Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI https://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI https://asc.fasb.org/extlink&oid=126734703&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

LONG-TERM DEBT - Narrative (Details) - USD ($) $ in Millions	Apr. 30, 2023	Mar. 31, 2023
Debt Instrument [Line Items]
Interest rate		5.06%
Senior Notes \| Series Notes Due 2023 EM
Debt Instrument [Line Items]
Long-term debt gross		$ 300.0
Interest rate		3.15%
Commercial Paper \| Commercial Paper Classified As Long Term Debt
Debt Instrument [Line Items]
Long-term debt gross		$ 297.7
Evergy Kansas Central \| Secured Debt \| Mortgage Bonds Due 2053 EKC
Debt Instrument [Line Items]
Long-term debt gross		$ 400.0
Interest rate		5.70%
Evergy Metro \| Subsequent Event \| Secured Debt \| Mortgage Bonds Due 2033 EM
Debt Instrument [Line Items]
Long-term debt gross	$ 300.0
Interest rate	4.95%