v2.4.0.8
Derivative Financial Instruments Derivative Financial Instruments (Schedule of Forward Purchase and Sales Agreements) (Details) (Forward Contracts [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
bbl
Forward Contracts [Member]
 
Derivative [Line Items]  
Purchase Commitment, Remaining Minimum Amount Committed $ 122.8
Barrels Accounted for Forward Purchase Contract for Product Purchases 2,000,000
Supply Commitment, Remaining Minimum Amount Committed $ 64.2
Barrels Accounted for Forward Sale Contract for Product Sales 600,000