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VARIABLE INTEREST ENTITIES - Narrative (Details) | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 31, 2019 | Jul. 31, 2017 | Mar. 31, 2019 | Dec. 31, 2020
Jeffrey Energy Center |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE ownership percentage | 8.00% | 8.00% | 8.00% | 8.00%
La Cygne Unit 2 [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE ownership percentage |  |  |  | 50.00%
Evergy Kansas Central | Jeffrey Energy Center |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE ownership percentage | 8.00% |  |  |
Evergy Kansas Central | La Cygne Unit 2 [Member] |  |  |  |
Variable Interest Entity [Line Items] |  |  |  |
VIE ownership percentage |  |  |  | 50.00%

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- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121559654&loc=SL6759159-111685 + Details
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