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Derivative Financial Instruments (Details 3) (Refining LLC, USD $)
Dec. 31, 2013
Dec. 31, 2012
Current Liabilities
    
Offsetting Liabilities [Line Items]    
Gross Liabilities $ 31,400,000 $ 74,200,000
Gross Amounts Offsets (16,100,000) (6,500,000)
Net Liabilities Presented 15,300,000 67,700,000
Cash Collateral Not Offset 0 0
Net Amount 15,300,000 67,700,000
Noncurrent Liabilities
    
Offsetting Liabilities [Line Items]    
Gross Liabilities 1,900,000  
Gross Amounts Offsets (100,000)  
Net Liabilities Presented 1,800,000  
Cash Collateral Not Offset 0  
Net Amount 1,800,000  
Commodity derivatives | Current Liabilities
    
Offsetting Liabilities [Line Items]    
Gross Liabilities 31,400,000 74,200,000
Gross Amounts Offsets (16,100,000) (6,500,000)
Net Liabilities Presented 15,300,000 67,700,000
Cash Collateral Not Offset 0 0
Net Amount 15,300,000 67,700,000
Commodity derivatives | Noncurrent Liabilities
    
Offsetting Liabilities [Line Items]    
Gross Liabilities 1,900,000  
Gross Amounts Offsets (100,000)  
Net Liabilities Presented 1,800,000  
Cash Collateral Not Offset 0  
Net Amount $ 1,800,000