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Derivative Financial Instruments, Investments and Fair Value Measurements - Additional Information (Details) derivative in Millions | Sep. 30, 2020 derivative
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Commodity Swap Postions |
Derivative [Line Items] |
Outstanding positions (less than for commodity swap positions) | 1
Forward Contracts | Purchase Commitments |
Derivative [Line Items] |
Outstanding positions (less than for commodity swap positions) | 3
Forward Contracts | Sale Commitments |
Derivative [Line Items] |
Outstanding positions (less than for commodity swap positions) | 2
RINs | Sale Commitments |
Derivative [Line Items] |
Outstanding positions (less than for commodity swap positions) | 62

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