Pension Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Retirement Benefits [Abstract]

Total Periodic Benefit Costs

The components of the Companies’ total periodic benefit cost for the three and nine months ended September 30, 2018 and 2017 were as follows:

	For the Three Months Ended September 30,
	Con Edison		CECONY
(Millions of Dollars)	2018	2017	2018	2017
Service cost – including administrative expenses	$72	$66	$68	$61
Interest cost on projected benefit obligation	140	148	131	139
Expected return on plan assets	(258)	(243)	(245)	(229)
Recognition of net actuarial loss	172	149	163	141
Recognition of prior service cost/(credit)	(4)	(4)	(5)	(5)
TOTAL PERIODIC BENEFIT COST	$122	$116	$112	$107
Cost capitalized	(32)	(40)	(30)	(37)
Reconciliation to rate level	(22)	(14)	(24)	(16)
Total expense recognized	$68	$62	$58	$54

	For the Nine Months Ended September 30,
	Con Edison		CECONY
(Millions of Dollars)	2018	2017	2018	2017
Service cost – including administrative expenses	$218	$197	$204	$184
Interest cost on projected benefit obligation	420	444	394	416
Expected return on plan assets	(775)	(726)	(734)	(689)
Recognition of net actuarial loss	516	446	488	423
Recognition of prior service cost/(credit)	(13)	(13)	(15)	(14)
TOTAL PERIODIC BENEFIT COST	$366	$348	$337	$320
Cost capitalized	(94)	(134)	(89)	(125)
Reconciliation to rate level	(68)	(28)	(74)	(32)
Total expense recognized	$204	$186	$174	$163

The components of the Companies’ total periodic other postretirement benefit cost/(credit) for the three and nine months ended September 30, 2018 and 2017 were as follows:

	For the Three Months Ended September 30,
	Con Edison		CECONY
(Millions of Dollars)	2018	2017	2018	2017
Service cost	$5	$5	$3	$3
Interest cost on accumulated other postretirement benefit obligation	11	11	9	9
Expected return on plan assets	(18)	(17)	(16)	(15)
Recognition of net actuarial loss/(gain)	2	1	1	—
Recognition of prior service cost/(credit)	(2)	(5)	(1)	(3)
TOTAL PERIODIC OTHER POSTRETIREMENT BENEFIT COST/(CREDIT)	$(2)	$(5)	$(4)	$(6)
Cost capitalized	(2)	2	(1)	2
Reconciliation to rate level	2	(1)	2	—
Total expense/(credit) recognized	$(2)	$(4)	$(3)	$(4)

	For the Nine Months Ended September 30,
	Con Edison		CECONY
(Millions of Dollars)	2018	2017	2018	2017
Service cost	$15	$15	$10	$10
Interest cost on accumulated other postretirement benefit obligation	32	34	26	28
Expected return on plan assets	(55)	(52)	(47)	(45)
Recognition of net actuarial loss/(gain)	6	2	2	(2)
Recognition of prior service cost/(credit)	(5)	(13)	(2)	(9)
TOTAL PERIODIC OTHER POSTRETIREMENT BENEFIT COST/(CREDIT)	$(7)	$(14)	$(11)	$(18)
Cost capitalized	(6)	6	(4)	7
Reconciliation to rate level	6	(3)	7	(1)
Total expense/(credit) recognized	$(7)	$(11)	$(8)	$(12)