Other Comprehensive Income (Loss) (Components And Allocated Tax Effects Of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Comprehensive Income (Loss) Components and Tax Effects [Line Items]
Net change in foreign currency translation adjustment, before Tax	$ 9,160		$ (11,503)		$ 13,523	$ (23,443)
Net unrealized gain (loss) on hedging instruments	(6,014)		1,521		7,934	(3,995)
Net change in foreign currency translation adjustment, tax	1,950		(2,422)		2,855	(4,886)
Net unrealized gain (loss) on hedging instruments, tax expense (benefit)	(1,534)		388		2,023	(1,024)
Net change in foreign currency translation, net of tax	7,210		(9,081)		10,668	(18,557)
Net unrealized gain (loss) on hedging instruments, after tax	(4,480)		1,133		5,911	(2,971)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	74
Other comprehensive income (loss) attributable to HollyFrontier stockholders			(7,948)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax	74
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, Tax	0
Other Comprehensive Income (Loss), before Tax	3,220		(9,982)		21,457	(27,438)
Other Comprehensive Income (Loss), Tax	416		(2,034)		4,878	(5,910)
Other comprehensive income (loss), net of tax	$ 2,804	$ 13,775	$ (7,948)	$ (13,580)	$ 16,579	$ (21,528)