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Pay vs Performance Disclosure
 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Pay vs Performance Disclosure          
Pay vs Performance Disclosure, Table
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
Value of Initial
Fixed $100
Investment Based on
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​
Fiscal
Year
​ ​
SCT Total
PEO
#1(1)
​ ​
CAP PEO
#1(1)
​ ​
SCT Total
PEO
#2(1)
​ ​
CAP
PEO
#2(1)
​ ​
Average SCT
Non-PEO
NEOs(2)
​ ​
CAP
Non-PEO
NEOs(2)
​ ​
Company
TSR(3)
​ ​
Peer
Group
TSR(3)
​ ​
Net Income
(GAAP)
​ ​
Company
Selected
Measure (EPS
Non-GAAP)(4)
​
​
a
​ ​
b
​ ​
c
​ ​
d
​ ​
e
​ ​
f
​ ​
g
​ ​
h
​ ​
i
​ ​
j
​ ​
k
​
​
1 (2024)
​ ​ ​ ​ 13,578,154 ​ ​ ​ ​ ​ 9,503,340 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 3,496,586 ​ ​ ​ ​ ​ 2,647,958 ​ ​ ​ ​ ​ 80 ​ ​ ​ ​ ​ 127 ​ ​ ​ ​ ​ 811.7 ​ ​ ​ ​ ​ 4.57 ​ ​
​
2 (2023)
​ ​ ​ ​ 18,885,577 ​ ​ ​ ​ ​ 7,429,247 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2,936,041 ​ ​ ​ ​ ​ 1,135,182 ​ ​ ​ ​ ​ 82 ​ ​ ​ ​ ​ 107 ​ ​ ​ ​ ​ -442.2 ​ ​ ​ ​ ​ 4.34 ​ ​
​
3 (2022)
​ ​ ​ ​ 12,959,134 ​ ​ ​ ​ ​ 10,858,066 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 3,410,910 ​ ​ ​ ​ ​ 2,951,647 ​ ​ ​ ​ ​ 107 ​ ​ ​ ​ ​ 117 ​ ​ ​ ​ ​ 1,404.9 ​ ​ ​ ​ ​ 4.09 ​ ​
​
4 (2021)
​ ​ ​ ​ 6,467,078 ​ ​ ​ ​ ​ 5,120,192 ​ ​ ​ ​ ​ 10,220,941 ​ ​ ​ ​ ​ 10,910,465 ​ ​ ​ ​ ​ 4,157,260 ​ ​ ​ ​ ​ 3,471,045 ​ ​ ​ ​ ​ 113 ​ ​ ​ ​ ​ 116 ​ ​ ​ ​ ​ 1,220.5 ​ ​ ​ ​ ​ 3.86 ​ ​
​
5 (2020)
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 14,575,276 ​ ​ ​ ​ ​ 14,062,876 ​ ​ ​ ​ ​ 5,002,344 ​ ​ ​ ​ ​ 3,960,432 ​ ​ ​ ​ ​ 105 ​ ​ ​ ​ ​ 99 ​ ​ ​ ​ ​ 1,205.2 ​ ​ ​ ​ ​ 3.64 ​ ​
(1)
The PEOs for each year are as follows:
​
a.
2024, 2023, 2022 and 2021 — Joseph R. Nolan, Jr.
​
b.
2020 and 2021 — James J. Judge. Mr. Nolan became the Company’s Chief Executive Officer on May 5, 2021
​
(2)
The Non-PEO NEOs for each year are as follows:
​
a.
2024 — John Moreira, Paul Chodak, III, Susan Sgroi and Gregory B. Butler
2023 — John M. Moreira, Gregory B. Butler, Christine M. Carmody, James W. Hunt, III and Werner J. Schweiger
​
c.
2022 — John M. Moreira, Gregory B. Butler, Christine M. Carmody, Werner J. Schweiger, James J. Judge and Philip J. Lembo
​
d.
2021 — Philip J. Lembo, Werner J. Schweiger, Gregory B. Butler and Christine M. Carmody
​
e.
2020 — Philip J. Lembo, Werner J. Schweiger, Gregory B. Butler and Joseph R. Nolan, Jr.
​
(3)
The values disclosed in this TSR column represent the measurement period value of an investment of $100 in our units as of December 31, 2020, and then valued again on each of December 31, 2021, December 31, 2022, December 31, 2023 and December 31, 2024 as compared to the EEI Index, as disclosed in our Annual Report on Form 10-K for fiscal year ended 2024 pursuant to Item 201(e) of Regulation S-K
​
(4)
Set forth in Footnote 1 on page 39 and Exhibit A to the CD&A is a full description of how non-GAAP EPS was determined. The Company believes non-GAAP EPS is a very important measure to investors and which is indicative of Company performance; accordingly, it represents a significant factor in determining both annual and long term executive compensation, though as noted the Compensation Committee determined that due to the disappointing performance in our 2024 stock price, the Committee reduced payout for the EPS-based goal in our 2024 annual incentive plan to 75 percent from an indicative payout in the range of 125 to 200 percent. To calculate CAP for our PEOs and Non-PEO NEOs in the table above, the following amounts were deducted and added to the values as reported in the SCT:
​
Fiscal
Year
​ ​
SCT Total
PEO #1
​ ​
Pension
Deducted
from SCT
​ ​
Pension
Service
Value
Added to
SCT
​ ​
Stock
Awards
Deducted
from SCT
​ ​
Fair Value
of Equity
Awards
Granted
during the
Year and
Remained
Unvested at
Year-End
​ ​
Change in
Fair Value
of Unvested
Equity
Awards that
Vested
During the
Year
​ ​
Change in
Fair Value
of Unvested
Equity
Grants
​ ​
CAP PEO #1
​
​
a
​ ​
b
​ ​
c
​ ​
d
​ ​
e
​ ​
f
​ ​
g
​ ​
h
​ ​
i
​
​
1 (2024)
​ ​ ​ ​ 13,578,154 ​ ​ ​ ​ ​ -2,188,733 ​ ​ ​ ​ ​ 1,444,389 ​ ​ ​ ​ ​ -7,510,128 ​ ​ ​ ​ ​ 7,266,337 ​ ​ ​ ​ ​ -308,543 ​ ​ ​ ​ ​ -2,778,136 ​ ​ ​ ​ ​ 9,503,340 ​ ​
​
2 (2023)
​ ​ ​ ​ 18,885,577 ​ ​ ​ ​ ​ -7,832,472 ​ ​ ​ ​ ​ 689,828 ​ ​ ​ ​ ​ -8,018,396 ​ ​ ​ ​ ​ 6,023,948 ​ ​ ​ ​ ​ -182,331 ​ ​ ​ ​ ​ -2,136,906 ​ ​ ​ ​ ​ 7,429,247 ​ ​
​
3 (2022)
​ ​ ​ ​ 12,959,134 ​ ​ ​ ​ ​ -2,143,443 ​ ​ ​ ​ ​ 429,463 ​ ​ ​ ​ ​ -6,825,923 ​ ​ ​ ​ ​ 6,749,195 ​ ​ ​ ​ ​ -235,802 ​ ​ ​ ​ ​ -74,557 ​ ​ ​ ​ ​ 10,858,066 ​ ​
​
4 (2021)
​ ​ ​ ​ 6,467,078 ​ ​ ​ ​ ​ -1,705,782 ​ ​ ​ ​ ​ 336,850 ​ ​ ​ ​ ​ -1,441,650 ​ ​ ​ ​ ​ 1,546,319 ​ ​ ​ ​ ​ -201,335 ​ ​ ​ ​ ​ 118,712 ​ ​ ​ ​ ​ 5,120,192 ​ ​
​
Fiscal
Year
​ ​
SCT Total
PEO #2
​ ​
Pension
Deducted
from SCT
​ ​
Pension
Service
Value
Added to SCT
​ ​
Stock
Awards
Deducted
from SCT
​ ​
Fair Value
of Equity
Awards
Granted
during the
Year and
Remained
Unvested at
Year-End
​ ​
Change in
Fair Value
of Unvested
Equity
Awards that
Vested
During the
Year
​ ​
Change in
Fair Value
of Unvested
Equity
Grants
​ ​
CAP PEO #2
​
​
a
​ ​
b
​ ​
c
​ ​
d
​ ​
e
​ ​
f
​ ​
g
​ ​
h
​ ​
i
​
​
(2021)
​ ​ ​ ​ 10,220,941 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 845,242 ​ ​ ​ ​ ​ -6,786,337 ​ ​ ​ ​ ​ 7,279,051 ​ ​ ​ ​ ​ -1,266,246 ​ ​ ​ ​ ​ 617,814 ​ ​ ​ ​ ​ 10,910,465 ​ ​
​
(2020)
​ ​ ​ ​ 14,575,276 ​ ​ ​ ​ ​ -3,742,215 ​ ​ ​ ​ ​ 111,326 ​ ​ ​ ​ ​ -6,682,612 ​ ​ ​ ​ ​ 6,707,152 ​ ​ ​ ​ ​ 2,047,648 ​ ​ ​ ​ ​ 1,046,301 ​ ​ ​ ​ ​ 14,062,876 ​ ​
​
Fiscal
Year
​ ​
Average SCT
Non-PEO
NEOs
​ ​
Pension
Deducted
from SCT
​ ​
Pension
Service
Value
Added to
SCT
​ ​
Stock
Awards
Deducted
from SCT
​ ​
Fair Value
of Equity
Awards
Granted
during the
Year and
Remained
Unvested at
Year-End
​ ​
Change in
Fair Value
of Unvested
Equity
Awards that
Vested
During the
Year
​ ​
Change in
Fair Value
of Unvested
Equity
Grants
​ ​
Average CAP
Non-PEO NEOs
​
​
a
​ ​
b
​ ​
c
​ ​
d
​ ​
e
​ ​
f
​ ​
g
​ ​
h
​ ​
i
​
​
1 (2024)
​ ​ ​ ​ 3,496,586 ​ ​ ​ ​ ​ -213,868 ​ ​ ​ ​ ​ 15,887 ​ ​ ​ ​ ​ -1,687,365 ​ ​ ​ ​ ​ 1,632,591 ​ ​ ​ ​ ​ -86,350 ​ ​ ​ ​ ​ -509,706 ​ ​ ​ ​ ​ 2,647,958 ​ ​
​
3 (2023)
​ ​ ​ ​ 2,936,041 ​ ​ ​ ​ ​ -478,864 ​ ​ ​ ​ ​ 84,416 ​ ​ ​ ​ ​ -1,451,776 ​ ​ ​ ​ ​ 827,273 ​ ​ ​ ​ ​ -102,269 ​ ​ ​ ​ ​ -679,639 ​ ​ ​ ​ ​ 1,135,182 ​ ​
​
4 (2022)
​ ​ ​ ​ 3,410,910 ​ ​ ​ ​ ​ -69,941 ​ ​ ​ ​ ​ 162,780 ​ ​ ​ ​ ​ -2,054,232 ​ ​ ​ ​ ​ 2,031,140 ​ ​ ​ ​ ​ -419,104 ​ ​ ​ ​ ​ -109,907 ​ ​ ​ ​ ​ 2,951,647 ​ ​
​
5 (2021)
​ ​ ​ ​ 4,157,260 ​ ​ ​ ​ ​ -1,205,814 ​ ​ ​ ​ ​ 530,849 ​ ​ ​ ​ ​ -1,408,117 ​ ​ ​ ​ ​ 1,510,350 ​ ​ ​ ​ ​ -238,540 ​ ​ ​ ​ ​ 125,057 ​ ​ ​ ​ ​ 3,471,045 ​ ​
​
6 (2020)
​ ​ ​ ​ 5,002,344 ​ ​ ​ ​ ​ -1,929,875 ​ ​ ​ ​ ​ 257,161 ​ ​ ​ ​ ​ -1,494,123 ​ ​ ​ ​ ​ 1,499,609 ​ ​ ​ ​ ​ 422,302 ​ ​ ​ ​ ​ 203,013 ​ ​ ​ ​ ​ 3,960,432 ​ ​
​
(a)
The total pension benefit adjustments for each applicable year include the aggregate of two components: (i) the actuarially determined service cost for services rendered by the PEO and non-PEO NEOs during the applicable year (the “service cost”); and (ii) the entire cost of benefits granted in a plan amendment (or initiation) during the applicable year that are attributed by the benefit formula to services rendered in periods prior to the plan amendment or initiation (the “prior service cost”), in each case, calculated in accordance with U.S. GAAP
​
​
Fiscal Year
​ ​
Service
Cost
​ ​
Prior
Service
Cost
​ ​
Total
Pension
Benefit
Adjustments
​
​
a
​ ​
b
​ ​
c
​ ​
d
​
​
PEO#1 (2024)
​ ​ ​ ​ 1,444,389 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 1,444,389 ​ ​
​
PEO#1 (2023)
​ ​ ​ ​ 689,828 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 689,828 ​ ​
​
PEO#1 (2022)
​ ​ ​ ​ 429,463 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 429,463 ​ ​
​
PEO#1 (2021)
​ ​ ​ ​ 336,850 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 336,850 ​ ​
​
PEO#2 (2021)
​ ​ ​ ​ 845,242 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 845,242 ​ ​
​
PEO#2 (2020)
​ ​ ​ ​ 111,326 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 111,326 ​ ​
​
Average Non-PEO NEO (2024)
​ ​ ​ ​ 15,887 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 15,887 ​ ​
​
Average Non-PEO NEO (2023)
​ ​ ​ ​ 84,416 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 84,416 ​ ​
​
Average Non-PEO NEO (2022)
​ ​ ​ ​ 162,780 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 162,780 ​ ​
​
Average Non-PEO NEO (2021)
​ ​ ​ ​ 530,849 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 530,849 ​ ​
​
Average Non-PEO NEO (2020)
​ ​ ​ ​ 257,161 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 257,161 ​ ​
​
(b)
For the periods covered, no individual equity awards were granted and vested in the same year and no dividends or other earnings were paid on outstanding and unvested awards. The valuation assumptions used to calculate the fair values of performance shares reflect the probable outcome of the performance conditions as of the applicable measuring date (or actual performance results approved by the Compensation Committee as of the applicable vesting date). Outstanding RSUs accrue dividend equivalent units in the form of additional common shares that are not distributed unless and until the underlying award vests and becomes payable. The value of dividend equivalent units is reflected in the values set forth above.
       
Company Selected Measure Name EPS        
Named Executive Officers, Footnote
(1)
The PEOs for each year are as follows:
​
a.
2024, 2023, 2022 and 2021 — Joseph R. Nolan, Jr.
​
b.
2020 and 2021 — James J. Judge. Mr. Nolan became the Company’s Chief Executive Officer on May 5, 2021
​
(2)
The Non-PEO NEOs for each year are as follows:
​
a.
2024 — John Moreira, Paul Chodak, III, Susan Sgroi and Gregory B. Butler
2023 — John M. Moreira, Gregory B. Butler, Christine M. Carmody, James W. Hunt, III and Werner J. Schweiger
​
c.
2022 — John M. Moreira, Gregory B. Butler, Christine M. Carmody, Werner J. Schweiger, James J. Judge and Philip J. Lembo
​
d.
2021 — Philip J. Lembo, Werner J. Schweiger, Gregory B. Butler and Christine M. Carmody
​
e.
2020 — Philip J. Lembo, Werner J. Schweiger, Gregory B. Butler and Joseph R. Nolan 		       
Peer Group Issuers, Footnote
(3)
The values disclosed in this TSR column represent the measurement period value of an investment of $100 in our units as of December 31, 2020, and then valued again on each of December 31, 2021, December 31, 2022, December 31, 2023 and December 31, 2024 as compared to the EEI Index, as disclosed in our Annual Report on Form 10-K for fiscal year ended 2024 pursuant to Item 201(e) of Regulation S-K
       
Adjustment To PEO Compensation, Footnote To calculate CAP for our PEOs and Non-PEO NEOs in the table above, the following amounts were deducted and added to the values as reported in the SCT:
​
Fiscal
Year
​ ​
SCT Total
PEO #1
​ ​
Pension
Deducted
from SCT
​ ​
Pension
Service
Value
Added to
SCT
​ ​
Stock
Awards
Deducted
from SCT
​ ​
Fair Value
of Equity
Awards
Granted
during the
Year and
Remained
Unvested at
Year-End
​ ​
Change in
Fair Value
of Unvested
Equity
Awards that
Vested
During the
Year
​ ​
Change in
Fair Value
of Unvested
Equity
Grants
​ ​
CAP PEO #1
​
​
a
​ ​
b
​ ​
c
​ ​
d
​ ​
e
​ ​
f
​ ​
g
​ ​
h
​ ​
i
​
​
1 (2024)
​ ​ ​ ​ 13,578,154 ​ ​ ​ ​ ​ -2,188,733 ​ ​ ​ ​ ​ 1,444,389 ​ ​ ​ ​ ​ -7,510,128 ​ ​ ​ ​ ​ 7,266,337 ​ ​ ​ ​ ​ -308,543 ​ ​ ​ ​ ​ -2,778,136 ​ ​ ​ ​ ​ 9,503,340 ​ ​
​
2 (2023)
​ ​ ​ ​ 18,885,577 ​ ​ ​ ​ ​ -7,832,472 ​ ​ ​ ​ ​ 689,828 ​ ​ ​ ​ ​ -8,018,396 ​ ​ ​ ​ ​ 6,023,948 ​ ​ ​ ​ ​ -182,331 ​ ​ ​ ​ ​ -2,136,906 ​ ​ ​ ​ ​ 7,429,247 ​ ​
​
3 (2022)
​ ​ ​ ​ 12,959,134 ​ ​ ​ ​ ​ -2,143,443 ​ ​ ​ ​ ​ 429,463 ​ ​ ​ ​ ​ -6,825,923 ​ ​ ​ ​ ​ 6,749,195 ​ ​ ​ ​ ​ -235,802 ​ ​ ​ ​ ​ -74,557 ​ ​ ​ ​ ​ 10,858,066 ​ ​
​
4 (2021)
​ ​ ​ ​ 6,467,078 ​ ​ ​ ​ ​ -1,705,782 ​ ​ ​ ​ ​ 336,850 ​ ​ ​ ​ ​ -1,441,650 ​ ​ ​ ​ ​ 1,546,319 ​ ​ ​ ​ ​ -201,335 ​ ​ ​ ​ ​ 118,712 ​ ​ ​ ​ ​ 5,120,192 ​ ​
​
Fiscal
Year
​ ​
SCT Total
PEO #2
​ ​
Pension
Deducted
from SCT
​ ​
Pension
Service
Value
Added to SCT
​ ​
Stock
Awards
Deducted
from SCT
​ ​
Fair Value
of Equity
Awards
Granted
during the
Year and
Remained
Unvested at
Year-End
​ ​
Change in
Fair Value
of Unvested
Equity
Awards that
Vested
During the
Year
​ ​
Change in
Fair Value
of Unvested
Equity
Grants
​ ​
CAP PEO #2
​
​
a
​ ​
b
​ ​
c
​ ​
d
​ ​
e
​ ​
f
​ ​
g
​ ​
h
​ ​
i
​
​
(2021)
​ ​ ​ ​ 10,220,941 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 845,242 ​ ​ ​ ​ ​ -6,786,337 ​ ​ ​ ​ ​ 7,279,051 ​ ​ ​ ​ ​ -1,266,246 ​ ​ ​ ​ ​ 617,814 ​ ​ ​ ​ ​ 10,910,465 ​ ​
​
(2020)
​ ​ ​ ​ 14,575,276 ​ ​ ​ ​ ​ -3,742,215 ​ ​ ​ ​ ​ 111,326 ​ ​ ​ ​ ​ -6,682,612 ​ ​ ​ ​ ​ 6,707,152 ​ ​ ​ ​ ​ 2,047,648 ​ ​ ​ ​ ​ 1,046,301 ​ ​ ​ ​ ​ 14,062,876 ​ ​
(a)
The total pension benefit adjustments for each applicable year include the aggregate of two components: (i) the actuarially determined service cost for services rendered by the PEO and non-PEO NEOs during the applicable year (the “service cost”); and (ii) the entire cost of benefits granted in a plan amendment (or initiation) during the applicable year that are attributed by the benefit formula to services rendered in periods prior to the plan amendment or initiation (the “prior service cost”), in each case, calculated in accordance with U.S. GAAP
​
​
Fiscal Year
​ ​
Service
Cost
​ ​
Prior
Service
Cost
​ ​
Total
Pension
Benefit
Adjustments
​
​
a
​ ​
b
​ ​
c
​ ​
d
​
​
PEO#1 (2024)
​ ​ ​ ​ 1,444,389 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 1,444,389 ​ ​
​
PEO#1 (2023)
​ ​ ​ ​ 689,828 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 689,828 ​ ​
​
PEO#1 (2022)
​ ​ ​ ​ 429,463 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 429,463 ​ ​
​
PEO#1 (2021)
​ ​ ​ ​ 336,850 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 336,850 ​ ​
​
PEO#2 (2021)
​ ​ ​ ​ 845,242 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 845,242 ​ ​
​
PEO#2 (2020)
​ ​ ​ ​ 111,326 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 111,326 ​ ​
​
Average Non-PEO NEO (2024)
​ ​ ​ ​ 15,887 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 15,887 ​ ​
​
Average Non-PEO NEO (2023)
​ ​ ​ ​ 84,416 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 84,416 ​ ​
​
Average Non-PEO NEO (2022)
​ ​ ​ ​ 162,780 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 162,780 ​ ​
​
Average Non-PEO NEO (2021)
​ ​ ​ ​ 530,849 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 530,849 ​ ​
​
Average Non-PEO NEO (2020)
​ ​ ​ ​ 257,161 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 257,161 ​ ​
​
(b)
For the periods covered, no individual equity awards were granted and vested in the same year and no dividends or other earnings were paid on outstanding and unvested awards. The valuation assumptions used to calculate the fair values of performance shares reflect the probable outcome of the performance conditions as of the applicable measuring date (or actual performance results approved by the Compensation Committee as of the applicable vesting date). Outstanding RSUs accrue dividend equivalent units in the form of additional common shares that are not distributed unless and until the underlying award vests and becomes payable. The value of dividend equivalent units is reflected in the values set forth above.
       
Non-PEO NEO Average Total Compensation Amount $ 3,496,586 $ 2,936,041 $ 3,410,910 $ 4,157,260 $ 5,002,344
Non-PEO NEO Average Compensation Actually Paid Amount $ 2,647,958 1,135,182 2,951,647 3,471,045 3,960,432
Adjustment to Non-PEO NEO Compensation Footnote To calculate CAP for our PEOs and Non-PEO NEOs in the table above, the following amounts were deducted and added to the values as reported in the SCT:
​
Fiscal
Year
​ ​
Average SCT
Non-PEO
NEOs
​ ​
Pension
Deducted
from SCT
​ ​
Pension
Service
Value
Added to
SCT
​ ​
Stock
Awards
Deducted
from SCT
​ ​
Fair Value
of Equity
Awards
Granted
during the
Year and
Remained
Unvested at
Year-End
​ ​
Change in
Fair Value
of Unvested
Equity
Awards that
Vested
During the
Year
​ ​
Change in
Fair Value
of Unvested
Equity
Grants
​ ​
Average CAP
Non-PEO NEOs
​
​
a
​ ​
b
​ ​
c
​ ​
d
​ ​
e
​ ​
f
​ ​
g
​ ​
h
​ ​
i
​
​
1 (2024)
​ ​ ​ ​ 3,496,586 ​ ​ ​ ​ ​ -213,868 ​ ​ ​ ​ ​ 15,887 ​ ​ ​ ​ ​ -1,687,365 ​ ​ ​ ​ ​ 1,632,591 ​ ​ ​ ​ ​ -86,350 ​ ​ ​ ​ ​ -509,706 ​ ​ ​ ​ ​ 2,647,958 ​ ​
​
3 (2023)
​ ​ ​ ​ 2,936,041 ​ ​ ​ ​ ​ -478,864 ​ ​ ​ ​ ​ 84,416 ​ ​ ​ ​ ​ -1,451,776 ​ ​ ​ ​ ​ 827,273 ​ ​ ​ ​ ​ -102,269 ​ ​ ​ ​ ​ -679,639 ​ ​ ​ ​ ​ 1,135,182 ​ ​
​
4 (2022)
​ ​ ​ ​ 3,410,910 ​ ​ ​ ​ ​ -69,941 ​ ​ ​ ​ ​ 162,780 ​ ​ ​ ​ ​ -2,054,232 ​ ​ ​ ​ ​ 2,031,140 ​ ​ ​ ​ ​ -419,104 ​ ​ ​ ​ ​ -109,907 ​ ​ ​ ​ ​ 2,951,647 ​ ​
​
5 (2021)
​ ​ ​ ​ 4,157,260 ​ ​ ​ ​ ​ -1,205,814 ​ ​ ​ ​ ​ 530,849 ​ ​ ​ ​ ​ -1,408,117 ​ ​ ​ ​ ​ 1,510,350 ​ ​ ​ ​ ​ -238,540 ​ ​ ​ ​ ​ 125,057 ​ ​ ​ ​ ​ 3,471,045 ​ ​
​
6 (2020)
​ ​ ​ ​ 5,002,344 ​ ​ ​ ​ ​ -1,929,875 ​ ​ ​ ​ ​ 257,161 ​ ​ ​ ​ ​ -1,494,123 ​ ​ ​ ​ ​ 1,499,609 ​ ​ ​ ​ ​ 422,302 ​ ​ ​ ​ ​ 203,013 ​ ​ ​ ​ ​ 3,960,432 ​ ​
​
(a)
The total pension benefit adjustments for each applicable year include the aggregate of two components: (i) the actuarially determined service cost for services rendered by the PEO and non-PEO NEOs during the applicable year (the “service cost”); and (ii) the entire cost of benefits granted in a plan amendment (or initiation) during the applicable year that are attributed by the benefit formula to services rendered in periods prior to the plan amendment or initiation (the “prior service cost”), in each case, calculated in accordance with U.S. GAAP
​
​
Fiscal Year
​ ​
Service
Cost
​ ​
Prior
Service
Cost
​ ​
Total
Pension
Benefit
Adjustments
​
​
a
​ ​
b
​ ​
c
​ ​
d
​
​
PEO#1 (2024)
​ ​ ​ ​ 1,444,389 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 1,444,389 ​ ​
​
PEO#1 (2023)
​ ​ ​ ​ 689,828 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 689,828 ​ ​
​
PEO#1 (2022)
​ ​ ​ ​ 429,463 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 429,463 ​ ​
​
PEO#1 (2021)
​ ​ ​ ​ 336,850 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 336,850 ​ ​
​
PEO#2 (2021)
​ ​ ​ ​ 845,242 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 845,242 ​ ​
​
PEO#2 (2020)
​ ​ ​ ​ 111,326 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 111,326 ​ ​
​
Average Non-PEO NEO (2024)
​ ​ ​ ​ 15,887 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 15,887 ​ ​
​
Average Non-PEO NEO (2023)
​ ​ ​ ​ 84,416 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 84,416 ​ ​
​
Average Non-PEO NEO (2022)
​ ​ ​ ​ 162,780 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 162,780 ​ ​
​
Average Non-PEO NEO (2021)
​ ​ ​ ​ 530,849 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 530,849 ​ ​
​
Average Non-PEO NEO (2020)
​ ​ ​ ​ 257,161 ​ ​ ​ ​ ​ 0 ​ ​ ​ ​ ​ 257,161 ​ ​
​
(b)
For the periods covered, no individual equity awards were granted and vested in the same year and no dividends or other earnings were paid on outstanding and unvested awards. The valuation assumptions used to calculate the fair values of performance shares reflect the probable outcome of the performance conditions as of the applicable measuring date (or actual performance results approved by the Compensation Committee as of the applicable vesting date). Outstanding RSUs accrue dividend equivalent units in the form of additional common shares that are not distributed unless and until the underlying award vests and becomes payable. The value of dividend equivalent units is reflected in the values set forth above.
       
Compensation Actually Paid vs. Total Shareholder Return
Relationship Between CAP for the PEOs and Non-PEO NEOs (Average) vs. TSR
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Compensation Actually Paid vs. Net Income
Relationship Between CAP for the PEOs and Non-PEO NEOs (Average) vs. Net Income
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[MISSING IMAGE: bc_netincome-bw.jpg]
       
Compensation Actually Paid vs. Company Selected Measure
Relationship Between CAP for the PEOs and Non-PEO NEOs (Average) vs.
Non-GAAP EPS
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Total Shareholder Return Vs Peer Group
Relationship Between CAP for the PEOs and Non-PEO NEOs (Average) vs. TSR
[MISSING IMAGE: bc_tsr-bw.jpg]
       
Tabular List, Table
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Most Important Performance Measures
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​ ​ ​ ​
Earnings Per Share
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​ ​ ​ ​
Dividend Growth
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​ ​ ​ ​
Total Shareholder Return
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​ ​ ​ ​
Reliability
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​ ​ ​ ​
Restoration
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Strategic Growth Initiatives
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Total Shareholder Return Amount $ 80 82 107 113 105
Peer Group Total Shareholder Return Amount 127 107 117 116 99
Net Income (Loss) $ 811.7 $ (442.2) $ 1,404.9 $ 1,220.5 $ 1,205.2
Company Selected Measure Amount 4.57 4.34 4.09 3.86 3.64
PEO Name Joseph R. Nolan, Jr.        
Measure:: 1          
Pay vs Performance Disclosure          
Name Earnings Per Share        
Non-GAAP Measure Description
(4)
Set forth in Footnote 1 on page 39 and Exhibit A to the CD&A is a full description of how non-GAAP EPS was determined. The Company believes non-GAAP EPS is a very important measure to investors and which is indicative of Company performance; accordingly, it represents a significant factor in determining both annual and long term executive compensation, though as noted the Compensation Committee determined that due to the disappointing performance in our 2024 stock price, the Committee reduced payout for the EPS-based goal in our 2024 annual incentive plan to 75 percent from 		       
Measure:: 2          
Pay vs Performance Disclosure          
Name Dividend Growth        
Measure:: 3          
Pay vs Performance Disclosure          
Name Total Shareholder Return        
Measure:: 4          
Pay vs Performance Disclosure          
Name Reliability        
Measure:: 5          
Pay vs Performance Disclosure          
Name Restoration        
Measure:: 6          
Pay vs Performance Disclosure          
Name Strategic Growth Initiatives        
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount $ 15,887        
Pension Adjustments Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 15,887        
Pension Adjustments Prior Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 0        
Joseph Nolan [Member]          
Pay vs Performance Disclosure          
PEO Total Compensation Amount 13,578,154 $ 18,885,577 $ 12,959,134 $ 6,467,078  
PEO Actually Paid Compensation Amount 9,503,340 7,429,247 10,858,066 5,120,192  
Joseph Nolan [Member] | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 1,444,389 689,828 429,463 336,850  
Joseph Nolan [Member] | Aggregate Pension Adjustments Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (2,188,733) (7,832,472) (2,143,443) (1,705,782)  
Joseph Nolan [Member] | Pension Adjustments Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 1,444,389 689,828 429,463 336,850  
Joseph Nolan [Member] | Pension Adjustments Prior Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 0 0 0 0  
Joseph Nolan [Member] | Equity Awards Adjustments          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (7,510,128) (8,018,396) (6,825,923) (1,441,650)  
Joseph Nolan [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 7,266,337 6,023,948 6,749,195 1,546,319  
Joseph Nolan [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (2,778,136) (2,136,906) (74,557) 118,712  
Joseph Nolan [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (308,543) (182,331) (235,802) (201,335)  
 James Judge [Member]          
Pay vs Performance Disclosure          
PEO Total Compensation Amount       10,220,941 $ 14,575,276
PEO Actually Paid Compensation Amount       10,910,465 14,062,876
 James Judge [Member] | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount       845,242 111,326
 James Judge [Member] | Aggregate Pension Adjustments Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount       0 (3,742,215)
 James Judge [Member] | Pension Adjustments Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount       845,242 111,326
 James Judge [Member] | Pension Adjustments Prior Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount       0 0
 James Judge [Member] | Equity Awards Adjustments          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount       (6,786,337) (6,682,612)
 James Judge [Member] | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount       7,279,051 6,707,152
 James Judge [Member] | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount       617,814 1,046,301
 James Judge [Member] | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount       (1,266,246) 2,047,648
Non-PEO NEO | Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 15,887 84,416 162,780 530,849 257,161
Non-PEO NEO | Aggregate Pension Adjustments Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (213,868) (478,864) (69,941) (1,205,814) (1,929,875)
Non-PEO NEO | Pension Adjustments Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount   84,416 162,780 530,849 257,161
Non-PEO NEO | Pension Adjustments Prior Service Cost          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount   0 0 0 0
Non-PEO NEO | Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount 1,632,591 827,273 2,031,140 1,510,350 1,499,609
Non-PEO NEO | Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (509,706) (679,639) (109,907) 125,057 203,013
Non-PEO NEO | Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount (86,350) (102,269) (419,104) (238,540) 422,302
Non-PEO NEO | Total Net Adjustments For Equity Awards [Member]          
Pay vs Performance Disclosure          
Adjustment to Compensation, Amount $ (1,687,365) $ (1,451,776) $ (2,054,232) $ (1,408,117) $ (1,494,123)