Goodwill and Long-lived Asset Impairment (Schedule Of Changes By Segment To The Carrying Amount Of Goodwill) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jul. 01, 2017	Feb. 01, 2017
Goodwill [Line Items]
Impairment of Long-Lived Assets Held-for-use	$ 19,200,000	$ 344,800,000	$ 0	$ 0
Goodwill, Gross		2,554,062,000		2,331,781,000		$ 194,800,000
Goodwill		2,244,744,000	2,022,463,000
Goodwill, Impaired, Accumulated Impairment Loss		(309,318,000)	(309,318,000)
Asset Impairment Charges	23,200,000	19,247,000	654,084,000	0
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount					10.00%
Refining Segment
Goodwill [Line Items]
Goodwill, Gross		2,042,790,000		2,042,790,000
Goodwill		1,733,472,000	1,733,472,000
Goodwill, Impaired, Accumulated Impairment Loss		(309,318,000)	(309,318,000)
Asset Impairment Charges		19,247,000
HEP
Goodwill [Line Items]
Goodwill, Gross		310,610,000		288,991,000
Goodwill		21,619,000	288,991,000
Goodwill, Impaired, Accumulated Impairment Loss		0	0
Asset Impairment Charges		0
324191 Petroleum Lubricating Oil and Grease Manufacturing [Member]
Goodwill [Line Items]
Goodwill, Gross		200,662,000		$ 0
Goodwill			0			$ 194,760,000
Goodwill, Foreign Currency Translation Gain (Loss)		5,902,000
Goodwill, Impaired, Accumulated Impairment Loss		0	0
Asset Impairment Charges		0
Business Combination Acquiree [Member]
Goodwill [Line Items]
Goodwill		216,379,000
HEP
Goodwill [Line Items]
Goodwill		$ 310,610,000	$ 288,991,000
Property, Plant and Equipment [Member]
Goodwill [Line Items]
Asset Impairment Charges	$ 4,000,000