Document and Entity Information - shares	6 Months Ended
	Sep. 30, 2020	Oct. 27, 2020
Document Type	10-Q
Document Quarterly Report	true
Current Fiscal Year End Date	--03-31
Document Period End Date	Sep. 30, 2020
Document Fiscal Year Focus	2021
Document Transition Report	false
Entity File Number	001-38961
Entity Registrant Name	Change Healthcare Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	82-2152098
Entity Address, Address Line One	3055 Lebanon Pike
Entity Address, Address Line Two	Suite 1000
Entity Address, City or Town	Nashville
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	37214
City Area Code	615
Local Phone Number	932-3000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		304,452,260
Amendment Flag	false
Entity Central Index Key	0001756497
Document Fiscal Period Focus	Q2
Common Stock [Member]
Title of 12(b) Security	Common Stock, par value $.001 per share
Trading Symbol	CHNG
Security Exchange Name	NASDAQ
Tangible Equity Units [Member]
Title of 12(b) Security	6.00% Tangible Equity Units
Trading Symbol	CHNGU
Security Exchange Name	NASDAQ