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
	Mar. 31, 2012
Business Combination, Description [Abstract]
Sales and other revenues	$ 4,235,239
Net income attributable to HollyFrontier stockholders	$ 234,066
Basic earnings per share	$ 1.12
Diluted earnings per share	$ 1.11