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v3.20.4

RATE MATTERS AND REGULATION (Tables) | 12 Months Ended
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Dec. 31, 2020
Regulated Operations [Abstract] |
Schedule of Regulatory Assets | The Evergy Companies' regulatory assets and liabilities are detailed in the following tables.
|  | December 31
|  | 2020 |  | 2019
|  | Evergy |  | Evergy Kansas Central |  | Evergy Metro |  | Evergy |  | Evergy Kansas Central |  | Evergy Metro
Regulatory Assets |  | (millions)
Pension and post-retirement costs |  | $ | 867.8 |  |  | $ | 412.9 |  |  | $ | 359.9 |  |  | $ | 795.9 |  |  | $ | 359.9 |  |  | $ | 330.7 |
Debt reacquisition costs |  | 98.9 |  |  | 91.3 |  |  | 6.8 |  |  | 105.8 |  |  | 97.3 |  |  | 7.5 |
Debt fair value adjustment |  | 104.0 |  |  | — |  |  | — |  |  | 112.0 |  |  | — |  |  | — |
Asset retirement obligations fair value adjustment |  | 116.2 |  |  | — |  |  | — |  |  | 114.3 |  |  | — |  |  | — |
Depreciation |  | 70.0 |  |  | 52.7 |  |  | 9.4 |  |  | 55.3 |  |  | 55.3 |  |  | — |
Cost of removal |  | 183.4 |  |  | 125.7 |  |  | 57.7 |  |  | 129.3 |  |  | 94.4 |  |  | 34.9 |
Asset retirement obligations |  | 170.8 |  |  | 55.0 |  |  | 84.0 |  |  | 167.1 |  |  | 52.8 |  |  | 79.4 |
Analog meter unrecovered investment |  | 24.1 |  |  | 24.1 |  |  | — |  |  | 29.9 |  |  | 29.9 |  |  | — |
Treasury yield hedges |  | 21.5 |  |  | 21.5 |  |  | — |  |  | 22.6 |  |  | 22.6 |  |  | — |
Iatan No. 1 and common facilities |  | 6.9 |  |  | — |  |  | 2.8 |  |  | 7.1 |  |  | — |  |  | 2.8 |
Iatan No. 2 construction accounting costs |  | 25.4 |  |  | — |  |  | 12.7 |  |  | 26.1 |  |  | — |  |  | 13.1 |
Kansas property tax surcharge |  | 28.9 |  |  | 23.7 |  |  | 5.2 |  |  | 21.7 |  |  | 18.7 |  |  | 3.0 |
Disallowed plant costs |  | 14.5 |  |  | 14.5 |  |  | — |  |  | 14.8 |  |  | 14.8 |  |  | — |
La Cygne environmental costs |  | 12.4 |  |  | 10.1 |  |  | 2.3 |  |  | 13.7 |  |  | 11.2 |  |  | 2.5 |
Deferred customer programs |  | 16.3 |  |  | 5.7 |  |  | 8.6 |  |  | 18.0 |  |  | 6.2 |  |  | 8.3 |
Fuel recovery mechanisms |  | 26.2 |  |  | 1.2 |  |  | 17.7 |  |  | 34.7 |  |  | — |  |  | 16.6 |
Solar rebates |  | 25.9 |  |  | — |  |  | 1.5 |  |  | 39.8 |  |  | — |  |  | 9.0 |
Wolf Creek outage |  | 10.0 |  |  | 5.0 |  |  | 5.0 |  |  | 31.0 |  |  | 15.5 |  |  | 15.5 |
Pension and other post-retirement benefit non-service costs |  | 49.8 |  |  | 12.8 |  |  | 23.4 |  |  | 31.8 |  |  | 7.4 |  |  | 15.6 |
Retired generation facilities |  | 128.4 |  |  | — |  |  | — |  |  | 130.5 |  |  | — |  |  | — |
Merger transition costs |  | 37.6 |  |  | 18.0 |  |  | 13.9 |  |  | 42.3 |  |  | 20.3 |  |  | 15.6 |
Other regulatory assets |  | 35.4 |  |  | 22.1 |  |  | 4.6 |  |  | 28.5 |  |  | 17.4 |  |  | 5.3 |
Total |  | 2,074.4 |  |  | 896.3 |  |  | 615.5 |  |  | 1,972.2 |  |  | 823.7 |  |  | 559.8 |
Less: current portion |  | (206.2) |  |  | (96.2) |  |  | (82.0) |  |  | (231.7) |  |  | (93.3) |  |  | (95.4) |
Total noncurrent regulatory assets |  | $ | 1,868.2 |  |  | $ | 800.1 |  |  | $ | 533.5 |  |  | $ | 1,740.5 |  |  | $ | 730.4 |  |  | $ | 464.4 |
Schedule of Regulatory Liabilities |
|  | December 31
|  | 2020 |  | 2019
|  | Evergy |  | Evergy Kansas Central |  | Evergy Metro |  | Evergy |  | Evergy Kansas Central |  | Evergy Metro
Regulatory Liabilities |  | (millions)
Taxes refundable through future rates |  | $ | 2,055.7 |  |  | $ | 1,184.5 |  |  | $ | 650.2 |  |  | $ | 1,656.5 |  |  | $ | 856.4 |  |  | $ | 568.9 |
Deferred regulatory gain from sale leaseback |  | 48.1 |  |  | 48.1 |  |  | — |  |  | 53.6 |  |  | 53.6 |  |  | — |
Emission allowances |  | 46.1 |  |  | — |  |  | 46.1 |  |  | 50.1 |  |  | — |  |  | 50.1 |
Nuclear decommissioning |  | 319.7 |  |  | 138.2 |  |  | 181.5 |  |  | 267.3 |  |  | 116.5 |  |  | 150.8 |
Pension and post-retirement costs |  | 50.8 |  |  | 31.4 |  |  | 13.1 |  |  | 59.3 |  |  | 31.5 |  |  | 20.3 |
Jurisdictional allowance for funds used during construction |  | 28.7 |  |  | 27.0 |  |  | 1.7 |  |  | 28.7 |  |  | 28.7 |  |  | — |
La Cygne leasehold dismantling costs |  | 29.6 |  |  | 29.6 |  |  | — |  |  | 29.6 |  |  | 29.6 |  |  | — |
Cost of removal |  | 4.4 |  |  | — |  |  | — |  |  | 49.1 |  |  | — |  |  | — |
Kansas tax credits |  | — |  |  | — |  |  | — |  |  | 17.0 |  |  | 17.0 |  |  | — |
Purchase power agreement |  | 6.3 |  |  | 6.3 |  |  | — |  |  | 7.4 |  |  | 7.4 |  |  | — |
Fuel recovery mechanisms |  | 1.3 |  |  | — |  |  | — |  |  | 34.1 |  |  | 30.2 |  |  | — |
Sibley AAO |  | 18.4 |  |  | — |  |  | — |  |  | 10.2 |  |  | — |  |  | — |
Other regulatory liabilities |  | 55.8 |  |  | 7.8 |  |  | 14.8 |  |  | 48.7 |  |  | 3.9 |  |  | 13.5 |
Total |  | 2,664.9 |  |  | 1,472.9 |  |  | 907.4 |  |  | 2,311.6 |  |  | 1,174.8 |  |  | 803.6 |
Less: current portion |  | (26.1) |  |  | (11.9) |  |  | (8.0) |  |  | (63.3) |  |  | (42.3) |  |  | (11.4) |
Total noncurrent regulatory liabilities |  | $ | 2,638.8 |  |  | $ | 1,461.0 |  |  | $ | 899.4 |  |  | $ | 2,248.3 |  |  | $ | 1,132.5 |  |  | $ | 792.2 |

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