Cover Page Cover Page
| Cover Page Cover Page | Aug. 05, 2020 |
| Entity Information [Line Items] | |
| Entity Central Index Key | 0001711269 |
| Document Type | 8-K |
| Document Period End Date | Aug. 5, 2020 |
| Entity Registrant Name | Evergy, Inc. |
| Entity Incorporation, State or Country Code | MO |
| Entity File Number | 001-38515 |
| Entity Tax Identification Number | 82-2733395 |
| 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 |
| Entity Emerging Growth Company | false |
| Title of 12(b) Security | Evergy, Inc. common stock |
| Trading Symbol | EVRG |
| Security Exchange Name | NYSE |
| Amendment Flag | false |
| Evergy Kansas Central Inc [Member] | |
| Entity Information [Line Items] | |
| Entity Central Index Key | 0000054507 |
| Entity Registrant Name | Evergy Kansas Central, Inc |
| Entity Incorporation, State or Country Code | KS |
| Entity File Number | 001-03523 |
| Entity Tax Identification Number | 48-0290150 |
| Entity Address, Address Line One | 818 South Kansas Avenue |
| Entity Address, City or Town | Topeka |
| Entity Address, State or Province | KS |
| Entity Address, Postal Zip Code | 66612 |
| City Area Code | 785 |
| Local Phone Number | 575-6300 |
| Evergy Metro Inc [Member] | |
| Entity Information [Line Items] | |
| Entity Central Index Key | 0000054476 |
| Entity Registrant Name | Evergy Metro, Inc. |
| Entity Incorporation, State or Country Code | MO |
| Entity File Number | 000-51873 |
| Entity Tax Identification Number | 44-0308720 |
| 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 |