Document and Entity Information (USD $)
In Millions, except Share data, unless otherwise specified
 0 Months Ended 12 Months Ended
Mar. 01, 2015
Dec. 31, 2014
Mar. 01, 2015
Jun. 30, 2014
Document and Entity Information        
Entity Registrant Name   Esperion Therapeutics, Inc.    
Entity Central Index Key   0001434868    
Document Type   10-K    
Document Period End Date   Dec. 31, 2014    
Amendment Flag   false    
Current Fiscal Year End Date   --12-31    
Entity Well-known Seasoned Issuer   No    
Entity Voluntary Filers   No    
Entity Current Reporting Status   Yes    
Entity Filer Category   Accelerated Filer    
Entity Public Float       $ 244.4
Entity Common Stock, Shares Outstanding     20,425,860  
Document Fiscal Year Focus   2014    
Document Fiscal Period Focus   FY    
Entity Listing, Par Value Per Share $ 0.001