (benefit).

		OGE Energy												OG&E
Year Ended December 31 (In millions)		2024				2023				2022				2024				2023				2022
Provision (benefit) for current income taxes:
Federal		$	62.0			$	46.1			$	250.8			$	72.7			$	48.9			$	(141.2	)
State			0.8				(2.2	)			28.8				3.0				3.7				(0.9	)
Total provision (benefit) for current income taxes			62.8				43.9				279.6				75.7				52.6				(142.1	)
Provision (benefit) for deferred income taxes, net:
Federal			8.0				18.1				(110.8	)			9.0				18.8				219.9
State			8.3				(5.8	)			(45.2	)			8.5				(2.6	)			(1.4	)
Total provision (benefit) for deferred income taxes, net			16.3				12.3				(156.0	)			17.5				16.2				218.5
Total income tax expense		$	79.1			$	56.2			$	123.6			$	93.2			$	68.8			$	76.4

Schedule of Effective Income Tax Rate Reconciliation

The following table presents a reconciliation of the statutory tax rates to the effective income tax rate.

		OGE Energy										OG&E
Year Ended December 31		2024			2023			2022				2024			2023			2022
Statutory federal tax rate			21.0	%		21.0	%		21.0	%			21.0	%		21.0	%		21.0	%
State income taxes, net of federal income tax benefit			1.3			(1.3	)		(1.0	)			1.5			0.3			(0.4	)
Stock-based compensation			(0.3	)		0.1			—				(0.1	)		—			—
Executive compensation limitation			0.2			0.2			0.1				0.1			—			—
Amortization of net unfunded deferred taxes			(6.3	)		(7.0	)		(3.2	)			(5.8	)		(6.7	)		(5.0	)
Remeasurement of state deferred tax liabilities			—			—			(0.6	)			—			—			—
401(k) dividends			(0.2	)		(0.3	)		(0.2	)			—			—			—
Other			(0.5	)		(0.8	)		(0.4	)			(0.1	)		(0.7	)		(0.8	)
Effective income tax rate			15.2	%		11.9	%		15.7	%			16.6	%		13.9	%		14.8	%

Schedule of Deferred Tax Assets and Liabilities

The following table presents the components of Deferred Income Taxes at December 31, 2024 and 2023.

		OGE Energy								OG&E
December 31 (In millions)		2024				2023				2024				2023
Deferred income tax liabilities, net:
Accelerated depreciation and other property related differences		$	1,809.5			$	1,753.8			$	1,809.5			$	1,753.8
Regulatory assets			65.6				67.6				65.6				67.6
Pension Plan			22.0				21.8				38.6				37.9
Corporate owned life insurance			2.8				2.6				—				—
Bond redemption-unamortized costs			1.2				1.4				1.2				1.4
Income taxes recoverable from customers, net			(188.6	)			(202.7	)			(188.6	)			(202.7	)
State tax credits			(223.8	)			(228.8	)			(208.5	)			(213.5	)
Regulatory liabilities			(57.3	)			(54.4	)			(57.3	)			(54.4	)
Asset retirement obligations			(20.9	)			(19.7	)			(20.9	)			(19.7	)
Postretirement medical and life insurance benefits			(19.1	)			(20.8	)			(12.6	)			(14.0	)
Accrued liabilities			(15.7	)			(13.2	)			(9.8	)			(5.5	)
Deferred federal investment tax credits			(2.5	)			(2.7	)			(2.5	)			(2.7	)
Accrued vacation			(1.9	)			(1.4	)			(1.9	)			(1.4	)
Uncollectible accounts			(0.5	)			(0.5	)			(0.5	)			(0.4	)
Other			0.3				(2.2	)			(1.6	)			(5.6	)
Total deferred income tax liabilities, net		$	1,371.1			$	1,300.8			$	1,410.7			$	1,340.8

Schedule of Unrecognized Tax Benefits Roll Forward

The following table presents a reconciliation of the Registrants' total gross unrecognized tax benefits as of the years ended December 31, 2024, 2023 and 2022.

(In millions)		2024				2023				2022
Balance at January 1		$	28.6			$	20.7			$	22.4
Tax positions related to current year:
Additions			—				7.9				—
Reductions			—				—				(1.7	)
Balance at December 31		$	28.6			$	28.6			$	20.7

Summary of Tax Credit Carryforwards

The following table presents a summary of the Registrants' tax credits carried forward as deferred tax assets. Under current law, the Registrants expect future taxable income will be sufficient to utilize all credits before they begin to expire after 2030.

		OGE Energy								OG&E
(In millions)		Carry Forward Amount				Deferred Tax Asset				Carry Forward Amount				Deferred Tax Asset				Earliest Expiration Date
State tax credits:
Oklahoma investment tax credits		$	264.3			$	208.8			$	245.0			$	193.5			N/A
Oklahoma capital investment board credits		$	12.8			$	12.8			$	12.8			$	12.8			N/A
Oklahoma zero emission tax credits		$	4.2			$	2.2			$	4.2			$	2.2			2030

N/A - not applicable

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Income Taxes [Abstract]

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Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets.

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Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations.

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Tabular disclosure of the change in unrecognized tax benefits.

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Tabular disclosure of tax credit carryforwards available to reduce future taxable income, including amounts, expiration dates, limitations on use and the related deferred tax assets and valuation allowances.

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