SHORT-TERM BORROWINGS AND SHORT-TERM BANK LINES OF CREDIT - Narrative (Details) $ in Millions	Mar. 31, 2024 USD ($)
Short-term Debt [Line Items]
Interest rate	5.06%
Cash Borrowings
Short-term Debt [Line Items]
Line of credit, maximum borrowing capacity	$ 2,500.0
Debt instrument, debt default, threshold	$ 100.0
Debt Instrument, debt to capitalization ratio (no more than)	65.00%
Commercial Paper
Short-term Debt [Line Items]
Commercial paper classified as long term debt	$ 292.8
Evergy Kansas Central \| Cash Borrowings
Short-term Debt [Line Items]
Debt instrument, debt default, threshold	$ 100.0
Debt Instrument, debt to capitalization ratio (no more than)	65.00%
Evergy Metro \| Cash Borrowings
Short-term Debt [Line Items]
Debt instrument, debt default, threshold	$ 100.0
Debt Instrument, debt to capitalization ratio (no more than)	65.00%
Evergy Metro \| Commercial Paper
Short-term Debt [Line Items]
Commercial paper classified as long term debt	$ 292.8
Evergy Missouri West \| Cash Borrowings
Short-term Debt [Line Items]
Debt instrument, debt default, threshold	$ 100.0
Debt Instrument, debt to capitalization ratio (no more than)	65.00%

Commercial paper classified as long term debt

No definition available.

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Namespace Prefix:	evrg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Covenant, Debt to Capitalization Ratio, Maximum

+ References

No definition available.

+ Details

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- Definition

Debt Instrument, Debt Default, Threshold

+ References

No definition available.

+ Details

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Namespace Prefix:	evrg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1B
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481139/470-20-50-1B

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1

+ Details

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Balance Type:	credit
Period Type:	instant

- 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.

+ Details

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Period Type:	duration

- Details

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- Details

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- Details

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- Details

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- Details

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