v3.25.4

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Income Taxes [Line Items]
Accelerated depreciation and other property related differences	$ 1,907.6	$ 1,809.5
Regulatory assets	66.6	65.6
Pension Plan	21.5	22.0
Corporate owned life insurance	3.1	2.8
Bond redemption-unamortized costs	1.0	1.2
State tax credits	(223.6)	(223.8)
Income taxes recoverable from customers, net	(173.6)	(188.6)
Regulatory liabilities	(59.8)	(57.3)
Asset retirement obligations	(18.8)	(20.9)
Postretirement medical and life insurance benefits	(21.5)	(19.1)
Accrued liabilities	(9.0)	(15.7)
Deferred federal investment tax credits	(2.4)	(2.5)
Accrued vacation	(1.7)	(1.9)
Uncollectible accounts	(1.0)	(0.5)
Other	0.9	0.3
Deferred Income Tax Liabilities, Net, Total	1,489.3	1,371.1
OG&E [Member]
Income Taxes [Line Items]
Accelerated depreciation and other property related differences	1,907.6	1,809.5
Regulatory assets	66.6	65.6
Pension Plan	38.5	38.6
Corporate owned life insurance	0.0	0.0
Bond redemption-unamortized costs	1.0	1.2
State tax credits	(208.6)	(208.5)
Income taxes recoverable from customers, net	(173.6)	(188.6)
Regulatory liabilities	(59.8)	(57.3)
Asset retirement obligations	(18.8)	(20.9)
Postretirement medical and life insurance benefits	(15.1)	(12.6)
Accrued liabilities	(2.7)	(9.8)
Deferred federal investment tax credits	(2.4)	(2.5)
Accrued vacation	(1.7)	(1.9)
Uncollectible accounts	(1.0)	(0.5)
Other	1.3	(1.6)
Deferred Income Tax Liabilities, Net, Total	$ 1,531.3	$ 1,410.7

Deferred tax liabilities corporate owned life insurance.

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- Definition

Deferred Tax Liabilities, Income Taxes Refundable to Customers, Net

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- Definition

Deferred Tax Liabilities, Unamortized Bond Redemption Costs

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- Definition

Income taxes.

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- Definition

Non-Current Deferred Tax Assets, Deferred Federal Investment Tax Credits

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- Definition

Non-Current Deferred Tax Assets, Regulatory Liabilities

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- Definition

Non-Current Deferred Tax Assets, State Tax Credits

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No definition available.

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- Definition

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(15)(b)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482525/740-10-45-4

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482525/740-10-45-6

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482685/740-10-50-6

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.

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- Definition

Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary difference from allowance for credit loss on accounts receivable.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from asset retirement obligations. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset.

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Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from reserves and accruals, classified as other.

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Amount of deferred tax liability attributable to taxable temporary differences classified as other.

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Amount of deferred tax consequences attributable to taxable temporary differences derived from prepaid expenses.

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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- Definition

Amount of deferred tax liability attributable to taxable temporary differences from regulatory assets.

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OGE ENERGY CORP. 10-K