Other Comprehensive Income (Loss) (Components And Allocated Tax Effects Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Other Comprehensive Income (Loss), before Tax [Abstract]
Other Comprehensive Income (Loss), Foreign currency translation adjustment	$ (38,227)	$ 22,151	$ 0
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax	(8,064)	7,774
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	(30,163)	14,377
Net unrealized gain (loss) on marketable securities, before tax		(4)	104
Net Unrealized gain (loss) on available-for-sale securities, tax expense (benefit)		(1)	40
Net unrealized gain (loss) on available-for-sale securities, after-tax		(3)	64
Net Unrealized Gain (Loss) on Hedging Activities, Before-Tax	11,221	14,447	25,040
Net Unrealized Gain (Loss) on Hedging Activities, Tax	2,857	5,613	9,713
Net Unrealized Gain (Loss) on Hedging Activities, Net of Tax	8,364	8,834	15,327
Net change in other post-retirement benefit obligations, before tax	(1,507)	(5,807)	(1,113)
Net change in other post-retirement benefit obligations, tax	(378)	(2,037)	(431)
Net change in other post-retirement benefit obligations, after tax	(1,129)	(3,770)	(682)
Other comprehensive income (loss) before income taxes	(28,513)	30,787	24,031
Other comprehensive income (loss), Tax Expense (Benefit)	(5,585)	11,349	9,322
Other comprehensive income (loss)	(22,928)	19,438	14,709
Less other comprehensive income (loss) attributable to noncontrolling interest, Before-Tax		(57)	(58)
Less other comprehensive income (loss) attributable to noncontrolling interest, Tax Expense (Benefit)		0	0
Less other comprehensive income (loss) attributable to noncontrolling interest, After-Tax		(57)	(58)
Other comprehensive income (loss) attributable to HollyFrontier stockholders, Before-Tax	(28,513)	30,844	24,089
Other comprehensive income (loss) attributable to HollyFrontier stockholders, Tax Expense (Benefit)	(5,585)	11,349	9,322
Other comprehensive income (loss) attributable to HollyFrontier stockholders, After-Tax	$ (22,928)	$ 19,495	$ 14,767