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Net Income (Loss) Per LP Unit (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	May 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Earnings Per LP Unit [Line Items]
Net (loss) income attributable to Icahn Enterprises from continuing operations		$ (518)	$ (1,653)	$ (1,066)
Net (loss) income attributable to Icahn Enterprises from discontinued operations				$ (32)
Basic and diluted loss per LP unit:
Continuing operations		$ (2.32)	$ (7.33)	$ (5.23)
Discontinued operations				(0.15)
Basic and diluted loss per LP unit		$ (2.32)	$ (7.33)	$ (5.38)
Basic and diluted weighted average LP units outstanding		260,000,000	221,000,000	200,000,000
Limited partners: Depositary units issued		293,403,243	241,338,835	214,078,558	191,366,097
Units distributed to LP unitholders		36,875,398	25,352,178	21,898,853
2017 LTIP units vested		18,491		19,259
Partners' Capital Account, Units, Sale of Units			1,908,099	794,349
Potential aggregate sales proceeds from equity offering	$ 400	$ 328
Proceeds from Sale of Interest in Partnership Unit		$ 833
Brett Icahn
Basic and diluted loss per LP unit:
Partners' Capital Account, Units, Sale of Units		15,170,519
General partner
Earnings Per LP Unit [Line Items]
Less: net income attributable to Icahn Enterprises from continuing operations allocated 100% to general partner		$ (98)
Limited partners
Earnings Per LP Unit [Line Items]
Net (loss) income attributable to Icahn Enterprises from continuing operations		(604)	$ (1,620)	$ (1,045)
Net loss attributable to Icahn Enterprises from continuing operations allocable to limited partners		$ (616)	$ (1,653)	(1,066)
Net (loss) income attributable to Icahn Enterprises from discontinued operations				(31)
Net (loss) income attributable to Icahn Enterprises from discontinued operations allocable to limited partners				$ (32)
Mr. Icahn and affiliates
Basic and diluted loss per LP unit:
Limited partners: Depositary units issued		257,047,260	221,749,462	197,049,652	175,441,588
Units distributed to LP unitholders		35,297,798	24,902,568	21,608,064
Partners' Capital Account, Units, Trasfer of Units			(202,758)
Public unitholders
Basic and diluted loss per LP unit:
Limited partners: Depositary units issued		36,355,983	19,589,373	17,028,906	15,924,509
Units distributed to LP unitholders		1,577,600	449,610	290,789
2017 LTIP units vested		18,491		19,259
Partners' Capital Account, Units, Sale of Units			1,908,099	794,349
Partners' Capital Account, Units, Trasfer of Units			202,758
Public unitholders | Brett Icahn
Basic and diluted loss per LP unit:
Partners' Capital Account, Units, Trasfer of Units		15,170,519

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