Other Comprehensive Income (Loss) (Components And Allocated Tax Effects Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other Comprehensive Income (Loss) Components and Tax Effects [Line Items]
Net change in foreign currency translation adjustment, before Tax	$ (11,940)	$ (6,713)
Net Unrealized Gain (Loss) on Marketable Securities		(4)
Net unrealized gain (loss) on hedging instruments	(5,570)	4,044
Other comprehensive income (loss)	(17,510)	(2,673)
Less other comprehensive income attributable to noncontrolling interest		50
Other comprehensive income (loss) attributable to HollyFrontier stockholders	(17,510)	(2,723)
Net change in foreign currency translation adjustment, tax	(2,528)	(1,779)
Net Unrealized Gain (loss) on Marketable Securities, Tax		(1)
Net unrealized gain (loss) on hedging instruments, tax expense (benefit)	(1,240)	1,545
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	(3,734)
Other comprehensive income (loss), tax expense	(7,502)	(235)
Other comprehensive income (loss) attributable to HollyFrontier stockholders, tax expense	(7,502)	(235)
Net change in foreign currency translation, net of tax	(9,412)	(4,934)
Net unrealized gain (loss) on marketable securities, after tax		(3)
Net unrealized gain (loss) on hedging instruments, after tax	(4,330)	2,499
Other Comprehensive Income (Loss) net Change in Pension and Other Post-retirement Benefits	3,734
Other comprehensive income (loss), net of tax	(10,008)	(2,438)
Less other comprehensive income (loss) attributable to noncontrolling interest, after tax		50
Other comprehensive income (loss) attributable to HollyFrontier stockholders	$ (10,008)	$ (2,488)