Derivatives (Schedule Of Outstanding Derivatives Entered Into To Hedge Inventory Or Fixed Price Purchase Commitments) (Details) (Not Designated As Hedging Instrument [Member])	3 Months Ended
	Mar. 31, 2014 bbl
Sell (Short) Contracts [Member] | Crude Oil Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	159
Weighted average contract price per gal	99.43
Sell (Short) Contracts [Member] | Crude oil LLSWTI swap [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	105
Weighted average contract price per gal	4.05
Sell (Short) Contracts [Member] | Diesel Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	48
Weighted average contract price per gal	2.91
Sell (Short) Contracts [Member] | Fuel Oil Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	690
Weighted average contract price per gal	89.71
Sell (Short) Contracts [Member] | Crude Oil Options [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	125
Underlying, Derivative	1.13
Sell (Short) Contracts [Member] | Diesel Options [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	20
Weighted average contract price per gal	2.03
Buy (Long) Contracts [Member] | Crude Oil Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	100
Weighted average contract price per gal	102.13
Buy (Long) Contracts [Member] | Crude oil LLSWTI swap [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0
Weighted average contract price per gal	0.00
Buy (Long) Contracts [Member] | Diesel Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	10
Weighted average contract price per gal	2.93
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