Holly-Frontier Merger (Schedule Of Pro Forma Revenues And Net Income) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2011
Business Combination, Description [Abstract]
Sales and other revenues	$ 14,446,297
Net income attributable to HollyFrontier stockholders	$ 1,118,018
Basic earnings per share	$ 5.34
Diluted earnings per share	$ 5.31