Consolidated Statement of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
NET INCOME	$ 436	$ 464	$ 1,010	$ 828
OTHER COMPREHENSIVE INCOME, NET OF TAXES
Pension and other postretirement benefit plan liability adjustments, net of taxes	1	2	6	7
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAXES	1	2	6	7
COMPREHENSIVE INCOME FOR COMMON STOCK	437	466	1,016	835
CECONY [Member]
NET INCOME	399	401	905	831
OTHER COMPREHENSIVE INCOME, NET OF TAXES
Pension and other postretirement benefit plan liability adjustments, net of taxes			1
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAXES	0	0	1	0
COMPREHENSIVE INCOME	$ 399	$ 401	$ 906	$ 831