Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents (HEP: $5,802 and $2,830, respectively)	$ 594,092	$ 567,985
Marketable securities	414,507	474,110
Total cash, cash equivalents and short-term marketable securities	1,008,599	1,042,095
Accounts receivable: Product and transportation (HEP: $39,855 and $40,129, respectively)	504,864	507,040
Crude oil resales	21,989	82,865
Accounts receivable, total	526,853	589,905
Inventories: Crude oil and refined products	998,936	920,104
Materials and supplies (HEP: $1,961 and $1,940, respectively)	116,742	115,027
Inventories, total	1,115,678	1,035,131
Income taxes receivable	0	11,719
Prepayments and other (HEP: $2,428 and $2,443, respectively)	64,648	104,148
Total current assets	2,715,778	2,782,998
Properties, plants and equipment, at cost (HEP: $1,305,065 and $1,269,161, respectively)	5,011,673	4,852,441
Less accumulated depreciation (HEP: $(258,078) and $(244,850), respectively)	(1,230,513)	(1,181,902)
Property, plants and equipment, net	3,781,160	3,670,539
Other Deferred Costs, Net	254,639	257,153
Goodwill (HEP: $288,991 and $288,991, respectively)	2,331,781	2,331,781
Intangibles and other (HEP: $71,995 and $73,928, respectively)	178,769	188,169
Other assets, total	2,765,189	2,777,103
Total assets	9,262,127	9,230,640
Current liabilities:
Accounts payable (HEP: $28,491 and $17,881, respectively)	930,909	1,108,138
Income taxes payable	112,016	19,642
Accrued liabilities (HEP: $16,771 and $26,321, respectively)	112,975	106,214
Deferred income tax liabilities	16,503	17,409
Total current liabilities	1,172,403	1,251,403
Long-term debt (HEP: $890,742 and $867,579, respectively)	1,077,369	1,054,890
Deferred income taxes (HEP: $420 and $367, respectively)	631,030	646,870
Other long-term liabilities (HEP: $52,322 and $47,170, respectively)	181,822	176,758
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 March 31, 2015 and December 31, 2014	2,560	2,560
Additional capital	4,009,507	4,003,628
Retained earnings	2,942,707	2,778,577
Accumulated other comprehensive income (loss)	16,372	27,894
Common stock held in treasury, at cost - 61,260,342 and 59,876,776 shares as of March 31, 2015 and December 31, 2014, respectively	(1,344,300)	(1,289,075)
Total HollyFrontier stockholders' equity	5,626,846	5,523,584
Noncontrolling interest	572,657	577,135
Total equity	6,199,503	6,100,719
Total liabilities and equity	9,262,127	9,230,640
HEP [Member]
Current assets:
Cash and cash equivalents (HEP: $5,802 and $2,830, respectively)	5,802	2,830
Total cash, cash equivalents and short-term marketable securities	5,802	2,830
Accounts receivable: Product and transportation (HEP: $39,855 and $40,129, respectively)	39,855	40,129
Materials and supplies (HEP: $1,961 and $1,940, respectively)	1,961	1,940
Prepayments and other (HEP: $2,428 and $2,443, respectively)	2,428	2,443
Properties, plants and equipment, at cost (HEP: $1,305,065 and $1,269,161, respectively)	1,305,065	1,269,161
Less accumulated depreciation (HEP: $(258,078) and $(244,850), respectively)	(258,078)	(244,850)
Goodwill (HEP: $288,991 and $288,991, respectively)	288,991	288,991
Intangibles and other (HEP: $71,995 and $73,928, respectively)	71,995	73,928
Total assets	1,458,019	1,434,572
Current liabilities:
Accounts payable (HEP: $28,491 and $17,881, respectively)	28,491	17,881
Accrued liabilities (HEP: $16,771 and $26,321, respectively)	16,771	26,321
Long-term debt (HEP: $890,742 and $867,579, respectively)	890,742	867,579
Deferred income taxes (HEP: $420 and $367, respectively)	420	367
Other long-term liabilities (HEP: $52,322 and $47,170, respectively)	$ 52,322	$ 47,170