Cover - shares	9 Months Ended
	Sep. 30, 2021	Nov. 02, 2021
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	1-9516
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	16690 Collins Avenue
Entity Address, Address Line Two	PH-1
Entity Address, City or Town	Sunny Isles Beach,
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33160
City Area Code	305
Local Phone Number	422-4100
Title of 12(b) Security	Depositary Units of Icahn Enterprises L.P
Trading Symbol	IEP
Security Exchange Name	NASDAQ
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 Shell Company	false
Entity Common Stock, Shares Outstanding		278,605,558
Entity Central Index Key	0000813762
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Amendment Flag	false
Icahn Enterprises Holdings
Document Information [Line Items]
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	16690 Collins Avenue
Entity Address, Address Line Two	PH-1
Entity Address, City or Town	Sunny Isles Beach
Entity Address, State or Province	FL
Entity Address, Postal Zip Code	33160
City Area Code	305
Local Phone Number	422-4100
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
Entity Common Stock, Shares Outstanding		0
Entity Central Index Key	0001034563