| Document and Entity Information | Nov. 03, 2021 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001756497 |
| Document Type | 8-K |
| Document Period End Date | Nov. 3, 2021 |
| Entity Registrant Name | Change Healthcare Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-38961 |
| Entity Tax Identification Number | 82-2152098 |
| Entity Address, Address Line One | 424 Church Street |
| Entity Address, Address Line Two | Suite 1400 |
| Entity Address, City or Town | Nashville |
| Entity Address, State or Province | TN |
| Entity Address, Postal Zip Code | 37219 |
| City Area Code | (615) |
| Local Phone Number | 932-3000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, par value $0.001 per share |
| Trading Symbol | CHNG |
| Security Exchange Name | NASDAQ |
| Capital Units [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | 6.00% Tangible Equity Units |
| Trading Symbol | CHNGU |
| Security Exchange Name | NASDAQ |
