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Derivative Financial Instruments (Details 2) (Refining LLC, USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Current Assets
Offsetting Assets [Line Items]
Gross Assets	$ 4.3
Gross Amounts Offset	(3.4)
Net Assets Presented	0.9
Cash Collateral Not Offset	0
Net Amount	0.9
Noncurrent Assets
Offsetting Assets [Line Items]
Gross Assets	0.1	0.9
Gross Amounts Offset	0	0
Net Assets Presented	0.1	0.9
Cash Collateral Not Offset	0	0
Net Amount	0.1	0.9
Commodity derivatives \| Current Assets
Offsetting Assets [Line Items]
Gross Assets	4.3
Gross Amounts Offset	(3.4)
Net Assets Presented	0.9
Cash Collateral Not Offset	0
Net Amount	0.9
Commodity derivatives \| Noncurrent Assets
Offsetting Assets [Line Items]
Gross Assets	0.1	0.9
Gross Amounts Offset	0	0
Net Assets Presented	0.1	0.9
Cash Collateral Not Offset	0	0
Net Amount	$ 0.1	$ 0.9

Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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