Net Income (Loss) Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	May 31, 2019	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	May 09, 2023
Net Income (Loss) Per LP Unit [Line Items]
Net Income (Loss)		$ (684)	$ (183)	$ (518)
Net (loss) income attributable to Icahn Enterprises allocated to limited partners (98.01% allocation)		$ (670)	$ (179)	$ (604)
Basic loss per LP unit (in dollars per share)		$ (1.75)	$ (0.57)	$ (2.32)
Basic weighted average LP units outstanding (in shares)		382,000,000	316,000,000	260,000,000
Diluted loss per LP unit (in dollars per share)		$ (1.75)	$ (0.57)	$ (2.32)
Diluted weighted average LP units outstanding (in shares)		382,000,000	316,000,000	260,000,000
Aggregate cash distributions to depositary unit holders		$ 301	$ 222
Limited partners: Depositary units issued		353,572,182	293,403,243
Units distributed to LP unitholders		72,060,733	45,520,325
2017 LTIP units vested		4,973	29,342
Partners' Capital Account, Units, Sale of Units		3,395,353	14,619,272
Limited partners: Depositary units issued		429,033,241	353,572,182	293,403,243
Proceeds from Sale of Interest in Partnership Unit		$ 175
Potential aggregate sales proceeds from equity offering	$ 400	$ 149
Amount of distribution per share		$ 6.00	$ 8.00
Fixed-rate senior unsecured notes, repurchase program authorized amount		$ 92			$ 500
Depositary units, repurchase program authorized amount					$ 500
General partner
Net Income (Loss) Per LP Unit [Line Items]
Less: net income attributable to Icahn Enterprises from continuing operations allocated 100% to general partner		(13)	$ (4)	$ (98)
Limited partners
Net Income (Loss) Per LP Unit [Line Items]
Net (loss) income attributable to Icahn Enterprises allocated to limited partners (98.01% allocation)		(670)	(179)	(604)
Net loss attributable to Icahn Enterprises from continuing operations allocable to limited partners		$ (697)	$ (187)	$ (616)
Units distributed to LP unitholders		72,060,733	45,520,325
Mr. Icahn and affiliates
Net Income (Loss) Per LP Unit [Line Items]
Aggregate cash distributions to depositary unit holders		$ 70	$ 0
Limited partners: Depositary units issued		299,997,624	257,047,260
Units distributed to LP unitholders		67,882,278	42,950,364
Limited partners: Depositary units issued		367,879,902	299,997,624	257,047,260
Public unitholders
Net Income (Loss) Per LP Unit [Line Items]
Limited partners: Depositary units issued		53,574,558	36,355,983
Units distributed to LP unitholders		4,178,455	2,569,961
2017 LTIP units vested		4,973	29,342
Partners' Capital Account, Units, Sale of Units		3,395,353	14,619,272
Limited partners: Depositary units issued		61,153,339	53,574,558	36,355,983
Icahn Enterprises Holdings LP
Net Income (Loss) Per LP Unit [Line Items]
Affiliate ownership interest		98.01%	98.01%	98.01%
Icahn Enterprises Holdings LP | General partner
Net Income (Loss) Per LP Unit [Line Items]
General partner ownership percentage in Icahn Enterprises		100.00%