Net Income (Loss) Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended		3 Months Ended		6 Months Ended
	May 06, 2024	Feb. 26, 2024	Jun. 30, 2024	Apr. 30, 2024	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	May 09, 2023
Net Income (Loss) Per LP Unit [Line Items]
Net Income (Loss)					$ (331)	$ (269)	$ (369)	$ (539)
Net (loss) income attributable to Icahn Enterprises allocated to limited partners (98.01% allocation)					$ (325)	$ (264)	$ (362)	$ (528)
Basic loss per LP unit (in dollars per share)					$ (0.72)	$ (0.72)	$ (0.82)	$ (1.46)
Basic weighted average LP units outstanding (in shares)					450,000,000	367,000,000	440,000,000	361,000,000
Diluted loss per LP unit (in dollars per share)					$ (0.72)	$ (0.72)	$ (0.82)	$ (1.46)
Diluted weighted average LP units outstanding (in shares)					450,000,000	367,000,000	440,000,000	361,000,000
Aggregate cash distributions to depositary unit holders			$ 106	$ 97
Partners' Capital Account, Units, Sale of Units					2,798,377		5,573,986
Proceeds from Sale of Interest in Partnership Unit					$ 49		$ 99
Potential aggregate sales proceeds from equity offering							51
Fixed-rate senior unsecured notes, repurchase program authorized amount									$ 500
Depositary units, repurchase program authorized amount									$ 500
Repurchased senior notes			$ 92		$ 92		$ 92
Limited partners
Net Income (Loss) Per LP Unit [Line Items]
Distribution declared per LP unit	$ 1.00	$ 1.00
Units distributed to LP unitholders			21,669,076	19,186,659
Mr. Icahn and affiliates
Net Income (Loss) Per LP Unit [Line Items]
Units distributed to LP unitholders			20,418,007	18,016,077
Aggregate cash distributions to depositary unit holders			$ 60	$ 55
Icahn Enterprises Holdings LP
Net Income (Loss) Per LP Unit [Line Items]
Affiliate ownership interest							98.01%