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Net Income Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions					3 Months Ended		9 Months Ended
	Sep. 30, 2023	Aug. 02, 2023	May 09, 2023	Feb. 22, 2023	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net Income Per LP Unit [Line Items]
Net Income (Loss)					$ (6)	$ (123)	$ (545)	$ 72
Net (loss) income attributable to Icahn Enterprises allocated to limited partners (98.01% allocation)					$ (6)	$ (121)	$ (534)	$ 71
Basic (loss) income per LP unit (in dollars per share)					$ (0.01)	$ (0.37)	$ (1.47)	$ 0.23
Basic weighted average LP units outstanding (in shares)					394,000,000	324,000,000	364,000,000	308,000,000
Diluted (loss) income per LP unit (in dollars per share)					$ (0.01)	$ (0.37)	$ (1.47)	$ 0.23
Diluted weighted average LP units outstanding (in shares)					394,000,000	324,000,000	364,000,000	308,000,000
Aggregate cash distributions to depositary unit holders							$ 190
Partners' Capital Account, Units, Sale of Units					0		3,395,353
Proceeds from Sale of Interest in Partnership Unit							$ 175
Potential aggregate sales proceeds from equity offering							$ 149
Fixed-rate senior unsecured notes, repurchase program authorized amount			$ 500
Depositary units, repurchase program authorized amount			$ 500
Brett Icahn | Incentive Plan 2017 [Member]
Net Income Per LP Unit [Line Items]
2017 LTIP units vested	4,973
Limited partners
Net Income Per LP Unit [Line Items]
Distribution declared per LP unit		$ 1.00	$ 2.00	$ 2.00
Units distributed to LP unitholders							53,830,451
Mr. Icahn and affiliates
Net Income Per LP Unit [Line Items]
Units distributed to LP unitholders							50,821,480
Icahn Enterprises Holdings LP
Net Income Per LP Unit [Line Items]
Affiliate ownership interest							98.01%

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