| Document and Entity Information | Nov. 05, 2019 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001577916 |
| Document Type | 8-K |
| Document Period End Date | Nov. 5, 2019 |
| Entity Registrant Name | Premier, Inc. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-36092 |
| Entity Tax Identification Number | 35-2477140 |
| Entity Address, Address Line One | 13034 Ballantyne Corporate Place |
| Entity Address, City or Town | Charlotte |
| Entity Address, State or Province | NC |
| Entity Address, Postal Zip Code | 28277 |
| City Area Code | (704) |
| Local Phone Number | 357-0022 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Class A Common Stock, $0.01 Par Value |
| Trading Symbol | PINC |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
