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Credit Facilities and Short-Term Debt - Schedule of Line of Credit Facilities (Parenthetical) (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2024 USD ($) | Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($)
Line of Credit Facility [Line Items] |  |  |  |
Outstanding Intercompany Borrowings |  | $ 200,000 |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | 1,160,000,000 |  |
Og and E [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Intercompany Borrowing Agreement - Maximum Borrowing Capacity |  | $ 450,000,000 |  |
Credit facility termination date | [1],[2],[3] | Dec. 18, 2029 |  |
Line of Credit Facility, Current Borrowing Capacity | [2],[3] | $ 550,000,000 |  |
Advances from parent |  | $ 247,600,000 |  | $ 147,700,000
OGE Energy [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Credit facility termination date | [1],[4] | Dec. 18, 2029 |  |
Line of Credit Facility, Current Borrowing Capacity | [4] | $ 550,000,000 |  |
OGE Energy [Member] | Series Due May 24, 2025 [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Long term debt |  | 120,000,000 | $ 120,000,000 |
OGE Energy [Member] | Series due August 15, 2028 [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 155,000,000 |  |
Debt Instrument Maximum Leverage Ratio |  | 0.7 |  |
Credit Facility [Member] | OGE Energy [Member] | Series Due May 24, 2025 [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Long term debt |  | $ 60,000,000 | $ 60,000,000 |
Term Loan [Member] | OGE Energy [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Credit facility termination date | [5] | May 24, 2027 |  |
Line of Credit Facility, Current Borrowing Capacity | [5] | $ 60,000,000 |  |
Term Loan [Member] | OGE Energy [Member] | Series Due May 24, 2025 [Member] |  |  |  |
Line of Credit Facility [Line Items] |  |  |  |
Long term debt |  | $ 60,000,000 |  |
[1] | In December 2022, the Registrants entered into an amendment to their credit facility that gave each of the Registrants the option of extending such commitments for up to two additional one-year periods. On December 18, 2024, the Registrants utilized the second extension option for an additional one-year period extending the term until December 2029.
[2] | OG&E has an intercompany borrowing agreement with OGE Energy whereby OG&E has access to up to $450.0 million of OGE Energy's revolving credit amount. This agreement has a termination date of December 18, 2029. At December 31, 2024, there was $0.2 million intercompany borrowings under this agreement.
[3] | This bank facility is available to back up OG&E's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.
[4] | This bank facility is available to back up OGE Energy's commercial paper borrowings and to provide revolving credit borrowings. This bank facility can also be used as a letter of credit facility.
[5] | OGE Energy has a $120.0 million floating rate unsecured three-year credit agreement, of which $60.0 million is considered a revolving loan, which is included in the table above, and $60.0 million is considered a term loan. The credit agreement, under certain circumstances, may be increased to a maximum commitment limit of $155.0 million and includes a maximum leverage ratio of 0.70 to 1.0. The other covenants under this credit agreement are substantially the same as OGE Energy's existing $550.0 million revolving credit agreement.

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