Cover Page - shares	6 Months Ended
	Jun. 30, 2022	Jul. 29, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2022
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	800 N. Glebe Road
Entity Address, Address Line Two	Suite 500
Entity Address, City or Town	Arlington
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	22203
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 Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		91,669,520
Entity Central Index Key	0001628908
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31