| Cover | Nov. 05, 2019 |
| Document Information [Line Items] | |
| Entity Central Index Key | 0000813762 |
| Amendment Flag | false |
| Document Type | 8-K |
| Document Period End Date | Nov. 5, 2019 |
| 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 | 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Depositary Units of Icahn Enterprises L.P. Representing Limited Partner Interests |
| Trading Symbol | IEP |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| 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 |
