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CONSOLIDATED STATEMENT OF COMMON SHAREHOLDERS' EQUITY (USD $)
In Millions, except Share data
Total
CECONY [Member]
Common Stock [Member]
Common Stock [Member]
CECONY [Member]
Additional Paid-In Capital [Member]
Additional Paid-In Capital [Member]
CECONY [Member]
Retained Earnings [Member]
Retained Earnings [Member]
CECONY [Member]
Treasury Stock [Member]
Capital Stock Expense [Member]
Capital Stock Expense [Member]
CECONY [Member]
Accumulated Other Comprehensive Income/(Loss) [Member]
Accumulated Other Comprehensive Income/(Loss) [Member]
CECONY [Member]
Repurchased Con Edison Stock [Member]
CECONY [Member]
BALANCE at Dec. 31, 2011 $ 11,436 $ 10,218 $ 32 $ 589 $ 4,991 $ 4,234 $ 7,568 $ 6,429 $ (1,033) $ (64) $ (64) $ (58) $ (8) $ (962)
BALANCE (In Shares) at Dec. 31, 2011     292,888,521 235,488,094         23,194,075          
Net income for common stock 277           277              
NET INCOME   276           276            
Common stock dividend (177) (171)         (177) (171)            
Issuance of common shares for stock plans, net of repurchases (2)               (2)          
Cumulative preferred dividends   (3)           (3)            
Issuance of common shares for stock plans, net of repurchases (In Shares)     (7,225)           7,225          
Preferred stock redemption 4 4               4 4      
Other comprehensive income 7                     7     
BALANCE at Mar. 31, 2012 11,545 10,324 32 589 4,991 4,234 7,668 6,531 (1,035) (60) (60) (51) (8) (962)
BALANCE (In Shares) at Mar. 31, 2012     292,881,296 235,488,094         23,201,300          
BALANCE at Dec. 31, 2011 11,436 10,218   589 4,991 4,234               (962)
BALANCE (In Shares) at Dec. 31, 2011       235,488,094                    
Net income for common stock 491 436                        
NET INCOME 494 439                        
Cumulative preferred dividends (3) (3)                        
BALANCE at Jun. 30, 2012 11,579 10,314   589 4,991 4,234         (60)     (962)
BALANCE (In Shares) at Jun. 30, 2012       235,488,094                    
BALANCE at Mar. 31, 2012 11,545 10,324 32 589 4,991 4,234 7,668 6,531 (1,035) (60)   (51) (8) (962)
BALANCE (In Shares) at Mar. 31, 2012     292,881,296 235,488,094         23,201,300          
Net income for common stock 214 163         214              
NET INCOME 214 163           163            
Common stock dividend (178) (171)         (178) (171)            
Issuance of common shares for stock plans, net of repurchases (1)                 (1)        
Issuance of common shares for stock plans, net of repurchases (In Shares)     1,700           (1,700)          
Other comprehensive income (1) (2)                   (1) (2)  
BALANCE at Jun. 30, 2012 11,579 10,314 32 589 4,991 4,234 7,704 6,523 (1,035) (61) (60) (52) (10) (962)
BALANCE (In Shares) at Jun. 30, 2012     292,882,996 235,488,094         23,199,600          
BALANCE at Dec. 31, 2012 11,869 10,552 32 589 4,991 4,234 7,997 6,761 (1,037) (61) (61) (53) (9) (962)
BALANCE (In Shares) at Dec. 31, 2012     292,871,896 235,488,094         23,210,700          
Net income for common stock 192           192              
NET INCOME   277           277            
Common stock dividend (180) (182)         (180) (182)            
Issuance of common shares for stock plans, net of repurchases 5       (2)       7          
Issuance of common shares for stock plans, net of repurchases (In Shares)     95,468           (95,468)          
Other comprehensive income 3                     3     
BALANCE at Mar. 31, 2013 11,889 10,647 32 589 4,989 4,234 8,009 6,856 (1,030) (61) (61) (50) (9) (962)
BALANCE (In Shares) at Mar. 31, 2013     292,967,364 235,488,094         23,115,232          
BALANCE at Dec. 31, 2012 11,869 10,552   589   4,234       (61) (61)     (962)
BALANCE (In Shares) at Dec. 31, 2012       235,488,094                    
Net income for common stock 364 430                        
NET INCOME 364 430                        
BALANCE at Jun. 30, 2013 11,883 10,618   589   4,234       (61) (61)     (962)
BALANCE (In Shares) at Jun. 30, 2013       235,488,094                    
BALANCE at Mar. 31, 2013 11,889 10,647 32 589 4,989 4,234 8,009 6,856 (1,030) (61) (61) (50) (9) (962)
BALANCE (In Shares) at Mar. 31, 2013     292,967,364 235,488,094         23,115,232          
Net income for common stock 172 153         172              
NET INCOME 172 153           153            
Common stock dividend (180) (182)         (180) (182)            
Issuance of common shares for stock plans, net of repurchases         1       (1)          
Issuance of common shares for stock plans, net of repurchases (In Shares)     (4,078)           4,078          
Other comprehensive income 2                     2     
BALANCE at Jun. 30, 2013 $ 11,883 $ 10,618 $ 32 $ 589 $ 4,990 $ 4,234 $ 8,001 $ 6,827 $ (1,031) $ (61) $ (61) $ (48) $ (9) $ (962)
BALANCE (In Shares) at Jun. 30, 2013     292,963,286 235,488,094         23,119,310