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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Fuel Inventory and Supplies (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Inventory [Line Items]
Fuel inventory	$ 257.3	$ 180.7
Supplies	518.9	492.2
Fuel inventory and supplies	776.2	672.9
Evergy Kansas Central
Inventory [Line Items]
Fuel inventory	138.6	97.2
Supplies	273.3	252.3
Fuel inventory and supplies	411.9	349.5
Evergy Metro
Inventory [Line Items]
Fuel inventory	81.5	59.0
Supplies	183.1	181.6
Fuel inventory and supplies	$ 264.6	$ 240.6

X

- Definition

Energy Related Inventory, Supplies

+ References

No definition available.

+ Details

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Balance Type:	debit
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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
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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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
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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