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MERGER OF GREAT PLAINS ENERGY AND EVERGY KANSAS CENTRAL - Schedule Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Jun. 04, 2018
Business Acquisition [Line Items]      
Goodwill $ 2,336.6 $ 2,336.6  
Great Plains Energy      
Business Acquisition [Line Items]      
Current assets     $ 2,151.7
Property, plant and equipment, net     9,179.7
Goodwill     2,336.6
Other long-term assets, excluding goodwill     1,235.9
Total assets     14,903.9
Current liabilities     1,673.9
Long-term liabilities, excluding long-term debt     2,895.7
Long-term debt, net     3,358.6
Total liabilities     7,928.2
Total purchase price     $ 6,975.7