Short-Term Debt and Credit Facilities - Schedule of Line of Credit Facilities (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Line of Credit Facility [Line Items]
Aggregate Commitment	$ 1,150.0
Line of Credit Outstanding, Amount	$ 0.4	[1]
Weighted - Average Interest Rate	1.15%
OGE Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 550.0	[2]
Line of Credit Outstanding, Amount	$ 0.0	[1],[2]
Weighted - Average Interest Rate	0.00%	[2],[3]
Maturity	Dec. 17, 2027	[2],[4]
OGE Energy [Member] | Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 50.0	[5]
Line of Credit Outstanding, Amount	$ 0.0	[1],[5]
Weighted - Average Interest Rate	0.00%	[3],[5]
Maturity	May 24, 2025	[5]
OG&E [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	$ 550.0	[6],[7]
Letters of Credit Outstanding, Amount	$ 0.4	[1],[6],[7]
Weighted - Average Interest Rate	1.15%	[3],[6],[7]
Maturity	Dec. 17, 2027	[4],[6],[7]

[1] Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at March 31, 2023

[2] 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.

[3] Represents the weighted-average interest rate for the outstanding borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit.

[4] In December 2022, the Registrants each entered into an amendment to their credit facility that extended the term of each credit facility for one year, until December 2027. Further, each credit facility amendment gave each of the Registrants the option of extending such commitments for up to two additional one-year periods.

[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.

[6] 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 17, 2027. At March 31, 2023, there were no intercompany borrowings under this agreement.

[7] 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.