Net Income (Loss) Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended
	Feb. 26, 2024	Apr. 30, 2024	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	May 09, 2023
Net Income (Loss) Per LP Unit [Line Items]
Net Income (Loss)			$ (38)	$ (270)
Net (loss) income attributable to Icahn Enterprises allocated to limited partners (98.01% allocation)			$ (37)	$ (265)
Basic loss per LP unit (in dollars per share)			$ (0.09)	$ (0.75)
Basic weighted average LP units outstanding (in shares)			429,000,000	354,000,000
Diluted loss per LP unit (in dollars per share)			$ (0.09)	$ (0.75)
Diluted weighted average LP units outstanding (in shares)			429,000,000	354,000,000
Aggregate cash distributions to depositary unit holders		$ 97
Limited partners: Depositary units issued		431,808,850	429,033,241
Partners' Capital Account, Units, Sale of Units			2,775,609
Limited partners: Depositary units issued			431,808,850
Proceeds from Sale of Interest in Partnership Unit			$ 50
Potential aggregate sales proceeds from equity offering			$ 99
Repurchase amount					$ 92
Antidilutive securities excluded from computation of earnings per share			10,000,000	6,000,000
Fixed-rate senior unsecured notes, repurchase program authorized amount						$ 500
Depositary units, repurchase program authorized amount						$ 500
Repurchased senior notes			$ 92
Limited partners
Net Income (Loss) Per LP Unit [Line Items]
Units distributed to LP unitholders		19,186,659
Distributions liability	$ 439
Amount of distribution per share	$ 1.00
Mr. Icahn and affiliates
Net Income (Loss) Per LP Unit [Line Items]
Aggregate cash distributions to depositary unit holders		$ 55
Units distributed to LP unitholders		18,016,077
Icahn Enterprises Holdings LP
Net Income (Loss) Per LP Unit [Line Items]
Affiliate ownership interest			98.01%