| Cover | Apr. 08, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 8, 2021 |
| Entity File Number | 1-9516 |
| Entity Registrant Name | ICAHN ENTERPRISES L.P. |
| Entity Central Index Key | 0000813762 |
| Entity Tax Identification Number | 13-3398766 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 16690 Collins Ave |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Depositary Units |
| Trading Symbol | IEP |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Icahn Enterprises Holdings | |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Apr. 8, 2021 |
| Entity File Number | 333-118021-01 |
| Entity Registrant Name | ICAHN ENTERPRISES HOLDINGS L.P. |
| Entity Central Index Key | 0001034563 |
| Entity Tax Identification Number | 13-3398767 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 16690 Collins Ave |
| 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
