Line of Credit Facility, Accordion Feature

No definition available.

Name:	hfc_LineofCreditFacilityAccordionFeature
Namespace Prefix:	hfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Senior Notes Aggregate Redemption Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	hfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

+ Details

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Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Gross amount of debt extinguished.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 50
-Section 40
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The maximum amount of borrowing capacity under a line of credit that is available as of the balance sheet date for financing purchases of goods acquired for inventory or imminent delivery to a customer.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCapacityAvailableForTradePurchases
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

+ Details

Name:	us-gaap_LongTermDebtNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Cash received from principal payments made on loans related to operating activities.

+ References

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-SubTopic 10
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from sale of machinery and equipment.

+ References

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-Name Accounting Standards Codification
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-SubTopic 10
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The excess of the (1) fair value of consideration transferred to the holders of a security in excess of (2) the carrying amount of the security reported on the registrant's balance sheet, which will be deducted from net earnings to derive net earnings available to common shareholders. This amount is generally an adjustment considered in the computation of earnings per share.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash outflow for the payment of debt classified as other, maturing after one year or the operating cycle, if longer.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Subparagraph (SX 210.7-03.16(a))
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Balance Type:
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- Details

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- Details

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- Details

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Debt (Narrative) (Details) - USD ($)		3 Months Ended				9 Months Ended	12 Months Ended
Debt (Narrative) (Details) - USD ($)	Apr. 29, 2016	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 31, 2017	Nov. 30, 2016	Sep. 30, 2016	Jul. 31, 2016	Mar. 31, 2016	Jun. 30, 2015
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement		$ 1,350,000,000					$ 1,350,000,000
Line of Credit Facility, Expiration Date		Feb. 01, 2022
Proceeds from Lines of Credit							26,000,000
Repayments of Lines of Credit							(26,000,000)
Letters of Credit Outstanding, Amount		$ 2,800,000					$ 2,800,000
Effective interest rate on debt		0.00%					0.00%	2.98%
Long-term debt		$ 2,498,993,000					$ 2,498,993,000	$ 2,235,137,000
Loss on early extinguishment of debt							(12,225,000)	(8,718,000)	$ (1,370,000)
Repayment of term loan			$ 39,500,000		$ 39,500,000		$ 0	350,000,000	$ 0
Proceeds from Loans	$ 350,000,000
Debt Instrument, Maturity Date							Apr. 01, 2026
Senior Notes, Noncurrent											$ 750,000,000			$ 250,000,000
Plains [Member] \| Lease [Member]
Debt Instrument [Line Items]
Loss on early extinguishment of debt						$ 8,700,000
Proceeds from Sale of Machinery and Equipment						$ 40,000,000
HEP
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement		1,400,000,000					$ 1,400,000,000
Proceeds from Lines of Credit							969,000,000
Repayments of Lines of Credit							(510,000,000)
Borrowings outstanding under revolving credit agreement		1,012,000,000					1,012,000,000	553,000,000
Senior notes		525,120,000					525,120,000	723,750,000
Loss on early extinguishment of debt					8,700,000
Extinguishment of Debt, Amount					$ 30,800,000
Nine Point Eight Seven Five Percentage Senior Notes Due Two Thousand Seventeen Member
Debt Instrument [Line Items]
Stated interest rate, senior notes															9.875%
Letter of Credit [Member] \| HEP
Debt Instrument [Line Items]
Line of Credit Facility, Accordion Feature		$ 300,000,000					300,000,000
Line of Credit Facility, Expiration Date		Jul. 01, 2022
Line of Credit Facility, Capacity Available for Trade Purchases		$ 50,000,000					50,000,000
Five Point Eight Seven Five Percentage Senior Notes Due Two Thousand Twenty-Six [Member] [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes					5.875%
Senior notes		1,113,470,000					1,113,470,000	1,022,500,000
Senior Notes, Noncurrent		1,000,000,000					1,000,000,000	1,000,000,000
Debt Instrument, Unamortized Discount		$ 8,315,000					$ 8,315,000	8,775,000
6.875% Senior Notes Due 2018
Debt Instrument [Line Items]
Stated interest rate, senior notes		6.875%		6.875%			6.875%
Loss on early extinguishment of debt				$ 1,400,000
Redemption premium on early extinguishment of debt				(5,200,000)
Amortization of Debt Discount (Premium)				3,800,000
Senior Notes, Noncurrent				150,000,000
Extinguishment of Debt, Amount				$ 155,200,000
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date						Apr. 01, 2019
8.25% Senior Notes Due 2018 \| HEP
Debt Instrument [Line Items]
Stated interest rate, senior notes		8.25%					8.25%
6.5% Senior Notes Due 2020 \| HEP
Debt Instrument [Line Items]
Stated interest rate, senior notes		6.50%					6.50%
Long-term debt								297,519,000
Loss on early extinguishment of debt					$ 12,200,000
Redemption premium on early extinguishment of debt					9,800,000
Senior Notes					$ 300,000,000
Senior Notes Aggregate Redemption Amount										$ 309,800,000
Debt Instrument, Maturity Date						Mar. 01, 2020
Senior Notes, Noncurrent								300,000,000
Debt Instrument, Unamortized Discount								2,481,000		$ 2,400,000
Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes		6.00%					6.00%
Six Percent Senior Notes Due Two Thousand Twenty Four [Member] [Member] \| HEP
Debt Instrument [Line Items]
Stated interest rate, senior notes		6.00%					6.00%
Debt Instrument, Maturity Date							Aug. 01, 2024
Senior Notes, Noncurrent		$ 500,000,000					$ 500,000,000	400,000,000				$ 100,000,000	$ 400,000,000
Debt Instrument, Unamortized Discount		$ 4,692,000					$ 4,692,000	$ 6,607,000