Credit Facilities and Short-Term Debt - Schedule of Line of Credit Facilities (Parenthetical) (Details)		6 Months Ended
		Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,160,000,000
Line of credit outstanding borrowing amount	[1]	534,900,000
Og and E [Member]
Line of Credit Facility [Line Items]
Intercompany Borrowing Agreement - Maximum Borrowing Capacity		450,000,000
Line of Credit Facility, Current Borrowing Capacity	[2],[3]	550,000,000
Advances from parent		0	$ 247,600,000
Advances to parent		$ 42,300,000	$ 0
Credit facility termination date	[2],[3]	Dec. 18, 2029
OGE Energy [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	[4]	$ 550,000,000
Line of credit outstanding borrowing amount	[1],[4]	$ 534,500,000
Credit facility termination date	[4]	Dec. 18, 2029
OGE Energy [Member] | Series Due May 24, 2027 [Member]
Line of Credit Facility [Line Items]
Long term debt		$ 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
OGE Energy [Member] | Credit Facility [Member] | Series Due May 24, 2027 [Member]
Line of Credit Facility [Line Items]
Long term debt		$ 60,000,000
OGE Energy [Member] | Term Loan [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Current Borrowing Capacity	[5]	60,000,000
Line of credit outstanding borrowing amount	[1],[5]	$ 0
Credit facility termination date	[5]	May 24, 2027
OGE Energy [Member] | Term Loan [Member] | Series Due May 24, 2027 [Member]
Line of Credit Facility [Line Items]
Long term debt		$ 60,000,000

[1] Includes direct borrowings under the revolving credit agreements, commercial paper borrowings and letters of credit at June 30, 2025. Typically, OGE Energy issues commercial paper to address consolidated operational activity, and OG&E will borrow from OGE Energy under the intercompany borrowing agreement as discussed below in footnote (E).

[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 June 30, 2025, there was $42.3 million in advances to parent, and there were no borrowings under the intercompany borrowing 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.