Schedule I - Condensed Financial Information of Parent - Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Condensed Financial Statements, Captions [Line Items]
Interest expense	$ 666	$ 688	$ 605
Net (loss) income	500	2,468	1,791
Limited partners	(604)	(1,620)	(1,076)
General partner	86	(33)	(22)
Icahn Enterprises (Parent)
Condensed Financial Statements, Captions [Line Items]
Interest expense	(323)	(342)	(350)
Gain (loss) on extinguishment of debt	3	(4)	2
Equity in (loss) income of subsidiaries	(198)	(1,307)	(750)
Net (loss) income	(518)	(1,653)	(1,098)
Limited partners	(604)	(1,620)	(1,076)
General partner	$ 86	$ (33)	$ (22)