Stock-Based Compensation - Share-based Compensation, Activity (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity Instruments Other than Options, Forfeited in Period		(8,009)
Total Shareholder Return [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		213,442	216,437	249,909
Total Shareholder Return [Member] | Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		65,069	60,923	68,720
Performance Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Beginning Balance		608,375
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	[1]	213,442
Equity Instruments Other than Options, Converted in Period	[2]	(161,690)
Equity Instruments Other than Options, Vested in Period		(234,672)
Equity Instruments Other than Options, Forfeited in Period		(8,009)
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		652,118	608,375
Awards Other than Options, Fully Vested	[3]	234,672
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value		$ 3.7
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value		28.8
Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested		$ 12.7
Performance Units [Member] | Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Beginning Balance		170,623
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	[1]	65,069
Equity Instruments Other than Options, Converted in Period	[2]	(44,550)
Equity Instruments Other than Options, Vested in Period		(63,506)
Equity Instruments Other than Options, Forfeited in Period		(5,889)
Equity Other Than Options, Employee Migration	[4]	(1,416)
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		183,837	170,623
Awards Other than Options, Fully Vested	[3]	63,506
Equity Instruments Other than Options, Converted, Aggregrate Intrinsic Value		$ 1.0
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value		8.0
Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested		$ 3.4
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Beginning Balance		189,483
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		114,926	116,539	89,197
Equity Instruments Other than Options, Vested in Period		(76,664)
Equity Instruments Other than Options, Forfeited in Period		(4,599)
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		223,146	189,483
Equity Instruments Other than Options, Vested, Aggregrate Intrinsic Value		$ 2.7
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value		$ 7.8
Restricted Stock [Member] | Og and E [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Beginning Balance		52,759
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted		35,034	32,804	22,911
Equity Instruments Other than Options, Vested in Period		(20,265)
Equity Instruments Other than Options, Forfeited in Period		(2,725)
Equity Other Than Options, Employee Migration	[4]	(559)
Share-Based Compensation Arrangement by Share-Based Payment Award, Non-Option Equity Instruments, Outstanding, Number, Ending Balance		64,244	52,759
Equity Instruments Other than Options, Vested, Aggregrate Intrinsic Value		$ 0.7
Equity Instruments Other than Options, Outstanding, Aggregrate Intrinsic Value		$ 2.2

[1] For performance units, this represents the target number of performance units granted. Actual number of performance units earned, if any, is dependent upon performance and may range from zero percent to 200 percent of the target.

[2] These amounts represent performance units that vested at December 31, 2022, which were settled in February 2023.

[3] These amounts represent performance units that vested at December 31, 2023. Actual expected amounts to be paid out in 2024 will differ based on the percentage at which the performance metric was met and are dependent upon Compensation Committee approval.

[4] Due to certain employees transferring between OG&E and OGE Energy.