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Derivative Financial Instruments, Investments and Fair Value Measurements - Additional Information (Details) derivative in Millions, $ in Millions | Jun. 10, 2021 shares | Sep. 30, 2021 USD ($) derivative | Dec. 31, 2020 USD ($)
--- | --- | --- | ---
Recurring |  |  |
Derivative [Line Items] |  |  |
Prepaid expenses and other current assets (investments) | $ |  | $ 4 | $ 173
Level 1 | Recurring |  |  |
Derivative [Line Items] |  |  |
Prepaid expenses and other current assets (investments) | $ |  | $ 4 | $ 173
Delek |  |  |
Derivative [Line Items] |  |  |
Dividends paid to CVR Energy stockholders (in shares) | shares | 10,539,880 |  |
Commodity Swap Postions |  |  |
Derivative [Line Items] |  |  |
Outstanding positions |  | 2 |
Forward Contracts | Purchase Commitments |  |  |
Derivative [Line Items] |  |  |
Outstanding positions |  | 1 |
Forward Contracts | Sale Commitments |  |  |
Derivative [Line Items] |  |  |
Outstanding positions |  | 1 |
RINs | Purchase Commitments |  |  |
Derivative [Line Items] |  |  |
Outstanding positions |  | 17 |

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