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ORGANIZATION AND BASIS OF PRESENTATION - Fuel Inventory and Supplies (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Inventory [Line Items]
Fuel inventory	$ 224.3	$ 180.7
Supplies	499.8	492.2
Fuel inventory and supplies	724.1	672.9
Evergy Kansas Central
Inventory [Line Items]
Fuel inventory	111.1	97.2
Supplies	258.7	252.3
Fuel inventory and supplies	369.8	349.5
Evergy Metro
Inventory [Line Items]
Fuel inventory	78.9	59.0
Supplies	179.2	181.6
Fuel inventory and supplies	$ 258.1	$ 240.6

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- Definition

Energy Related Inventory, Supplies

+ References

No definition available.

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- Definition

Carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies relating to a source of usable power held for future sale or future use in manufacturing or production process.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

Carrying amount as of the balance sheet date of coal, which is a combustible rock or minerals which are extracted from the ground and used as fuel.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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