Rate Matters and Regulation - Additional Information (Details) - USD ($)												1 Months Ended		6 Months Ended	12 Months Ended
	Feb. 01, 2023	Dec. 29, 2022	Oct. 03, 2022	Sep. 29, 2022	Sep. 08, 2022	Aug. 01, 2022	Jul. 05, 2022	Jul. 01, 2022	May 18, 2022	Feb. 01, 2022	Apr. 01, 2021	Jan. 31, 2023	Dec. 31, 2021	Jun. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Jul. 31, 2022
Amortize and recovery of extraordinary fuel costs period											10 years
Pre-tax rate of return percentage											6.60%
Public Utilities, Requested Rate Increase (Decrease), Amount					$ 30,000,000.0			$ 30,000,000.0
Recovery of regulatory asset period							10 years
Public Utilities, Approved Return on Equity, Percentage									9.50%
Repayment of securitization bonds period						28 years
Estimated Refund to SPP															$ 13,000,000.0
Regulatory assets													$ 1,230,800,000		524,300,000	$ 1,230,800,000
Securitization Authorization Requested													760,000,000.0
Securitization Authorization Granted																	$ 750,000,000
Plan Investments for Customers															28,000,000.0
Requested Recovery of Capital Investment															1,200,000,000
Common Equity Percentage which ROE is based					53.37%
Annualized filing year revenues percentage														4.00%
Increase (Decrease) in Regulatory Clause Revenue				$ 424,000,000.0
Subsequent Event [Member]
Pre-tax weighted average cost of capital percentage												6.49%
Recovery of regulatory asset period												10 years
Minimum [Member]
Lost Revenue on Plant Investments for Customers															16,200,000
Maximum [Member]
Lost Revenue on Plant Investments for Customers															63,900,000
In Favor Cooperatives [Member]
Plan Investments for Customers															11,700,000
In Favor Cooperatives [Member] | Minimum [Member]
Lost Revenues on Plant Investments for Customers															4,400,000
In Favor Cooperatives [Member] | Maximum [Member]
Lost Revenues on Plant Investments for Customers															7,900,000
Impact to Company [Member]
Estimated Refund to SPP															5,000,000.0
Customer Impact [Member]
Estimated Refund to SPP															$ 8,000,000.0
Oklahoma Corporation Commission [Member]
OG&E's Jurisdictional Revenues															88.00%
Arkansas Public Service Commission [Member]
OG&E's Jurisdictional Revenues															8.00%
Federal Energy Regulatory Commission [Member]
OG&E's Jurisdictional Revenues															4.00%
OKLAHOMA
Public Utilities, Requested Rate Increase (Decrease), Amount													$ 163,500,000
Public Utilities, Requested Return on Equity, Percentage													10.20%
Public Utilities, Approved Return on Equity, Percentage															9.50%
State corporate income tax adjustment rate														4.00%		6.00%
Common Equity Percentage which ROE is based													53.37%
ARKANSAS
Public Utilities, Approved Rate Increase (Decrease), Amount			$ 8,500,000							$ 4,200,000
Increase (decrease) in revenue requirement rose amount		$ 9,600,000	$ 9,600,000
ARKANSAS | Subsequent Event [Member]
Increase (decrease) in revenue requirement rose amount	$ 9,600,000
Winter Storm Uri Costs [Member] | OKLAHOMA
Regulatory assets													$ 747,900,000		$ 0	$ 747,900,000
Winter Storm Uri Costs [Member] | ARKANSAS
Regulatory assets													$ 88,900,000		78,200,000	$ 88,900,000
Grid Enhancement
Costs recovery of program implemented															$ 6,000,000.0