Goodwill (Schedule Of Changes By Segment To The Carrying Amount Of Goodwill) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jul. 01, 2016
Goodwill [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 344,800,000	$ 0	$ 0
Goodwill, Impairment Loss	(309,300,000)
Goodwill, Gross	$ 2,000,000,000
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	20.00%			4.00%
Refining Segment
Goodwill [Line Items]
Goodwill, Gross	$ 1,700,000,000
HEP
Goodwill [Line Items]
Goodwill, Gross	$ 300,000,000