Consolidated Balance Sheets (USD $)	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents (HEP: $4,216 and $3,269, respectively)	$ 1,372,198,000	$ 1,578,904,000
Marketable securities	266,483,000	211,639,000
Accounts receivable: Product and transportation (HEP: $30,169 and $34,071, respectively)	578,024,000	703,691,000
Crude oil resales	25,702,000	5,166,000
Accounts receivable, total	603,726,000	708,857,000
Inventories: Crude oil and refined products	1,253,807,000	1,052,084,000
Materials and supplies (HEP: $1,326 and $1,483, respectively)	56,012,000	62,535,000
Inventories, total	1,309,819,000	1,114,619,000
Income taxes receivable	93,648,000	87,277,000
Prepayments and other (HEP: $2,084 and $1,161, respectively)	59,818,000	219,450,000
Total current assets	3,705,692,000	3,920,746,000
Properties, plants and equipment, at cost (HEP: $689,381 and $679,852, respectively)	3,751,384,000	3,631,787,000
Less accumulated depreciation (HEP: $(104,679) and $(89,609), respectively)	(663,078,000)	(578,882,000)
Property, plant and equipment, net	3,088,306,000	3,052,905,000
Marketable securities (long-term)	9,765,000	50,067,000
Other assets: Turnaround costs	72,460,000	57,060,000
Goodwill (HEP: $288,991 and $288,991, respectively)	2,338,302,000	2,336,510,000
Intangibles and other (HEP: $77,182 and $75,902, respectively)	168,007,000	158,955,000
Other assets, total	2,578,769,000	2,552,525,000
Total assets	9,382,532,000	9,576,243,000
Current liabilities:
Accounts payable (HEP: $9,695 and $11,406, respectively)	1,096,216,000	1,504,694,000
Income taxes payable	162,265,000	40,366,000
Accrued liabilities (HEP: $17,749 and $16,285, respectively)	133,818,000	169,940,000
Deferred income tax liabilities	169,386,000	175,683,000
Total current liabilities	1,561,685,000	1,890,683,000
Long-term debt (HEP: $613,195 and $598,761, respectively)	1,295,163,000	1,214,742,000
Deferred income taxes	416,028,000	463,721,000
Other long-term liabilities (HEP: $6,195 and $4,000, respectively)	162,031,000	171,197,000
HollyFrontier stockholders' equity:
Preferred stock, $1.00 par value - 5,000,000 shares authorized; none issued	0	0
Common stock $.01 par value - 320,000,000 shares authorized; 255,962,866 shares issued as of June 30, 2012 and December 31, 2011	2,560,000	2,563,000
Additional capital	3,765,963,000	3,859,367,000
Retained earnings	2,440,448,000	1,964,656,000
Accumulated other comprehensive income (loss)	5,575,000	77,873,000
Common stock held in treasury, at cost - 52,346,837 and 46,630,220 shares as of June 30, 2012 and December 31, 2011, respectively	(885,085,000)	(700,449,000)
Total HollyFrontier stockholders' equity	5,329,461,000	5,204,010,000
Noncontrolling interest	618,164,000	631,890,000
Total equity	5,947,625,000	5,835,900,000
Total liabilities and equity	9,382,532,000	9,576,243,000
HEP [Member]
Current assets:
Cash and cash equivalents (HEP: $4,216 and $3,269, respectively)	4,216,000	3,269,000
Accounts receivable: Product and transportation (HEP: $30,169 and $34,071, respectively)	30,169,000	34,071,000
Materials and supplies (HEP: $1,326 and $1,483, respectively)	1,326,000	1,483,000
Prepayments and other (HEP: $2,084 and $1,161, respectively)	2,084,000	1,161,000
Properties, plants and equipment, at cost (HEP: $689,381 and $679,852, respectively)	689,381,000	679,852,000
Less accumulated depreciation (HEP: $(104,679) and $(89,609), respectively)	(104,679,000)	(89,609,000)
Goodwill (HEP: $288,991 and $288,991, respectively)	288,991,000	288,991,000
Intangibles and other (HEP: $77,182 and $75,902, respectively)	77,182,000	75,902,000
Total assets	988,670,000	995,120,000
Current liabilities:
Accounts payable (HEP: $9,695 and $11,406, respectively)	9,695,000	11,406,000
Accrued liabilities (HEP: $17,749 and $16,285, respectively)	17,749,000	16,285,000
Long-term debt (HEP: $613,195 and $598,761, respectively)	613,195,000	598,761,000
Other long-term liabilities (HEP: $6,195 and $4,000, respectively)	$ 6,195,000	$ 4,000,000