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Commitments and Contingencies (Details 3) $ in Millions |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Aug. 31, 2012 | Jun. 30, 2015 USD ($) sponsor | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) sponsor | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |
Environmental costs recognized capitalized in the period |  | $ 7.4 | $ 26.4 | $ 18.3 | $ 60.2 |
Affiliate pension obligations |  |  |  |  |  |
Minimum ownership interest in CVR Energy by Mr. Icahn's affiliates (as a percent) |  | 80.00% |  | 80.00% |  |
Number of sponsors of pension plans | sponsor |  | 2 |  | 2 |  |
Mr. Icahn's affiliates |  |  |  |  |  |
Affiliate pension obligations |  |  |  |  |  |
Ownership percentage held by controlling stockholder |  |  |  | 82.00% |  |
EHS |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Environmental accruals |  | $ 3.0 |  | $ 3.0 |  | $ 1.1
EHS | CRRM |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Cost of renewable identification numbers |  | 37.5 | $ 29.1 | 74.1 | $ 63.8 |
Biofuel blending obligation recorded in other current liabilities |  | 33.2 |  | 33.2 |  | 52.3
Affiliate Pension Obligations |  |  |  |  |  |
Affiliate pension obligations |  |  |  |  |  |
Underfunded pension obligation, if ACF and Federal-Mogul plans were voluntarily terminated |  | $ 500.4 |  | $ 500.4 |  | $ 473.8
New Vitol Agreement | CRRM |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Renewal term of agreement | 1 year |  |  |  |  |
Number of days for prior notice of nonrenewal | 180 days |  |  |  |  |

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