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79
The following is a summary of the changes in plan assets and benefit obligations recognized in Regulatory Assets and Other Comprehensive Income
(OCI) as well as amounts in Regulatory Assets and OCI reclassified as net periodic benefit expense during the years presented:
Amounts Reclassified To/From
Regulatory Assets OCI
For the Years Ended December 31,
 2014 2013 2014 2013
Actuarial (Gains)/Losses Arising During the Year
$
797.3
$
(635.2)
$
55.9
$
(28.9)
Actuarial Losses Reclassified as Net Periodic Benefit Expense (122.8) (201.2) (5.6) (9.4)
Prior Service Cost Reclassified as Net Periodic Benefit Expense (4.2) (3.8) (0.2) (0.2)
The following is a summary of the remaining Regulatory Assets and Accumulated Other Comprehensive Loss amounts that have not been recognized
as components of net periodic benefit expense as of December 31, 2014 and 2013, and the amounts that are expected to be recognized as components
in 2015:
Regulatory Assets as of Expected AOCI as of Expected
December 31, 2015 December 31, 2015
 2014 2013 Expense 2014 2013 Expense
Actuarial Loss
$
1,811.9
$
1,137.4 $149.1 $93.5 $43.2 $6.4
Prior Service Cost 13.2 17.4 3.5 0.8 1.0 0.2
As of December 31, 2013, the funded status of the NSTAR PBOP Plan was recorded on the NSTAR Electric & Gas balance sheet. As
of December 31, 2013, all NSTAR employees were employed by NSTAR Electric & Gas. On January 1, 2014, concurrent with the service company
merger, the PBOP assets and liabilities were attributed by participant and transferred to the applicable company's balance sheets. This change had no
impact on the income statement or net assets of NSTAR Electric or NU. For the year ended December 31, 2014, the NUSCO and NSTAR PBOP
Plans are accounted for under the multiple-employer approach, with each company's balance sheet reflecting its share of the funded status of the
plans.
NU annually funds postretirement costs through tax deductible contributions to external trusts.
The following tables provide information on PBOP Plan benefit obligations, fair values of plan assets, and funded status:
PBOP
NU As of December 31,
 2014 2013
Change in Benefit Obligation
Benefit Obligation as of Beginning of Year $(1,038.0) $
(1,233.3)
Service Cost (12.5)
(16.9)
Interest Cost (49.5)
(47.2)
Actuarial Gain/(Loss) (95.5) 200.9
Benefits Paid 47.6 58.5
Benefit Obligation as of End of Year $(1,147.9) $
(1,038.0)
Change in PBOP Plan Assets
Fair Value of Plan Assets as of Beginning of Year $826.5 $709.1
Actual Return on Plan Assets 43.7 118.3
Employer Contributions 40.0 57.6
Benefits Paid (47.6)
(58.5)
Fair Value of Plan Assets as of End of Year $862.6 $826.5
Funded Status as of December 31
s
t
$(285.3) $
(211.5)
PBOP
As of December 31,
2014 2013
NSTAR
 CL&P Electric PSNH WMECO CL&P PSNH WMECO
Change in Benefit Obligation
Benefit Obligation as of Beginning of Year $
(180.4)
$ -
$
(93.5)
$
(38.7)
$(196.8) $
(100.2)
$
(42.5)
Decrease/(Increase) due to transfer of employees 3.7
(395.5)
4.3 1.0 - -
-
Service Cost
(2.2)
(3.1)
(1.3)
(0.4)
(3.4)
(2.3)
(0.7)
Interest Cost
(8.1)
(19.4)
(4.3)
(1.7)
(7.9)
(4.0)
(1.7)
Actuarial Gain/(Loss) 3.5
(68.6)
(1.1)
1.3 13.3 7.2 3.3
Benefits Paid 9.6 17.9 4.1 1.9 14.4 5.8 2.9
Benefit Obligation as of End of Year $
(173.9)
$
(468.7)
$
(91.8)
$
(36.6)
$(180.4) $
(93.5)
$
(38.7)
Change in PBOP Plan Assets
Fair Value of Plan Assets as of Beginning of Year $151.3 $ -
$81.8 $35.3 $132.2 $69.5 $31.0
(Decrease)/Increase due to transfer of employees
(3.2)
316.7
(3.1)
(1.0)
- -
-
Actual Return on Plan Assets 6.3 18.4 3.8 1.6 24.8 13.4 6.0
Employer Contributions 4.2 19.3 2.5 0.4 8.7 4.7 1.2
Benefits Paid
(9.6)
(17.9)
(4.1)
(1.9)
(14.4)
(5.8)
(2.9)
Fair Value of Plan Assets as of End of Year $149.0 $336.5 $80.9 $34.4 $151.3 $81.8 $35.3
Funded Status as of December 31
s
t
$
(24.9)
$
(132.2)
$
(10.9)
$
(2.2)
$(29.1) $
(11.7)
$
(3.4)
During 2014, the Society of Actuaries released a series of updated mortality tables resulting from recent studies that measured mortality rates for
various groups of individuals. The updated mortality tables released in 2014 increased life expectancy of plan participants by 3 to 5 years and have
the effect of increasing the estimate of benefits to be provided to plan participants. The impact of this adoption on NU's funded status liability for the