Schedule I - Condensed Financial Information of Parent - Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2027	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Condensed Financial Statements, Captions [Line Items]
Interest expense			$ 504	$ 523	$ 554
Gain (loss) on extinguishment of debt	$ 13	$ 8	3
Net loss			(326)	(542)	(1,012)
Limited partners			(293)	(436)	(670)
General partner			(6)	(9)	(14)
Icahn Enterprises (Parent)
Condensed Financial Statements, Captions [Line Items]
Interest expense			(340)	(317)	(286)
Gain (loss) on extinguishment of debt			4	8	13
Equity in gain (loss) of subsidiaries			37	(136)	(411)
Net loss			(299)	(445)	(684)
Limited partners			(293)	(436)	(670)
General partner			$ (6)	$ (9)	$ (14)