Earnings Per Share (Schedule Of Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Earnings Per Share [Abstract]
Earnings attributable to HollyFrontier stockholders	$ 62,902	$ 82,290	$ 256,981	$ 333,669	$ 391,604	$ 600,373	$ 493,499	$ 241,696	$ 735,842		$ 1,727,172		$ 1,023,397
Participating securities' share in earnings									2,754		7,648		3,474
Net income attributable to common shares									$ 733,088		$ 1,719,524		$ 1,019,923
Average number of shares of common stock outstanding	198,371	199,098	201,543	202,726	202,480	202,655	204,787	207,681	200,419		204,379		157,948
Effect of dilutive stock options, variable restricted shares and performance share units									815	[1]	895	[1]	808	[1]
Average number of shares of common stock outstanding assuming dilution	199,311	199,509	201,905	203,428	203,498	203,532	205,541	208,288	201,234		205,274		158,756
Net income per share attributable to HollyFrontier stockholders - basic (in dollars per share)	$ 0.32	$ 0.41	$ 1.27	$ 1.64	$ 1.92	$ 2.95	$ 2.40	$ 1.16	$ 3.66		$ 8.41		$ 6.46
Net income per share attributable to HollyFrontier stockholders - diluted (in dollars per share)	$ 0.31	$ 0.41	$ 1.27	$ 1.63	$ 1.92	$ 2.94	$ 2.39	$ 1.16	$ 3.64		$ 8.38		$ 6.42
Antidilutive securities excluded from computation of earnings per share (in shares)									166		166		0

[1] Excludes anti-dilutive restricted and performance share units