v2.4.0.8
Document and Entity Information
6 Months Ended
Jun. 30, 2013
Jul. 18, 2013
Document Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2013  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q2  
Entity Registrant Name CONSOL Energy Inc  
Entity Central Index Key 0001070412  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   228,848,942