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Rate Matters and Regulation - Additional Information (Details) - USD ($)
 1 Months Ended
Nov. 26, 2024
Jun. 12, 2024
Dec. 31, 2023
Mar. 31, 2025
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