Equity (Changes To Equity) (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2014	$ 5,523,584,000
Net income	242,661,000		163,962,000
Other comprehensive income, after tax	(11,976,000)		53,300,000
Payments for Repurchase of Common Stock	55,065,000		13,988,000
Balance at March 31, 2015	5,626,846,000
Shares Paid for Tax Withholding for Share Based Compensation	1,215
Remaining stock repurchase authorization	500
Treasury Stock Acquired Remaining Authorization	461,500,000
Holly Corporation Stockholders' Equity [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2014	5,523,584,000
Net income	226,876,000
Dividends	(62,745,000)
Distributions to noncontrolling interest holders	0
Other comprehensive income, after tax	(11,522,000)
Equity-based compensation	6,329,000
Excess tax benefit attributable to equity-based compensation	(570,000)
Payments for Repurchase of Common Stock	(55,106,000)	[1]
Purchase of units for incentive grants - HEP	0
Other	0
Balance at March 31, 2015	5,626,846,000
Noncontrolling Interest [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2014	577,135,000
Net income	15,785,000
Dividends	0
Distributions to noncontrolling interest holders	(20,472,000)
Other comprehensive income, after tax	(454,000)
Equity-based compensation	896,000
Excess tax benefit attributable to equity-based compensation	0
Payments for Repurchase of Common Stock	0	[1]
Purchase of units for incentive grants - HEP	(247,000)
Other	14,000
Balance at March 31, 2015	572,657,000
Total Equity [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at December 31, 2014	6,100,719,000
Net income	242,661,000
Dividends	(62,745,000)
Distributions to noncontrolling interest holders	(20,472,000)
Other comprehensive income, after tax	(11,976,000)
Equity-based compensation	7,225,000
Excess tax benefit attributable to equity-based compensation	(570,000)
Payments for Repurchase of Common Stock	(55,106,000)	[1]
Purchase of units for incentive grants - HEP	(247,000)
Other	14,000
Balance at March 31, 2015	$ 6,199,503,000

[1] Includes 1,215 shares withheld under the terms of stock-based compensation agreements to provide funds for the payment of payroll and income taxes due at the vesting of share-based awards.