XML 93 R63.htm IDEA: XBRL DOCUMENT v3.24.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Organization (Details)
customer in Millions, $ in Millions
 1 Months Ended 12 Months Ended
Nov. 30, 2023
USD ($)
MW
Dec. 31, 2022
USD ($)
Aug. 09, 2022
USD ($)
MW
Dec. 31, 2021
USD ($)
Oct. 01, 2021
USD ($)
May 31, 2023
USD ($)
Feb. 28, 2021
USD ($)
Dec. 31, 2023
customer
kilovolt_line
subsidiary
mi
MW
Dec. 31, 2022
USD ($)
Dec. 31, 2021
shares
Summary Of Accounting Policies [Line Items]                    
Owned generating capacity and renewable purchased power | MW               15,600    
Number of customers served | customer               1.7    
Antidilutive securities excluded from computation of earnings per share, amount | shares                   0
Asset Impairment Charges                 $ 26.7  
Increase of Natural Gas and Purchased Power Costs, Net Increase in Wholesale Revenues             $ 367.9      
Cash settlements under share forward agreement                 15.1  
Equity investment loss, net of derivative gain                 $ 16.3  
2022 Oklahoma Wind Farm Purchase                    
Summary Of Accounting Policies [Line Items]                    
Asset Acquisition, Price of Acquisition, Expected     $ 250.0              
ApproximateMWNameplateCapacity | MW     199              
Asset Acquisition, Consideration Transferred           $ 220.9        
2024 Natural Gas Plant Purchase                    
Summary Of Accounting Policies [Line Items]                    
Asset Acquisition, Price of Acquisition, Expected $ 60.0                  
ApproximateMWNameplateCapacity | MW 145                  
Evergy Kansas Central                    
Summary Of Accounting Policies [Line Items]                    
Increase of Natural Gas and Purchased Power Costs, Gross             134.3      
Increase of Energy Marketing Margins             94.5      
Prairie Wind Transmission, LLC                    
Summary Of Accounting Policies [Line Items]                    
Transmission line length | mi               108    
Transmission line electrical potential | kilovolt_line               345    
Evergy Missouri West                    
Summary Of Accounting Policies [Line Items]                    
Increase of Natural Gas and Purchased Power Costs, Gross             296.6      
Evergy Metro                    
Summary Of Accounting Policies [Line Items]                    
Increase in Wholesale Revenues             $ 63.0      
Transource Energy, LLC | Evergy Transmission Company LLC                    
Summary Of Accounting Policies [Line Items]                    
Ownership percentage               13.50%    
Prairie Wind Transmission, LLC | Evergy Kansas Central                    
Summary Of Accounting Policies [Line Items]                    
Ownership percentage               50.00%    
Early-Stage Energy Solution Company                    
Summary Of Accounting Policies [Line Items]                    
Initial Investment On Equity Investment         $ 3.7          
Unrealized Gain on Investments       $ 27.7            
Equity investment loss, net of derivative gain   $ 16.3                
Evergy Kansas South Inc | Evergy Kansas Central                    
Summary Of Accounting Policies [Line Items]                    
Number of active wholly owned subsidiaries | subsidiary               1    
AEP Transmission Holding Company, LLC | Transource Energy, LLC                    
Summary Of Accounting Policies [Line Items]                    
Ownership interest               86.50%