| Cover Page | Jun. 28, 2021 | Apr. 26, 2021 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Jun. 28, 2021 | |
| 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 |
