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Cover - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2023
Feb. 15, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-37415    
Entity Registrant Name Evolent Health, Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 32-0454912    
Entity Address, Address Line One 1812 N. Moore Street    
Entity Address, Address Line Two Suite 1705    
Entity Address, City or Town Arlington    
Entity Address, State or Province VA    
Entity Address, Postal Zip Code 22209    
City Area Code 571    
Local Phone Number 389-6000    
Title of 12(b) Security Class A Common Stock of Evolent Health, Inc., par value $0.01 per share    
Trading Symbol EVH    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 3.4
Entity Common Stock, Shares Outstanding (in shares)   115,430,107  
Documents Incorporated by Reference
Selected portions of the Proxy Statement for the Annual Meeting of Shareholders, scheduled for June 6, 2024, have been incorporated by reference into Part III of this Form 10-K to the extent stated herein. Such proxy statement will be filed with the Securities and Exchange Commission within 120 days of the registrant’s fiscal year ended December 31, 2023.
    
Entity Central Index Key 0001628908    
Amendment Flag false    
Document Year Focus 2023    
Document Fiscal Period Focus FY