| Cover Page | Dec. 11, 2020 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 11, 2020 |
| Entity Registrant Name | Esperion Therapeutics, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-35986 |
| Entity Tax Identification Number | 26-1870780 |
| Entity Address, Address Line One | 3891 Ranchero Drive |
| Entity Address, Address Line Two | Suite 150 |
| Entity Address, City or Town | Ann Arbor |
| Entity Address, State or Province | MI |
| Entity Address, Postal Zip Code | 48108 |
| City Area Code | 734 |
| Local Phone Number | 887-3903 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.001 per share |
| Trading Symbol | ESPR |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001434868 |
