v2.4.0.6
Document and Entity Information
6 Months Ended
Jun. 30, 2010
Jul. 30, 2010
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2010  
Document Fiscal Year Focus 2010  
Document Fiscal Period Focus Q2  
Trading Symbol ED  
Entity Registrant Name CONSOLIDATED EDISON INC  
Entity Central Index Key 0001047862  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   282,632,105
CONSOLIDATED EDISON CO OF NEW YORK INC [Member]
   
Entity Registrant Name CONSOLIDATED EDISON CO OF NEW YORK INC  
Entity Central Index Key 0000023632  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer