Derivatives (Schedule Of Outstanding Derivatives Entered Into Hedge Inventory Or Fixed Price Purchase Commitments) (Details) (Not Designated As Hedging Instrument [Member])	12 Months Ended
	Dec. 31, 2013 bbl
Selling Contracts [Member] | Crude Oil Futures [Member]
Derivative [Line Items]
Weighted average contract price per bbl	94.91
Derivative, Nonmonetary Notional Amount	559
Selling Contracts [Member] | Crude oil LLS/WTI swap [Member]
Derivative [Line Items]
Weighted average contract price per bbl	1.05
Derivative, Nonmonetary Notional Amount	150
Selling Contracts [Member] | Diesel Futures [Member]
Derivative [Line Items]
Weighted average contract price per bbl	2.97
Derivative, Nonmonetary Notional Amount	11
Selling Contracts [Member] | Singapore fuel oil [Domain]
Derivative [Line Items]
Weighted average contract price per bbl	589.47
Derivative, Nonmonetary Notional Amount	62
Selling Contracts [Member] | Fuel Oil Futures [Member]
Derivative [Line Items]
Weighted average contract price per bbl	90.98
Derivative, Nonmonetary Notional Amount	953
Selling Contracts [Member] | Crude Oil Options [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	160
Underlying, Derivative	1.07
Selling Contracts [Member] | Diesel Options [Member]
Derivative [Line Items]
Weighted average contract price per bbl	2.50
Derivative, Nonmonetary Notional Amount	20
Buying Contracts [Member] | Crude Oil Futures [Member]
Derivative [Line Items]
Weighted average contract price per bbl	98.12
Derivative, Nonmonetary Notional Amount	441
Buying Contracts [Member] | Crude oil LLS/WTI swap [Member]
Derivative [Line Items]
Weighted average contract price per bbl	0.00
Derivative, Nonmonetary Notional Amount	0
Buying Contracts [Member] | Diesel Futures [Member]
Derivative [Line Items]
Weighted average contract price per bbl	0.00
Derivative, Nonmonetary Notional Amount	0
Buying Contracts [Member] | Singapore fuel oil [Domain]
Derivative [Line Items]
Weighted average contract price per bbl	0.00
Derivative, Nonmonetary Notional Amount	0
Buying Contracts [Member] | Fuel Oil Futures [Member]
Derivative [Line Items]
Weighted average contract price per bbl	91.37
Derivative, Nonmonetary Notional Amount	110
Buying Contracts [Member] | Crude Oil Options [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	60
Underlying, Derivative	0.24
Buying Contracts [Member] | Diesel Options [Member]
Derivative [Line Items]
Weighted average contract price per bbl	0.00
Derivative, Nonmonetary Notional Amount	0