Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
NET INCOME	$ 1,525	$ 1,245	$ 1,193
OTHER COMPREHENSIVE INCOME, NET OF TAXES
Pension and other postretirement benefit plan liability adjustments, net of taxes	1	7	11
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAXES	1	7	11
COMPREHENSIVE INCOME	1,526	1,252	1,204
CECONY
NET INCOME	1,104	1,056	1,084
OTHER COMPREHENSIVE INCOME, NET OF TAXES
Pension and other postretirement benefit plan liability adjustments, net of taxes	1	2	2
TOTAL OTHER COMPREHENSIVE INCOME, NET OF TAXES	1	2	2
COMPREHENSIVE INCOME	$ 1,105	$ 1,058	$ 1,086