v3.26.1
SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT - Schedule of Short Term Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Short-term Debt [Line Items]    
Master Credit Facility $ 3,500.0 $ 2,500.0
Available Borrowings Capacity 1,648.4 1,102.2
Evergy, Inc.    
Short-term Debt [Line Items]    
Master Credit Facility 750.0 700.0
Available Borrowings Capacity $ 513.5 $ 199.1
Weighted Average Interest Rate on Short-Term Borrowings 3.88% 3.91%
Evergy Kansas Central    
Short-term Debt [Line Items]    
Master Credit Facility $ 1,000.0 $ 800.0
Available Borrowings Capacity $ 394.0 $ 476.1
Weighted Average Interest Rate on Short-Term Borrowings 4.01% 3.96%
Evergy Metro    
Short-term Debt [Line Items]    
Master Credit Facility $ 1,000.0 $ 500.0
Available Borrowings Capacity $ 537.4 $ 253.6
Weighted Average Interest Rate on Short-Term Borrowings 3.98% 3.85%
Evergy Missouri West    
Short-term Debt [Line Items]    
Master Credit Facility $ 750.0 $ 500.0
Available Borrowings Capacity $ 203.5 $ 173.4
Weighted Average Interest Rate on Short-Term Borrowings 4.21% 4.06%
Commercial Paper    
Short-term Debt [Line Items]    
Line of credit $ 1,831.0 $ 1,394.0
Commercial Paper | Evergy, Inc.    
Short-term Debt [Line Items]    
Line of credit 235.8 500.2
Commercial Paper | Evergy Kansas Central    
Short-term Debt [Line Items]    
Line of credit 591.4 321.9
Commercial Paper | Evergy Metro    
Short-term Debt [Line Items]    
Line of credit 457.3 245.3
Commercial Paper | Evergy Missouri West    
Short-term Debt [Line Items]    
Line of credit 546.5 326.6
Letters of Credit    
Short-term Debt [Line Items]    
Letters of Credit 20.6 3.8
Letters of Credit | Evergy, Inc.    
Short-term Debt [Line Items]    
Letters of Credit 0.7 0.7
Letters of Credit | Evergy Kansas Central    
Short-term Debt [Line Items]    
Letters of Credit 14.6 2.0
Letters of Credit | Evergy Metro    
Short-term Debt [Line Items]    
Letters of Credit 5.3 1.1
Letters of Credit | Evergy Missouri West    
Short-term Debt [Line Items]    
Letters of Credit 0.0 0.0
Cash Borrowings    
Short-term Debt [Line Items]    
Line of credit 0.0 0.0
Cash Borrowings | Evergy, Inc.    
Short-term Debt [Line Items]    
Line of credit 0.0 0.0
Cash Borrowings | Evergy Kansas Central    
Short-term Debt [Line Items]    
Line of credit 0.0 0.0
Cash Borrowings | Evergy Metro    
Short-term Debt [Line Items]    
Line of credit 0.0 0.0
Cash Borrowings | Evergy Missouri West    
Short-term Debt [Line Items]    
Line of credit $ 0.0 $ 0.0