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v3.25.3

Long-Term Debt (Additional Information) (Details) - USD ($) $ in Millions |  | 9 Months Ended
--- | --- | ---
Apr. 01, 2025 | Sep. 30, 2025 | Sep. 30, 2024
Debt Instrument [Line Items] |  |  |
Percent of Principal Amount Subject to Optional Tender |  | 100.00% |
Long term debt repaid |  | $ 32.5 | $ 0.1
Garfield Industrial Authority Bond [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt instrument, maturity date |  | Oct. 01, 2039 |
OGE Energy [Member] | Senior Notes due April 1, 2055 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt | $ 350.0 |  |
OGE Energy [Member] | Senior Notes due April 1, 2055 [Member] | Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.80% |  |
Debt instrument, maturity date | Apr. 01, 2055 |  |
OGE Energy [Member] | Muskogee Industrial Authority Bond Due 2025 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long term debt repaid |  | $ 32.4 |
Debt instrument, maturity date |  | Jan. 01, 2025 |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481139/470-20-50-4 + Details
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