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PROPERTY, PLANT AND EQUIPMENT (Tables) | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Schedule of Public Utility Property, Plant, and Equipment | The following tables summarize the property, plant and equipment of Evergy, Evergy Kansas Central and Evergy Metro.
December 31, 2020 |  | Evergy |  | Evergy Kansas Central |  | Evergy Metro
|  |  | (millions) |
Electric plant in service |  |  | $ | 28,914.8 |  |  |  |  | $ | 14,095.1 |  |  |  |  | $ | 11,161.8 |  |
Electric plant acquisition adjustment |  |  | 724.3 |  |  |  |  | 724.3 |  |  |  |  | — |  |
Accumulated depreciation |  |  | (10,998.4) |  |  |  |  | (5,293.5) |  |  |  |  | (4,532.7) |  |
Plant in service |  |  | 18,640.7 |  |  |  |  | 9,525.9 |  |  |  |  | 6,629.1 |  |
Construction work in progress |  |  | 1,153.5 |  |  |  |  | 589.1 |  |  |  |  | 433.9 |  |
Nuclear fuel, net |  |  | 155.9 |  |  |  |  | 77.7 |  |  |  |  | 78.2 |  |
Plant to be retired, net (a) |  |  | 0.9 |  |  |  |  | 0.9 |  |  |  |  | — |  |
Net property, plant and equipment |  |  | $ | 19,951.0 |  |  |  |  | $ | 10,193.6 |  |  |  |  | $ | 7,141.2 |  |
December 31, 2019 |  | Evergy |  | Evergy Kansas Central |  | Evergy Metro
|  |  | (millions) |
Electric plant in service |  |  | $ | 27,768.8 |  |  |  |  | $ | 13,538.1 |  |  |  |  | $ | 10,776.5 |  |
Electric plant acquisition adjustment |  |  | 740.6 |  |  |  |  | 740.6 |  |  |  |  | — |  |
Accumulated depreciation |  |  | (10,293.7) |  |  |  |  | (4,951.5) |  |  |  |  | (4,272.0) |  |
Plant in service |  |  | 18,215.7 |  |  |  |  | 9,327.2 |  |  |  |  | 6,504.5 |  |
Construction work in progress |  |  | 839.2 |  |  |  |  | 472.8 |  |  |  |  | 269.9 |  |
Nuclear fuel, net |  |  | 128.5 |  |  |  |  | 63.9 |  |  |  |  | 64.6 |  |
Plant to be retired, net (a) |  |  | 1.0 |  |  |  |  | 1.0 |  |  |  |  | — |  |
Net property, plant and equipment |  |  | $ | 19,184.4 |  |  |  |  | $ | 9,864.9 |  |  |  |  | $ | 6,839.0 |  |
(a) As of December 31, 2020 and 2019, represents the planned retirement of Evergy Kansas Central analog meters prior to the end of their remaining useful lives. The following table summarizes the property, plant and equipment of VIEs for Evergy and Evergy Kansas Central.
|  |  | December 31 |
|  | 2020 |  | 2019
|  |  | (millions) |
Electric plant of VIEs |  |  | $ | 392.1 |  |  |  |  | $ | 392.1 |  |
Accumulated depreciation of VIEs |  |  | (237.2) |  |  |  |  | (230.1) |  |
Net property, plant and equipment of VIEs |  |  | $ | 154.9 |  |  |  |  | $ | 162.0 |  |
The Evergy Companies' depreciation expense is detailed in the following table.
|  | 2020 |  | 2019 |  | 2018
|  | (millions)
Evergy (a) |  | $ | 804.7 |  |  | $ | 786.3 |  |  | $ | 567.9 |
Evergy Kansas Central (a) |  | 435.1 |  |  | 425.8 |  |  | 371.3 |
Evergy Metro (b) |  | 269.5 |  |  | 262.7 |  |  | 235.3 |
(a) Approximately $7.1 million of depreciation expense in each of 2020, 2019 and 2018 was attributable to property, plant and equipment of VIEs. (b) Evergy Metro amounts are only included in consolidated Evergy from June 4, 2018, the date of the closing of the merger, and thereafter.

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- Definition Tabular disclosure of public utility physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, deprecation expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 980 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84167750&loc=d3e42232-110370 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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