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.