Holly-Frontier Merger (Schedule Of Pro Forma Revenues And Net Income) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2011
Business Combination, Description [Abstract]
Sales and other revenues	$ 5,037,660	$ 9,272,899
Net income attributable to HollyFrontier stockholders	$ 369,039	$ 603,105
Basic earnings per share	$ 1.76	$ 2.88
Diluted earnings per share	$ 1.75	$ 2.87