v3.26.1
ORGANIZATION AND BASIS OF PRESENTATION - Supplemental Cash Flow Information (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Cash paid for (received from):    
Interest, net of amount capitalized $ 310.6 $ 289.8
Income Taxes Paid, Net 0.3 4.3
Right-of-use assets obtained in exchange for new operating lease liabilities 16.1 12.9
Right-of-use assets obtained in exchange for new finance lease liabilities 10.3 21.8
Non-cash investing transactions:    
Property, plant and equipment additions 244.0 153.5
Non-cash financing transactions:    
Issuance of stock for compensation and reinvested dividends 5.1 2.6
Variable Interest Entities    
Non-cash financing transactions:    
Interest of VIEs 7.7 8.2
Evergy Kansas Central    
Cash paid for (received from):    
Interest, net of amount capitalized 117.5 112.3
Income Taxes Paid, Net 31.7 (1.9)
Right-of-use assets obtained in exchange for new operating lease liabilities 9.6 6.0
Right-of-use assets obtained in exchange for new finance lease liabilities 7.4 8.8
Non-cash investing transactions:    
Property, plant and equipment additions 117.4 89.5
Evergy Metro    
Cash paid for (received from):    
Interest, net of amount capitalized 80.2 76.8
Income Taxes Paid, Net 3.2 11.3
Right-of-use assets obtained in exchange for new operating lease liabilities 6.3 6.9
Right-of-use assets obtained in exchange for new finance lease liabilities 2.2 10.2
Non-cash investing transactions:    
Property, plant and equipment additions $ 53.2 $ 45.7