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