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REVENUE (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | $ 5,345.1 | $ 5,589.2 | $ 5,329.1
Other |  | 163.1 | 269.9 | 257.6
Revenues |  | 5,508.2 | 5,859.1 | 5,586.7
Evergy Kansas Central |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 2,645.2 | 2,983.7 | 2,705.2
Other |  | 53.2 | 72.2 | 142.1
Revenues |  | 2,698.4 | 3,055.9 | 2,847.3
Evergy Metro |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 1,780.4 | 1,774.5 | 1,799.7
Other |  | 108.6 | 196.1 | 114.0
Revenues |  | 1,889.0 | 1,970.6 | 1,913.7
Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 2,036.7 | 2,168.2 | 1,918.3
Residential | Evergy Kansas Central |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 821.0 | 980.1 | 824.1
Residential | Evergy Metro |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 748.4 | 746.4 | 691.9
Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 1,832.4 | 1,888.5 | 1,681.3
Commercial | Evergy Kansas Central |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 722.9 | 822.9 | 694.1
Commercial | Evergy Metro |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 778.9 | 758.6 | 713.3
Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 625.9 | 686.2 | 597.0
Industrial | Evergy Kansas Central |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 398.5 | 465.7 | 391.7
Industrial | Evergy Metro |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 130.9 | 127.0 | 122.0
Other retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 43.2 | (32.1) | 33.1
Deferral of revenues to regulatory liability for refund to customers for return on investment of retired Sibley Station | $ 68.0 |  | 68.0 |
Other retail | Evergy Kansas Central |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 18.1 | 17.9 | 17.1
Other retail | Evergy Metro |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 12.7 | 11.5 | 9.2
Total electric retail |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 4,538.2 | 4,710.8 | 4,229.7
Total electric retail | Evergy Kansas Central |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 1,960.5 | 2,286.6 | 1,927.0
Total electric retail | Evergy Metro |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 1,670.9 | 1,643.5 | 1,536.4
Wholesale |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 373.5 | 509.9 | 717.2
Wholesale | Evergy Kansas Central |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 296.8 | 389.9 | 453.1
Wholesale | Evergy Metro |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 91.9 | 111.9 | 242.6
Transmission |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 403.2 | 343.7 | 356.8
Transmission | Evergy Kansas Central |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 385.8 | 305.0 | 322.9
Transmission | Evergy Metro |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 14.3 | 18.2 | 17.1
Industrial steam and other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 30.2 | 24.8 | 25.4
Industrial steam and other | Evergy Kansas Central |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | 2.1 | 2.2 | 2.2
Industrial steam and other | Evergy Metro |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total revenue from contracts with customers |  | $ 3.3 | $ 0.9 | $ 3.6

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