Acquisitions and Dispositions (Tables)

12 Months Ended

Dec. 31, 2011

Noble JV[Member] [Member]

Business Acquisition [Line Items]

Business Acquisition, Pro Forma Information

	Year Ended
	December 31,
	2011		2010
Total Revenue and Other Income	$	6,073,904	$	5,212,597
Earnings Before Income Taxes	$	775,807	$	465,740
Net Income Attributable to CONSOL Energy Inc. Shareholders	$	623,114	$	345,169
Basic Earnings Per Share	$	2.75	$	1.60
Dilutive Earnings Per Share	$	2.72	$	1.59

Dominion Acquisition Member

Business Acquisition [Line Items]

Schedule of Purchase Price Allocation [Table Text Block]

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Business Acquisition, Pro Forma Information

	Year
	Ended
	December 31,
	2010
Total Revenue and Other Income	$	5,303,008
Earnings Before Income Taxes	$	414,205
Net Income Attributable to CONSOL Energy Inc. Shareholders	$	314,760
Basic Earnings Per Share	$	1.39
Dilutive Earnings Per Share	$	1.38