Segment Information (Schedule Of Segment Reporting Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Sales and other revenues	$ 5,327,122	$ 5,204,798	$ 15,333,759	$ 14,943,217
Depreciation and amortization	82,127	65,112	224,381	178,162
Income (loss) from operations	149,750	978,304	1,158,951	2,211,005
Property, Plant and Equipment, Additions	115,386	79,517	286,189	207,537
Cash, Cash Equivalents, And Investments In Marketable Securities	1,956,648		1,956,648		2,393,401
Assets	10,498,644		10,498,644		10,328,997
Long-term Debt	999,884		999,884		1,336,238
Refining [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	5,314,954	5,192,649	15,294,261	14,908,033
Depreciation and amortization	61,553	47,555	172,166	133,087
Income (loss) from operations	144,508	973,837	1,145,487	2,200,564
Property, Plant and Equipment, Additions	92,918	70,069	231,416	171,865
Cash, Cash Equivalents, And Investments In Marketable Securities	40		40		2,101
Assets	7,285,965		7,285,965		6,702,872
Long-term Debt	0		0		0
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	257	352	1,054	653
Depreciation and amortization	1,739	4,793	4,426	7,013
Income (loss) from operations	(28,701)	(31,861)	(87,319)	(88,889)
Property, Plant and Equipment, Additions	8,230	3,765	23,674	6,370
Cash, Cash Equivalents, And Investments In Marketable Securities	1,945,388		1,945,388		2,386,063
Assets	2,129,518		2,129,518		2,531,967
Long-term Debt	205,943		205,943		487,472
Consolidations And Eliminations [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	(65,714)	(60,773)	(190,786)	(172,719)
Depreciation and amortization	(207)	(207)	(621)	(621)
Income (loss) from operations	(538)	(548)	(1,564)	(1,588)
Property, Plant and Equipment, Additions	0	0	0	0
Cash, Cash Equivalents, And Investments In Marketable Securities	0		0		0
Assets	(330,207)		(330,207)		(332,642)
Long-term Debt	(15,450)		(15,450)		(15,907)
HEP [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	77,625	72,570	229,230	207,250
Depreciation and amortization	19,042	12,971	48,410	38,683
Income (loss) from operations	34,481	36,876	102,347	100,918
Property, Plant and Equipment, Additions	14,238	5,683	31,099	29,302
Cash, Cash Equivalents, And Investments In Marketable Securities	11,220		11,220		5,237
Assets	1,413,368		1,413,368		1,426,800
Long-term Debt	$ 809,391		$ 809,391		$ 864,673
UNEV Pipeline [Member]
Segment Reporting Information [Line Items]
Percentage of interest owned in pipeline project	75.00%