Segment Information (Schedule Of Segment Reporting Information) (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011		Dec. 31, 2011
Segment Reporting Information [Line Items]
Sales and other revenues	$ 4,806,681,000		$ 2,967,133,000		$ 9,738,419,000		$ 5,293,718,000
Depreciation and amortization	56,948,000		31,832,000		113,050,000		63,140,000
Income (loss) from operations	813,137,000		330,179,000		1,232,701,000		489,278,000
Capital expenditures	66,633,000		82,267,000		128,020,000		156,305,000
Cash, cash equivalents and investments in marketable securities	1,648,446,000				1,648,446,000				1,840,610,000
Total assets	9,382,532,000				9,382,532,000				9,576,243,000
Long-term debt, including current portion	1,295,163,000				1,295,163,000				1,214,742,000
Refining [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	4,795,469,000	[1]	2,953,226,000	[1]	9,715,200,000	[1]	5,268,318,000	[1]
Depreciation and amortization	43,665,000	[1]	23,478,000	[1]	85,197,000	[1]	46,461,000	[1]
Income (loss) from operations	812,936,000	[1]	321,032,000	[1]	1,228,062,000	[1]	473,136,000	[1]
Capital expenditures	56,262,000	[1]	25,152,000	[1]	101,796,000	[1]	45,784,000	[1]
Cash, cash equivalents and investments in marketable securities	19,000	[1]			19,000	[1]			0	[1]
Total assets	7,213,749,000	[1]			7,213,749,000	[1]			6,280,426,000	[1]
Long-term debt, including current portion	0	[1]			0	[1]			0	[1]
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	4,411,000		153,000		8,635,000		801,000
Depreciation and amortization	4,762,000		1,252,000		9,680,000		2,549,000
Income (loss) from operations	(33,756,000)		(18,040,000)		(63,505,000)		(34,138,000)
Capital expenditures	4,690,000		45,690,000		14,216,000		87,621,000
Cash, cash equivalents and investments in marketable securities	1,644,211,000				1,644,211,000				1,837,341,000
Total assets	1,222,787,000				1,222,787,000				2,421,140,000
Long-term debt, including current portion	698,156,000				698,156,000				705,331,000
Consolidations And Eliminations [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	(56,891,000)		(37,186,000)		(112,623,000)		(71,346,000)
Depreciation and amortization	(207,000)		(207,000)		(414,000)		(414,000)
Income (loss) from operations	(597,000)		(505,000)		(1,039,000)		(1,023,000)
Capital expenditures	0		0		0		0
Cash, cash equivalents and investments in marketable securities	0				0				0
Total assets	(42,674,000)				(42,674,000)				(120,443,000)
Long-term debt, including current portion	(16,188,000)				(16,188,000)				(89,350,000)
HEP [Member]
Segment Reporting Information [Line Items]
Sales and other revenues	63,692,000		50,940,000		127,207,000		95,945,000
Depreciation and amortization	8,728,000		7,309,000		18,587,000		14,544,000
Income (loss) from operations	34,554,000		27,692,000		69,183,000		51,303,000
Capital expenditures	5,681,000		11,425,000		12,008,000		22,900,000
Cash, cash equivalents and investments in marketable securities	4,216,000				4,216,000				3,269,000
Total assets	988,670,000				988,670,000				995,120,000
Long-term debt, including current portion	613,195,000				613,195,000				598,761,000
Segment revenues from external customers	$ 9,500,000		$ 13,800,000		$ 20,200,000		$ 24,700,000

[1] The Refining segment reflects the operations of the El Dorado and Cheyenne Refineries beginning July 1, 2011 (date of Holly-Frontier merger).