Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
NET INCOME	$ 1,062	$ 1,141	$ 1,062
OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES
Pension plan liability adjustments, net	28	5	(18)
TOTAL OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES	28	5	(18)
COMPREHENSIVE INCOME	1,090	1,146	1,044
Cumulative preferred dividends		(3)	(11)
COMPREHENSIVE INCOME FOR COMMON STOCK	1,090	1,143	1,033
CECONY [Member]
NET INCOME	1,020	1,017	989
OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES
Pension plan liability adjustments, net	3	(1)	(2)
TOTAL OTHER COMPREHENSIVE INCOME/(LOSS), NET OF TAXES	3	(1)	(2)
COMPREHENSIVE INCOME	1,023	1,016	987
Cumulative preferred dividends		$ (3)	$ (11)