Derivative Financial Instruments (Schedule Of NYMEX Contracts And Butane Price Swap Purchase Agreements) (Details) bbl in Millions	Sep. 30, 2015 bbl
Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	0.7
Economic Hedges [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	5.4	[1]
Economic Hedges Futures [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	1.2
Basis Swap [Member]
Derivative [Line Items]
Derivative, Nonmonetary Notional Amount	1.2

[1] Of the 5.4 million barrels of products we have economically hedged at September 30, 2015, we had open agreements which swap the pricing on 1.2 million of those barrels from New York Harbor to Platts Group 3 or Platts Gulf Coast, which are the geographic locations where these barrels will be sold.