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 equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

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Period Type:	instant

- Definition

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

+ References

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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.

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Period Type:	duration

- Definition

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

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- Definition

Amount, after accumulated amortization, of debt discount.

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- Definition

Gross amount of debt extinguished.

+ References

No definition available.

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- Definition

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

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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

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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.

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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
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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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Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

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Data Type:	num:percentItemType
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

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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

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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

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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.

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Balance Type:	debit
Period Type:	duration

- Definition

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

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Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from sale of machinery and equipment.

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- 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.

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- 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.

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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.

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- Definition

Amount of cash inflow after closing and debt issuance costs received by a seller-lessee in a sale-leaseback recognized in financing activities.

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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

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- 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.

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Debt (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended					12 Months Ended
Debt (Narrative) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 30, 2017	Jan. 31, 2017	Jul. 31, 2016
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement	$ 1,350,000					$ 1,350,000
Line of Credit Facility, Expiration Date	Feb. 01, 2022
Letters of Credit Outstanding, Amount	$ 2,200					$ 2,200
Effective interest rate on debt	0.00%					0.00%	3.73%
Sale Leaseback Transaction, Net Proceeds, Financing Activities	$ 32,500
Capital Lease Obligations	32,900					$ 32,900
Long-term debt	2,411,540					2,411,540	$ 2,498,993
Loss on early extinguishment of debt					$ 8,700	0	(12,225)	$ (8,718)
Proceeds from Sale of Machinery and Equipment					40,000
Repayment of term loan - HFC		$ 39,500			39,500	0	0	350,000
Proceeds from Loans				$ 350,000
Senior Notes					$ 250,000			$ 750,000
HEP
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement	1,400,000					1,400,000
Proceeds from Lines of Credit						337,000
Repayments of Lines of Credit						426,000
Borrowings outstanding under revolving credit agreement	923,000					923,000	1,012,000
Senior notes	488,310					488,310	525,120
Loss on early extinguishment of debt		8,700
Extinguishment of Debt, Amount		$ 30,800
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					300,000
Line of Credit Facility, Expiration Date	Jul. 01, 2022
Line of Credit Facility, Capacity Available for Trade Purchases	$ 50,000					50,000
Five Point Eight Seven Five Percentage Senior Notes Due Two Thousand Twenty-Six [Member] [Member]
Debt Instrument [Line Items]
Stated interest rate, senior notes		0.00%
Senior notes	1,019,160					1,019,160	1,113,470
Senior Notes, Noncurrent	1,000,000					1,000,000	1,000,000
Debt Instrument, Unamortized Discount	$ 7,360					$ 7,360	8,315
6.875% Senior Notes Due 2018
Debt Instrument [Line Items]
Stated interest rate, senior notes	6.875%					6.875%
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%
Loss on early extinguishment of debt			$ 12,200
Redemption premium on early extinguishment of debt			9,800
Senior Notes			$ 300,000
Senior Notes Aggregate Redemption Amount										$ 309,800
Debt Instrument, Maturity Date			Mar. 01, 2020
Debt Instrument, Unamortized Discount										$ 2,400
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					$ 500,000	500,000		$ 100,000		$ 400,000
Debt Instrument, Unamortized Discount	$ 4,100					$ 4,100	$ 4,692
Alternative A [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate During Period						0.125%
Alternative A [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate During Period						1.00%
Alternative B [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate During Period						1.125%
Alternative B [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate During Period						2.00%
Alternative C [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate During Period						1.125%
Alternative C [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Interest Rate During Period						2.00%