XML 63 R1.htm IDEA: XBRL DOCUMENT v2.4.0.6
Document and Entity Information
3 Months Ended
Mar. 31, 2013
Apr. 26, 2013
Entity Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Mar. 31, 2013  
Document Fiscal Year Focus 2013  
Document Fiscal Period Focus Q1  
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   292,894,443
Consolidated Edison Co of New York Inc [Member]
   
Entity Information [Line Items]    
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