Commitments and Contingencies - Narrative (Details) $ in Millions				1 Months Ended	12 Months Ended
	Dec. 22, 2021 USD ($)	Jun. 25, 2021 item	Jan. 27, 2021 USD ($) lawsuit	Dec. 31, 2020 USD ($) item	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Energy Segment
Loss Contingencies [Line Items]
Environmental loss contingency accrual				$ 11	$ 12	$ 11
Number of alleged violations count | item				9
Number of additional alleged violations count | item				8
Price of RINs					435	190	$ 43
Biofuel blending obligation				$ 214	$ 494	214
Amount of quantifying alleged damages in excess	$ 300
Insurance policies coverage limits			$ 50
Number of lawsuits relating to insurance coverage | lawsuit			2
Number of lawsuits relating to indemnity of insurance policies with threshold coverage | lawsuit			1
Number of small refinery exemptions vacated by court | item		3
Starfire Holding Corporation
Loss Contingencies [Line Items]
Ownership percentage by principal owner					99.60%
Pension funding indemnity agreement with subsidiary					$ 250
ACF
Loss Contingencies [Line Items]
Funded status of related party pension plan					66
Accrued expenses and other liabilities
Loss Contingencies [Line Items]
Environmental loss contingency accrual				$ 37	$ 13	$ 37
Icahn Enterprises Holdings
Loss Contingencies [Line Items]
Affiliate ownership interest					99.00%
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					88.00%