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Derivative Financial Instruments, Investments and Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - Recurring - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Prepaid expenses and other current assets (investments)   $ 173
Total Assets $ 1 173
Note payable and finance lease obligations (current portion of long-term debt)   (2)
Long-term debt and finance lease obligations, net of current portion (long-term debt) (1,620) (1,604)
Total Liabilities (2,116) (1,837)
Commodity derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other current assets (commodity derivatives) 1  
Other current liabilities (commodity derivatives) (2) (17)
RFS obligation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other current liabilities (RFS obligation) (494) (214)
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Prepaid expenses and other current assets (investments)   173
Total Assets 0 173
Note payable and finance lease obligations (current portion of long-term debt)   0
Long-term debt and finance lease obligations, net of current portion (long-term debt) 0 0
Total Liabilities 0 0
Level 1 | Commodity derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other current assets (commodity derivatives) 0  
Other current liabilities (commodity derivatives) 0 0
Level 1 | RFS obligation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other current liabilities (RFS obligation) 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Prepaid expenses and other current assets (investments)   0
Total Assets 1 0
Note payable and finance lease obligations (current portion of long-term debt)   (2)
Long-term debt and finance lease obligations, net of current portion (long-term debt) (1,620) (1,604)
Total Liabilities (2,116) (1,837)
Level 2 | Commodity derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other current assets (commodity derivatives) 1  
Other current liabilities (commodity derivatives) (2) (17)
Level 2 | RFS obligation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other current liabilities (RFS obligation) (494) (214)
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Prepaid expenses and other current assets (investments)   0
Total Assets 0 0
Note payable and finance lease obligations (current portion of long-term debt)   0
Long-term debt and finance lease obligations, net of current portion (long-term debt) 0 0
Total Liabilities 0 0
Level 3 | Commodity derivatives    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other current assets (commodity derivatives) 0  
Other current liabilities (commodity derivatives) 0 0
Level 3 | RFS obligation    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Other current liabilities (RFS obligation) $ 0 $ 0