Rate Matters and Regulation - Additional Information (Details) - USD ($)				1 Months Ended
	May 15, 2025	Nov. 26, 2024	Jun. 12, 2024	Dec. 31, 2023	Jun. 30, 2025
CWIP incentive and abandoned plant incentive cost	$ 242,000,000
Estimated Refund to SPP					$ 14,000,000
Requested Recovery of Capital Investment				$ 1,300,000,000
OKLAHOMA [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount		$ 126,700,000	$ 126,700,000	$ 332,500,000
Public Utilities, Requested Return on Equity, Percentage		9.50%		10.50%
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
Impact to Company [Member]
Estimated Refund to SPP					4,000,000
Customer Impact [Member]
Estimated Refund to SPP					$ 10,000,000