Supplemental Guarantor/Non-Guarantor Financial Information Consolidating Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	$ 594,092	$ 567,985	$ 1,074,635	$ 940,103
Marketable securities	414,507	474,110
Accounts receivable, net	526,853us-gaap_AccountsReceivableNetCurrent	589,905us-gaap_AccountsReceivableNetCurrent
Intercompany accounts receivable	0us-gaap_DueFromAffiliateCurrent	0us-gaap_DueFromAffiliateCurrent
Inventories	1,115,678us-gaap_InventoryNet	1,035,131us-gaap_InventoryNet
Income taxes receivable	0us-gaap_IncomeTaxesReceivable	11,719us-gaap_IncomeTaxesReceivable
Prepayments and other	64,648us-gaap_OtherAssetsCurrent	104,148us-gaap_OtherAssetsCurrent
Total current assets	2,715,778us-gaap_AssetsCurrent	2,782,998us-gaap_AssetsCurrent
Properties, plants and equipment, net	3,781,160us-gaap_PropertyPlantAndEquipmentNet	3,670,539us-gaap_PropertyPlantAndEquipmentNet
Investment in subsidiaries	0	0
Intangibles and other assets	2,765,189hfc_IntangiblesAndOtherAssets	2,777,103hfc_IntangiblesAndOtherAssets
Total assets	9,262,127us-gaap_Assets	9,230,640us-gaap_Assets
Accounts payable	930,909us-gaap_AccountsPayableCurrent	1,108,138us-gaap_AccountsPayableCurrent
Due to Affiliate, Current	0us-gaap_DueToAffiliateCurrent	0us-gaap_DueToAffiliateCurrent
Accrued Income Taxes	112,016us-gaap_AccruedIncomeTaxes	19,642us-gaap_AccruedIncomeTaxes
Accrued liabilities	112,975us-gaap_AccruedLiabilitiesCurrent	106,214us-gaap_AccruedLiabilitiesCurrent
Deferred income tax liabilities	16,503us-gaap_DeferredTaxLiabilitiesCurrent	17,409us-gaap_DeferredTaxLiabilitiesCurrent
Total current liabilities	1,172,403us-gaap_LiabilitiesCurrent	1,251,403us-gaap_LiabilitiesCurrent
Long-term debt	1,077,369us-gaap_LongTermDebtNoncurrent	1,054,890us-gaap_LongTermDebtNoncurrent
Liability to HEP	0hfc_LiabilityToHep	0hfc_LiabilityToHep
Deferred income tax liabilities	631,030	646,870
Other long-term liabilities	181,822us-gaap_OtherLiabilitiesNoncurrent	176,758us-gaap_OtherLiabilitiesNoncurrent
Investment in HEP	0us-gaap_EquityMethodInvestments	0us-gaap_EquityMethodInvestments
Equity – HollyFrontier	5,626,846us-gaap_StockholdersEquity	5,523,584us-gaap_StockholdersEquity
Equity – noncontrolling interest	572,657us-gaap_MinorityInterest	577,135us-gaap_MinorityInterest
Total liabilities and equity	9,262,127	9,230,640
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	588,246	565,080	1,067,578	931,920
Marketable securities	414,507	474,068
Accounts receivable, net	9,538	5,107
Intercompany accounts receivable	0	0
Inventories	0	0
Income taxes receivable		11,719
Prepayments and other	13,308	14,734
Total current assets	1,025,599	1,070,708
Properties, plants and equipment, net	32,610	31,808
Investment in subsidiaries	6,280,300	5,912,233
Intangibles and other assets	30,178	30,082
Total assets	7,368,687	7,044,831
Accounts payable	2,852	11,457
Due to Affiliate, Current	721,937	568,881
Accrued Income Taxes	112,016	19,642
Accrued liabilities	39,545	41,403
Deferred income tax liabilities	16,503	17,409
Total current liabilities	892,853	658,792
Long-term debt	178,908	179,144
Liability to HEP	0	0
Deferred income tax liabilities	630,610	646,503
Other long-term liabilities	43,994	43,451
Investment in HEP	0	0
Equity – HollyFrontier	5,622,322	5,516,941
Equity – noncontrolling interest	0	0
Total liabilities and equity	7,368,687	7,044,831
Guarantor Restricted Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	2,055	1,817
Marketable securities	0	42
Accounts receivable, net	518,569	579,526
Intercompany accounts receivable	300,829	171,341
Inventories	1,113,717	1,033,191
Income taxes receivable		0
Prepayments and other	53,708	95,194
Total current assets	1,986,823	1,879,294
Properties, plants and equipment, net	2,956,913	2,873,350
Investment in subsidiaries	323,760	291,912
Intangibles and other assets	2,378,469	2,388,844
Total assets	7,645,965	7,433,400
Accounts payable	951,974	1,117,429
Due to Affiliate, Current	0	0
Accrued Income Taxes	0	0
Accrued liabilities	59,500	45,331
Deferred income tax liabilities	0	0
Total current liabilities	1,011,474	1,162,760
Long-term debt	32,719	33,167
Liability to HEP	230,374	233,217
Deferred income tax liabilities	0	0
Other long-term liabilities	91,098	92,023
Investment in HEP	0	0
Equity – HollyFrontier	6,280,300	5,912,233
Equity – noncontrolling interest	0	0
Total liabilities and equity	7,645,965	7,433,400
Non Guarantor Restricted Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	44	75	123	14
Marketable securities	0	0
Accounts receivable, net	11,299	3,774
Intercompany accounts receivable	421,108	397,540
Inventories	0	0
Income taxes receivable		0
Prepayments and other	0	0
Total current assets	432,451	401,389
Properties, plants and equipment, net	950	902
Investment in subsidiaries	0	0
Intangibles and other assets	25,000	25,000
Total assets	458,401	427,291
Accounts payable	0	2
Due to Affiliate, Current	0	0
Accrued Income Taxes	0	0
Accrued liabilities	1,955	1,382
Deferred income tax liabilities	0	0
Total current liabilities	1,955	1,384
Long-term debt	0	0
Liability to HEP	0	0
Deferred income tax liabilities	0	0
Other long-term liabilities	0	0
Investment in HEP	132,686	133,995
Equity – HollyFrontier	323,760	291,912
Equity – noncontrolling interest	0	0
Total liabilities and equity	458,401	427,291
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	0	0
Marketable securities	0	0
Accounts receivable, net	0	0
Intercompany accounts receivable	(721,937)	(568,881)
Inventories	0	0
Income taxes receivable		0
Prepayments and other	0	0
Total current assets	(721,937)	(568,881)
Properties, plants and equipment, net	0	0
Investment in subsidiaries	(6,604,060)	(6,204,145)
Intangibles and other assets	(25,000)	(25,000)
Total assets	(7,350,997)	(6,798,026)
Accounts payable	0	0
Due to Affiliate, Current	(721,937)	(568,881)
Accrued Income Taxes	0	0
Accrued liabilities	0	0
Deferred income tax liabilities	0	0
Total current liabilities	(721,937)	(568,881)
Long-term debt	(25,000)	(25,000)
Liability to HEP	0	0
Deferred income tax liabilities	0	0
Other long-term liabilities	0	0
Investment in HEP	0	0
Equity – HollyFrontier	(6,604,060)	(6,204,145)
Equity – noncontrolling interest	0	0
Total liabilities and equity	(7,350,997)	(6,798,026)
Holly Frontier Corp. Before Consolidation Of HEP [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	588,290	565,155	1,069,756	933,751
Marketable securities	414,507	474,110
Accounts receivable, net	539,406	588,407
Intercompany accounts receivable	0	0
Inventories	1,113,717	1,033,191
Income taxes receivable		11,719
Prepayments and other	67,016	109,928
Total current assets	2,722,936	2,782,510
Properties, plants and equipment, net	2,990,473	2,906,060
Investment in subsidiaries	0	0
Intangibles and other assets	2,408,647	2,418,926
Total assets	8,122,056	8,107,496
Accounts payable	954,826	1,128,888
Due to Affiliate, Current	0	0
Accrued Income Taxes	112,016	19,642
Accrued liabilities	101,000	88,116
Deferred income tax liabilities	16,503	17,409
Total current liabilities	1,184,345	1,254,055
Long-term debt	186,627	187,311
Liability to HEP	230,374	233,217
Deferred income tax liabilities	630,610	646,503
Other long-term liabilities	135,092	135,474
Investment in HEP	132,686	133,995
Equity – HollyFrontier	5,622,322	5,516,941
Equity – noncontrolling interest	0	0
Total liabilities and equity	8,122,056	8,107,496
Non-Guarantor Non-Restricted Subsidiaries (HEP Segment) [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	5,802	2,830	4,879	6,352
Marketable securities	0	0
Accounts receivable, net	39,855	40,129
Intercompany accounts receivable	0	0
Inventories	1,961	1,940
Income taxes receivable		0
Prepayments and other	2,428	2,443
Total current assets	50,046	47,342
Properties, plants and equipment, net	1,046,987	1,024,311
Investment in subsidiaries	0	0
Intangibles and other assets	360,986	362,919
Total assets	1,458,019	1,434,572
Accounts payable	28,491	17,881
Due to Affiliate, Current	0	0
Accrued Income Taxes		0
Accrued liabilities	16,771	26,321
Deferred income tax liabilities	0	0
Total current liabilities	45,262	44,202
Long-term debt	890,742	867,579
Liability to HEP	0	0
Deferred income tax liabilities	420	367
Other long-term liabilities	52,322	47,170
Investment in HEP	0	0
Equity – HollyFrontier	373,154	380,172
Equity – noncontrolling interest	96,119	95,082
Total liabilities and equity	1,458,019	1,434,572
Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Cash and cash equivalents	0	0	0	0
Marketable securities	0	0
Accounts receivable, net	(52,408)	(38,631)
Intercompany accounts receivable	0	0
Inventories	0	0
Income taxes receivable		0
Prepayments and other	(4,796)	(8,223)
Total current assets	(57,204)	(46,854)
Properties, plants and equipment, net	(256,300)	(259,832)
Investment in subsidiaries	0	0
Intangibles and other assets	(4,444)	(4,742)
Total assets	(317,948)	(311,428)
Accounts payable	(52,408)	(38,631)
Due to Affiliate, Current	0	0
Accrued Income Taxes	0	0
Accrued liabilities	(4,796)	(8,223)
Deferred income tax liabilities	0	0
Total current liabilities	(57,204)	(46,854)
Long-term debt	0	0
Liability to HEP	(230,374)	(233,217)
Deferred income tax liabilities	0	0
Other long-term liabilities	(5,592)	(5,886)
Investment in HEP	(132,686)	(133,995)
Equity – HollyFrontier	(368,630)	(373,529)
Equity – noncontrolling interest	476,538	482,053
Total liabilities and equity	$ (317,948)	$ (311,428)

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Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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Carrying amount as of the balance sheet date of the unpaid sum of the known and estimated amounts payable to satisfy all domestic and foreign income tax obligations due. This amount is the total of current and noncurrent accrued income taxes.

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Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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