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Long-Term Debt (Additional Information) (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2023 | Apr. 30, 2023 | Jan. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Debt Instrument [Line Items] |  |  |  |  |  |
Percent of Principal Amount Subject to Optional Tender |  | 100.00% |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  | $ 1,150.0 |  |  |  |
Term Loan [Member] | Series Due May 24, 2025 [Member] | Maximum [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 6.375% |  |  |  |
Term Loan [Member] | Series Due May 24, 2025 [Member] | Minimum [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.375% |  |  |  |
OG&E [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-Term Debt, Maturity, Year Two |  | $ 79.4 |  |  |  |
Long-Term Debt, Maturity, Year Four |  | 181.0 |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Five |  | 500.0 |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | [1],[2] | $ 550.0 |  |  |  |
Maturity | [1],[2],[3] | Dec. 18, 2028 |  |  |  |
OGE Energy [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long-Term Debt, Maturity, Year Two |  | $ 129.4 |  |  |  |
Long-Term Debt, Maturity, Year Four |  | 181.0 |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Five |  | 500.0 |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | [4] | $ 550.0 |  |  |  |
Maturity | [3],[4] | Dec. 18, 2028 |  |  |  |
OGE Energy [Member] | Series Due May 24, 2025 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long term debt |  | $ 100.0 |  |  |  |
OGE Energy [Member] | Credit Facility [Member] | Series Due May 24, 2025 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long term debt |  | 50.0 |  |  |  |
OGE Energy [Member] | Term Loan [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity | [5] | $ 50.0 |  |  |  |
Maturity | [5] | May 24, 2025 |  |  |  |
OGE Energy [Member] | Term Loan [Member] | Series Due May 24, 2025 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long term debt |  | $ 50.0 |  |  |  |
Senior Notes [Member] | OG&E [Member] | Series Due August 15, 2028 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long term debt |  | $ 400.0 |  |  | $ 400.0 |
Senior Notes [Member] | OG&E [Member] | Senior Notes due January 15, 2033 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long term debt |  |  |  | $ 450.0 |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  | 5.40% |  |
Debt Instrument, Maturity Date |  | Jan. 15, 2033 |  |  |  |
Senior Notes [Member] | OG&E [Member] | Senior Notes Due April 1 2053 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long term debt |  |  | $ 350.0 |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  | 5.60% |  |  |
Debt Instrument, Maturity Date |  | Apr. 01, 2053 |  |  |  |
Senior Notes [Member] | OG&E [Member] | Series Due May 26, 2023 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long term debt |  | $ 0.0 |  |  | 500.0 | $ 500.0
Debt Instrument, Interest Rate, Stated Percentage |  | 0.553% |  |  |  | 0.553%
Debt Instrument, Maturity Date |  | May 26, 2023 |  |  |  |
Senior Notes [Member] | OGE Energy [Member] | Series Due May 26, 2023 [Member] |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Long term debt |  | $ 0.0 |  |  | $ 500.0 | $ 500.0
Debt Instrument, Interest Rate, Stated Percentage |  | 0.703% |  |  |  | 0.703%
Debt Instrument, Maturity Date |  | May 26, 2023 |  |  |  |
[1] | 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, 2028. At December 31, 2023, there was $85.1 million in intercompany borrowings under this agreement.
[2] | 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.
[3] | 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, 2023, the Registrants utilized the first extension option for an additional one-year period extending the term until December 2028.
[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 $100.0 million floating rate unsecured three-year credit agreement, of which $50.0 million is considered a revolving loan and $50.0 million is considered a term loan. The credit agreement, under certain circumstances, may be increased to a maximum commitment limit of $135.0 million and includes a maximum leverage ratio of 0.65 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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