Schedule I - Condensed Financial Information of Parent - Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Total Assets	$ 27,746	$ 24,989
Accrued expenses and other liabilities	1,778	1,588
Debt	7,692	8,059
Total liabilities	18,403	15,731
Commitments and contingencies (Note 3)
Limited partners: Depositary units: 293,403,243 units issued and outstanding at December 31, 2021 and 241,338,835 units issued and outstanding at December 31, 2020	4,298	4,236
General partner	(754)	(853)
Total Liabilities and Equity	$ 27,746	$ 24,989
Limited partners: Depositary units issued	293,403,243	241,338,835	214,078,558	191,366,097
Limited partners: Depositary units outstanding	293,403,243	241,338,835
Icahn Enterprises (Parent)
Condensed Financial Statements, Captions [Line Items]
Investments in subsidiaries, net	$ 9,419	$ 9,274
Total Assets	9,419	9,274
Accrued expenses and other liabilities	65	80
Debt	5,810	5,811
Total liabilities	5,875	5,891
Commitments and contingencies (Note 3)
Limited partners: Depositary units: 293,403,243 units issued and outstanding at December 31, 2021 and 241,338,835 units issued and outstanding at December 31, 2020	4,298	4,236
General partner	(754)	(853)
Total equity	3,544	3,383
Total Liabilities and Equity	$ 9,419	$ 9,274
Limited partners: Depositary units issued	293,403,243	241,338,835
Limited partners: Depositary units outstanding	293,403,243	241,338,835