Segment Information (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Segment Reporting Information [Line Items]
Reportable segments	2	2
SLC Pipeline Project [Member] | HEP [Member]
Segment Reporting Information [Line Items]
Percentage of interest owned in pipeline project		25.00%
Twelve Inch Refined Products Pipeline Project
Segment Reporting Information [Line Items]
Percentage of interest owned in pipeline project		75.00%
Description Of Pipeline Acquired		12
UNEV Pipeline [Member]
Segment Reporting Information [Line Items]
Revenue, Net	$ 3.0	$ 10.8