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Net Income Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions					3 Months Ended		6 Months Ended
	May 05, 2021	Feb. 26, 2021	Feb. 24, 2021	May 02, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per LP Unit [Line Items]
Net (loss) income attributable to Icahn Enterprises					$ (136)	$ 299	$ 26	$ (1,085)
Net (loss) income attributable to Icahn Enterprises allocated to limited partners (98.01% allocation)					$ (134)	$ 293	$ 25	$ (1,063)
Basic and diluted loss per LP unit:
Basic and diluted (loss) income per LP unit					$ (0.53)	$ 1.36	$ 0.10	$ (4.97)
Basic and diluted weighted average LP units outstanding					251,000,000	215,000,000	247,000,000	214,000,000
Potential aggregate sales proceeds from equity offering		$ 400		$ 400			$ 16
LP units sold					3,509,574	374,113	6,618,919	481,244
Proceeds from sale of LP units					$ 200	$ 19	$ 384	$ 26
Limited partners
Basic and diluted loss per LP unit:
Distribution declared per LP unit	$ 2.00		$ 2.00
LP units distributed							16,573,498
Aggregate cash distributions to depositary unitholders					$ 56		$ 56
Limited partners | Mr. Icahn and affiliates
Basic and diluted loss per LP unit:
LP units distributed							15,896,308

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