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Document and Entity Information
Apr. 20, 2021
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001711269
Document Type 8-K
Document Period End Date Apr. 20, 2021
Entity File Number 001-38515
Entity Registrant Name Evergy, Inc.
Entity Tax Identification Number 82-2733395
Entity Incorporation State Country Code MO
Entity Address, Address Line One 1200 Main Street
Entity Address, City or Town Kansas City
Entity Address, State or Province MO
Entity Address, Postal Zip Code 64105
City Area Code 816
Local Phone Number 556-2200
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Evergy, Inc. common stock
Trading Symbol EVRG
Security Exchange Name NYSE
Entity Emerging Growth Company false