Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
NET INCOME	$ 361	$ 192
OTHER COMPREHENSIVE INCOME, NET OF TAXES
Pension plan liability adjustments, net	4	3
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAXES	4	3
COMPREHENSIVE INCOME FOR COMMON STOCK	365	195
CECONY [Member]
NET INCOME	334	277
OTHER COMPREHENSIVE INCOME, NET OF TAXES
Pension plan liability adjustments, net	1
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAXES	1
COMPREHENSIVE INCOME	$ 335	$ 277