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Derivatives (Schedule Of Outstanding Derivatives Entered Into To Hedge Inventory Or Fixed Price Purchase Commitments) (Details) (Not Designated As Hedging Instrument [Member]) | 6 Months Ended
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Jun. 30, 2014 bbl
Sell (Short) Contracts [Member] | Crude Oil Futures [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 613
Weighted average contract price per gal | 104.52
Sell (Short) Contracts [Member] | Diesel Futures [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 122
Weighted average contract price per gal | 2.98
Sell (Short) Contracts [Member] | Fuel Oil Futures [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 470
Weighted average contract price per gal | 91.25
Sell (Short) Contracts [Member] | Crude Oil Options [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 155
Underlying, Derivative | 0.97
Sell (Short) Contracts [Member] | Diesel Options [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 25
Weighted average contract price per gal | 2.58
Buy (Long) Contracts [Member] | Crude Oil Futures [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 132
Weighted average contract price per gal | 105.70
Buy (Long) Contracts [Member] | Diesel Futures [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 2
Weighted average contract price per gal | 3.04
Buy (Long) Contracts [Member] | Fuel Oil Futures [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 0
Weighted average contract price per gal | 0.00
Buy (Long) Contracts [Member] | Crude Oil Options [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 0
Underlying, Derivative | 0.00
Buy (Long) Contracts [Member] | Diesel Options [Member] |
Derivative [Line Items] |
Derivative, Nonmonetary Notional Amount | 0
Weighted average contract price per gal | 0.00

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- Definition Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
Name: | invest_DerivativeNonmonetaryNotionalAmount
Namespace Prefix: | invest_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract but not the derivative contract itself. + References No definition available. + Details
Name: | us-gaap_UnderlyingDerivative
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

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- Definition Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract measured in volume but not the derivative contract itself. + References No definition available. + Details
Name: | us-gaap_UnderlyingDerivativeVolume
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration