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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Nov. 28, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Starfire Holding Corporation
Loss Contingencies [Line Items]
Ownership percentage by principal owner		99.60%
Pension funding indemnity agreement with subsidiary		$ 250.0
ACF
Loss Contingencies [Line Items]
Funded status of related party pension plan		$ 32.0
Icahn Enterprises Holdings
Loss Contingencies [Line Items]
Affiliate ownership interest		99.00%
Icahn Enterprises Holdings | Viskase And ACF Industries LLC [Member] | Minimum
Loss Contingencies [Line Items]
Ownership percentage by principal owner		80.00%
Mr. Icahn and affiliates | Minimum
Loss Contingencies [Line Items]
Affiliate ownership interest		80.00%
Mr. Icahn and affiliates | Icahn Enterprises G.P.
Loss Contingencies [Line Items]
Affiliate ownership in parent company general partner		100.00%
Mr. Icahn and affiliates | Icahn Enterprises Holdings
Loss Contingencies [Line Items]
Affiliate ownership interest		85.00%
Energy Segment
Loss Contingencies [Line Items]
Environmental loss contingency accrual		$ 22.0	$ 12.0
Amount of quantifying alleged damages		6.8
Price of RINs		435.0	435.0	$ 190.0
RFS position		692.0	494.0
Insurance policies coverage limits	$ 50.0
Energy Segment | Call option lawsuits
Loss Contingencies [Line Items]
Litigation settlement paid		79.0
Accrued expenses and other liabilities
Loss Contingencies [Line Items]
Environmental loss contingency accrual		$ 22.0	$ 13.0

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