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Derivative Financial Instruments - Schedule of Gains (Losses) on Derivatives (Details) - CVR Refining, LP - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Total realized gain (loss) on derivatives, net | $ 17 | $ 0 | $ 31 | $ 1
Commodity Derivatives |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Total realized gain (loss) on derivatives, net | 19 | 0 | 33 | 1
Margin Account |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Total realized gain (loss) on derivatives, net | $ (2) | $ 0 | $ (2) | $ 0

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- 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. + References No definition available. + Details
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