Debt (Narrative) (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2020	Jun. 30, 2019	Feb. 04, 2020
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	$ 522,500,000
Loss on early extinguishment of debt	0		$ 0		$ (25,915,000)	$ 0
Maximum borrowing capacity under revolving credit agreement	1,350,000,000				1,350,000,000
Letters of Credit Outstanding, Amount	4,900,000				4,900,000
Proceeds from Long-term Lines of Credit					168,000,000.0	175,000,000
Repayments of Long-term Lines of Credit					138,500,000	156,500,000
Borrowings outstanding under revolving credit agreement		$ 965,500,000
Sale Leaseback Transaction, Net Proceeds, Financing Activities	35,000,000.0	40,000,000.0		$ 32,500,000
Capitalized Interest Costs	800,000		$ 500,000		1,400,000	$ 1,100,000
Debt Redemption Premium	22,500,000
Unamortized Discount (Premium) and Debt Issuance Costs, Net	$ 3,400,000				$ 3,400,000
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%				5.875%
Senior notes	$ 1,000,000,000	1,000,000,000			$ 1,000,000,000
Six Percent Senior Notes Due Two Thousand Twenty Four [Member]
Debt Instrument [Line Items]
Senior notes		$ 500,000,000
Debt Instrument, Interest Rate, Effective Percentage		6.00%
Five Percent Senior Notes Due Two Thousand Twenty Eight [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount							$ 500,000,000
Debt Instrument, Interest Rate, Effective Percentage							5.00%
HEP
Debt Instrument [Line Items]
Maximum borrowing capacity under revolving credit agreement	1,400,000,000				1,400,000,000
Line of Credit Facility, Capacity Available for Trade Purchases	50,000,000				50,000,000
Line of credit facility, accordion feature	$ 300,000,000				$ 300,000,000
HEP | Six Percent Senior Notes Due Two Thousand Twenty Four [Member]
Debt Instrument [Line Items]
Senior notes		$ 500,000,000