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ASSET RETIREMENT OBLIGATIONS (Tables) | 12 Months Ended
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Dec. 31, 2020
Asset Retirement Obligation Disclosure [Abstract] |
Schedule of Change in Asset Retirement Obligation | The following table summarizes the change in the Evergy Companies' AROs for the periods ending December 31, 2020 and 2019.
|  | Evergy |  |  | Evergy Kansas Central |  |  | Evergy Metro |
|  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
|  | (millions) |
Beginning balance January 1 |  | $ | 674.1 |  |  |  | $ | 687.1 |  |  |  | $ | 272.9 |  |  |  | $ | 281.1 |  |  |  | $ | 253.6 |  |  |  | $ | 261.0 |  |
Revision in timing and/or estimates |  | 249.3 |  |  |  | (22.3) |  |  |  | 136.8 |  |  |  | (12.4) |  |  |  | 118.4 |  |  |  | (9.9) |  |
Settlements |  | (18.4) |  |  |  | (17.8) |  |  |  | (2.2) |  |  |  | (14.8) |  |  |  | (7.5) |  |  |  | (2.5) |  |
Accretion |  | 36.9 |  |  |  | 27.1 |  |  |  | 19.7 |  |  |  | 19.0 |  |  |  | 14.4 |  |  |  | 5.0 |  |
Ending balance |  | $ | 941.9 |  |  |  | $ | 674.1 |  |  |  | $ | 427.2 |  |  |  | $ | 272.9 |  |  |  | $ | 378.9 |  |  |  | $ | 253.6 |  |
Less: current portion |  | (40.2) |  |  |  | (71.3) |  |  |  | (11.2) |  |  |  | (23.3) |  |  |  | (21.2) |  |  |  | (36.1) |  |
Total noncurrent asset retirement obligation |  | $ | 901.7 |  |  |  | $ | 602.8 |  |  |  | $ | 416.0 |  |  |  | $ | 249.6 |  |  |  | $ | 357.7 |  |  |  | $ | 217.5 |  |

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- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6393242&loc=d3e13201-110859 + Details
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