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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Organization (Details) customer in Millions | 12 Months Ended
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Dec. 31, 2020 kilovolt_line subsidiary customer mi MW
Summary Of Accounting Policies [Line Items] |
Owned generating capacity and renewable purchased power | MW | 15,400
Number of customers served | customer | 1.6
Prairie Wind Transmission, LLC |
Summary Of Accounting Policies [Line Items] |
Transmission line length | mi | 108
Transmission line electrical potential | kilovolt_line | 345
Transource Energy, LLC | Evergy Transmission Company LLC |
Summary Of Accounting Policies [Line Items] |
Ownership percentage | 13.50%
Prairie Wind Transmission, LLC | Evergy Kansas Central |
Summary Of Accounting Policies [Line Items] |
Ownership percentage | 50.00%
Evergy Kansas South Inc | Evergy Kansas Central |
Summary Of Accounting Policies [Line Items] |
Number of active wholly owned subsidiaries | subsidiary | 1
AEP Transmission Holding Company, LLC | Transource Energy, LLC |
Summary Of Accounting Policies [Line Items] |
Ownership interest | 86.50%

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Details
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- Details
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