Earnings Per Share (Schedule Of Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
Earnings Per Share [Abstract]
Net income attributable to HollyFrontier stockholders	$ 175,006		$ 82,290		$ 503,496		$ 672,940
Participating Securities Share in Earnings	471		285		1,416		2,447
Net income attributable to common shares	$ 174,535		$ 82,005		$ 502,080		$ 670,493
Average number of shares of common stock outstanding	197,261		199,098		197,895		201,109
Effect of dilutive variable restricted shares and performance share units	274	[1]	411	[1]	201	[1]	377	[1]
Average number of shares of common stock outstanding assuming dilution	197,535		199,509		198,096		201,486
Basic earnings per share	$ 0.88		$ 0.41		$ 2.54		$ 3.33
Diluted earnings per share	$ 0.88		$ 0.41		$ 2.53		$ 3.33
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	195		251		214		1

[1] (1) Excludes anti-dilutive restricted and performance share units of: 195,000 251,000 214,000 1,000