Intangible Assets, Goodwill And Other Assets (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2011 cubicFeet	Dec. 31, 2010	Dec. 31, 2009
Intangible Assets, Goodwill And Other Assets [Line Items]
Amortization expense on intangible assets	$ 30,900,000	$ 26,800,000	$ 33,100,000
Goodwill	325,046,000	325,046,000
Impairment of goodwill	0	0	0
CO2 maximum volumetric production entitled under the volumetric production payments (in billions)	77.2
Amortization on CO2 assets	3,700,000	4,300,000	4,300,000
Refinery Services [Member]
Intangible Assets, Goodwill And Other Assets [Line Items]
Goodwill	301,900,000	301,900,000
Supply And Logistics [Member]
Intangible Assets, Goodwill And Other Assets [Line Items]
Goodwill	23,100,000	23,100,000
Decrease in income during current year due to change in useful life	7,700,000
Decrease in income during current year due to change in useful life per common unit	0.11
Impairment of goodwill	$ 0	$ 0	$ 0