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Other Postretirement Benefits
6 Months Ended
Jun. 30, 2018
Retirement Benefits [Abstract]  
Other Postretirement Benefits
Other Postretirement Benefits
Total Periodic Benefit Cost
The components of the Companies’ total periodic other postretirement benefit costs for the three and six months ended June 30, 2018 and 2017 were as follows:
 
 
For the Three Months Ended June 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
10
Expected return on plan assets
(18)
(17)
(16)
(15)
Recognition of net actuarial loss/(gain)
2
1
1
(1)
Recognition of prior service cost/(credit)
(2)
(4)
(1)
(3)
TOTAL PERIODIC OTHER POSTRETIREMENT BENEFIT COST/(CREDIT)
$(2)
$(4)
$(4)
$(6)
Cost capitalized
(2)
2
(1)
3
Reconciliation to rate level
2
(1)
2
(1)
Total expense/(credit) recognized
$(2)
$(3)
$(3)
$(4)


 
For the Six Months Ended June 30,
  
Con Edison
CECONY
(Millions of Dollars)
2018
2017
2018
2017
Service cost
$10
$10
$7
$7
Interest cost on accumulated other postretirement benefit obligation
21
23
17
19
Expected return on plan assets
(37)
(35)
(31)
(30)
Recognition of net actuarial loss/(gain)
4
1
1
(2)
Recognition of prior service cost/(credit)
(3)
(8)
(1)
(6)
TOTAL PERIODIC OTHER POSTRETIREMENT BENEFIT COST/(CREDIT)
$(5)
$(9)
$(7)
$(12)
Cost capitalized
(4)
4
(3)
5
Reconciliation to rate level
5
(2)
5
(1)
Total expense/(credit) recognized
$(4)
$(7)
$(5)
$(8)

For information about the adoption of ASU 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” see Note E.

Contributions
Based on estimates as of June 30, 2018, Con Edison and CECONY expect to make a contribution of $6 million (substantially all of which is to be contributed by CECONY) to the other postretirement benefit plans in 2018. The Companies' policy is to fund the total periodic benefit cost of the plans to the extent tax deductible.