Earnings Per Share (Schedule Of Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Earnings Per Share [Abstract]
Net income attributable to HollyFrontier stockholders	$ 176,429		$ 256,981		$ 328,490		$ 590,650
Participating Securities Share in Earnings	475		917		945		2,201
Net income attributable to common shares	$ 175,954		$ 256,064		$ 327,545		$ 588,449
Average number of shares of common stock outstanding	198,139,000		201,543,000		198,217,000		202,131,000
Effect of dilutive variable restricted shares and performance share units	241,000	[1]	362,000	[1]	191,000	[1]	354,000	[1]
Average number of shares of common stock outstanding assuming dilution	198,380,000		201,905,000		198,408,000		202,485,000
Basic earnings per share	$ 0.89		$ 1.27		$ 1.65		$ 2.91
Diluted earnings per share	$ 0.89		$ 1.27		$ 1.65		$ 2.91
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	26		232		2		248

[1] (1) Excludes anti-dilutive restricted and performance share units of: 26 232 2 248