Consolidated Statement Of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net Income	$ 214	$ 168	$ 494	$ 483
OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES
Pension plan liability adjustment	(1)	2	6	5
TOTAL OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES	(1)	2	6	5
COMPREHENSIVE INCOME	213	170	500	488
Preferred stock dividend requirements of subsidiary		(3)	(3)	(6)
COMPREHENSIVE INCOME FOR COMMON STOCK	213	167	497	482
CECONY
Net Income	163	160	439	432
OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES
Pension plan liability adjustment	(2)		(2)
TOTAL OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES	(2)		(2)
COMPREHENSIVE INCOME	161	160	437	432
Preferred stock dividend requirements of subsidiary		$ 3