Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Feb. 28, 2020	Jun. 28, 2019
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019
Current Fiscal Year End Date	--12-31
Document Annual Report	true
Document Transition Report	false
Entity Central Index Key	0000813762
Entity File Number	001-09516
Entity Registrant Name	ICAHN ENTERPRISES L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3398766
Entity Address, Address Line One	767 Fifth Avenue
Entity Address, Address Line Two	Suite 4700
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10153
City Area Code	(212)
Local Phone Number	702-4300
Title of 12(b) Security	Depositary Units of Icahn Enterprises L.P. Representing Limited Partner Interests
Trading Symbol	IEP
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Public Float			$ 1,174
Entity Common Stock, Shares Outstanding		214,078,558
Icahn Enterprises Holdings
Document Information [Line Items]
Entity Central Index Key	0001034563
Entity File Number	333-118021-01
Entity Registrant Name	ICAHN ENTERPRISES HOLDINGS L.P.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3398767
Entity Address, Address Line One	767 Fifth Avenue
Entity Address, Address Line Two	Suite 4700
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10153
City Area Code	(212)
Local Phone Number	702-4300
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false