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Commitments and Contingencies - Affiliate Pension Obligations (Details) $ in Millions	12 Months Ended
	Dec. 31, 2017 USD ($) affiliate	Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items]
Minimum ownership interest in company	80.00%
Affiliate Pension Obligations
Loss Contingencies [Line Items]
Number of Entities | affiliate	2
Aggregate underfunded pension obligation if pension plans voluntarily terminated by affiliate | $	$ 423.7	$ 613.4
IEP
Loss Contingencies [Line Items]
Ownership percentage held by controlling stockholder	82.00%

X

- Definition

Represents the percentage of ownership interest held by the majority shareholder

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X

- Definition

Represents the percentage of ownership interest in CVR Energy by Mr. Icahn's affiliates.

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+ Details

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- Definition

Number of Entities

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- Definition

Represents the underfunded pension obligation of affiliates for which the Company is joint and severally liable.

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No definition available.

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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