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Rate Matters and Regulation - Additional Information (Details)						1 Months Ended		12 Months Ended
	Dec. 31, 2026 Megawattsday	Nov. 26, 2024 USD ($)	Jun. 12, 2024 USD ($)	Mar. 07, 2024 USD ($)	Jan. 19, 2024 Megawattsday	Dec. 31, 2023 USD ($)	Jan. 31, 2023	Dec. 31, 2028 Megawattsday	Dec. 31, 2027 Megawattsday	Dec. 31, 2024 USD ($)
Pre-tax weighted average cost of capital percentage							6.49%
Recovery of regulatory asset period							10 years
Estimated Refund to SPP										$ 14,000,000
Requested Recovery of Capital Investment						$ 1,300,000,000
Integrated Resource Plans [Member] | Forecast [Member]
Energy generation capacity | Megawattsday	556							1,096	431
Oklahoma Corporation Commission [Member]
OG&E's Jurisdictional Revenues										87.00%
Arkansas Public Service Commission [Member]
OG&E's Jurisdictional Revenues										8.00%
Public Utilities, Approved Rate Increase (Decrease), Amount				$ 3,500,000
Federal Energy Regulatory Commission [Member]
OG&E's Jurisdictional Revenues										5.00%
Arkansas 2024 Generation Construction Notice Filing
Energy generation capacity | Megawattsday					96
Maximum [Member]
Vegetation management operation and maintenance expenses										$ 38,200,000
Regulatory asset										7,500,000
Impact to Company [Member]
Estimated Refund to SPP										4,000,000
Customer Impact [Member]
Estimated Refund to SPP										$ 10,000,000
OKLAHOMA [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount						$ 332,500,000
Public Utilities, Requested Return on Equity, Percentage		9.50%				10.50%
Public Utilities, Approved Rate Increase (Decrease), Amount		$ 126,700,000	$ 126,700,000
Common Equity Percentage which ROE is based		53.50%				53.50%
Total level of expense less than or greater than amount of annual base level of expense		$ 38,200,000
OKLAHOMA [Member] | Maximum [Member]
Vegetation management operation and maintenance expenses		38,200,000
Regulatory asset		$ 7,500,000

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 980
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478742/980-340-50-1

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