Segment Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Reportable segments	2		2
Other Revenue, Net	$ 12.2	$ 11.9	$ 37.1	$ 34.7
Twelve Inch Refined Products Pipeline Project
Segment Reporting Information [Line Items]
Description Of Pipeline Acquired			12
UNEV Pipeline [Member]
Segment Reporting Information [Line Items]
Percentage of interest owned in pipeline project	75.00%
SLC Pipeline [Member] | SLC Pipeline [Member] | HEP [Member]
Segment Reporting Information [Line Items]
Equity Method Investment, Ownership Percentage	25.00%		25.00%