Pension Benefits (Tables)

9 Months Ended

Sep. 30, 2017

Retirement Benefits [Abstract]

Total Periodic Benefit Costs

The components of the Companies’ total periodic benefit costs for the three and nine months ended September 30, 2017 and 2016 were as follows:

	For the Three Months Ended September 30,
	Con Edison		CECONY
(Millions of Dollars)	2017	2016	2017	2016
Service cost – including administrative expenses	$66	$69	$61	$65
Interest cost on projected benefit obligation	148	149	139	140
Expected return on plan assets	(243)	(237)	(229)	(225)
Recognition of net actuarial loss	149	149	141	141
Recognition of prior service costs	(4)	1	(5)	—
TOTAL PERIODIC BENEFIT COST	$116	$131	$107	$121
Cost capitalized	(40)	(51)	(37)	(49)
Reconciliation to rate level	(14)	10	(16)	13
Cost charged to operating expenses	$62	$90	$54	$85

	For the Nine Months Ended September 30,
	Con Edison		CECONY
(Millions of Dollars)	2017	2016	2017	2016
Service cost – including administrative expenses	$197	$207	$184	$194
Interest cost on projected benefit obligation	444	447	416	419
Expected return on plan assets	(726)	(711)	(689)	(674)
Recognition of net actuarial loss	446	447	423	424
Recognition of prior service costs	(13)	3	(14)	1
TOTAL PERIODIC BENEFIT COST	$348	$393	$320	$364
Cost capitalized	(134)	(157)	(125)	(148)
Reconciliation to rate level	(28)	35	(32)	39
Cost charged to operating expenses	$186	$271	$163	$255

The components of the Companies’ total periodic other postretirement benefit costs for the three and nine months ended September 30, 2017 and 2016 were as follows:

	For the Three Months Ended September 30,
	Con Edison		CECONY
(Millions of Dollars)	2017	2016	2017	2016
Service cost	$5	$4	$3	$3
Interest cost on accumulated other postretirement benefit obligation	11	12	9	10
Expected return on plan assets	(17)	(19)	(15)	(17)
Recognition of net actuarial loss	1	1	—	1
Recognition of prior service cost	(5)	(5)	(3)	(3)
TOTAL PERIODIC OTHER POSTRETIREMENT BENEFIT COST	$(5)	$(7)	$(6)	$(6)
Cost capitalized	2	2	2	2
Reconciliation to rate level	(1)	7	—	6
Cost charged to operating expenses	$(4)	$2	$(4)	$2

	For the Nine Months Ended September 30,
	Con Edison		CECONY
(Millions of Dollars)	2017	2016	2017	2016
Service cost	$15	$13	$10	$10
Interest cost on accumulated other postretirement benefit obligation	34	36	28	30
Expected return on plan assets	(52)	(58)	(45)	(50)
Recognition of net actuarial loss/(gain)	2	4	(2)	2
Recognition of prior service cost	(13)	(15)	(9)	(11)
TOTAL PERIODIC OTHER POSTRETIREMENT BENEFIT COST	$(14)	$(20)	$(18)	$(19)
Cost capitalized	6	5	7	5
Reconciliation to rate level	(3)	20	(1)	19
Cost charged to operating expenses	$(11)	$5	$(12)	$5