ORGANIZATION AND BASIS OF PRESENTATION - Organization (Details) customer in Millions, $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2024 USD ($) MW	Mar. 31, 2024 segment customer kilovolt_line subsidiary mi MW
Summary Of Accounting Policies [Line Items]
Owned generating capacity and renewable purchased power		15,800
Number of customers served | customer		1.7
Number of segments | segment		1
2024 Natural Gas Plant Purchase | Subsequent Event
Summary Of Accounting Policies [Line Items]
ApproximateMWNameplateCapacity	145
Asset Acquisition, Consideration Transferred | $	$ 60.0
Dogwood costs recovery period	2 years
Prairie Wind Transmission, LLC
Summary Of Accounting Policies [Line Items]
Transmission line length | mi		108
Transmission line electrical potential | kilovolt_line		345
Evergy Kansas South Inc | Evergy Kansas Central
Summary Of Accounting Policies [Line Items]
Number of active wholly owned subsidiaries | subsidiary		1
Transource Energy, LLC | Evergy Transmission Company LLC
Summary Of Accounting Policies [Line Items]
Ownership percentage		13.50%
Transource Energy, LLC | AEP Transmission Holding Company, LLC
Summary Of Accounting Policies [Line Items]
Ownership interest		86.50%
Prairie Wind Transmission, LLC | Evergy Kansas Central
Summary Of Accounting Policies [Line Items]
Ownership percentage		50.00%