Document and Entity Information Document - shares	3 Months Ended
	Mar. 31, 2019	May 01, 2019
Entity Information [Line Items]
Entity Registrant Name	ICAHN ENTERPRISES L.P.
Trading Symbol	IEP
Entity Central Index Key	0000813762
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		196,236,214
Entity Small Business	false
Entity Current Reporting Status	Yes
Icahn Enterprises Holdings
Entity Information [Line Items]
Entity Registrant Name	ICAHN ENTERPRISES HOLDINGS L.P.
Entity Central Index Key	0001034563
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		0
Entity Small Business	false
Entity Current Reporting Status	Yes