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Pay vs Performance Disclosure
3 Months Ended 9 Months Ended 12 Months Ended 27 Months Ended
Dec. 31, 2020
USD ($)
Sep. 30, 2020
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2022
Pay vs Performance Disclosure [Table]            
Pay vs Performance [Table Text Block]    

Pay versus Performance

In this section, we are providing information about the relationship between the compensation paid to our NEOs and the financial performance of the company, as required by SEC rules. The following table shows the past three fiscal years’ total compensation for our CEO and other NEOs (expressed as an average) as set forth in the Summary Compensation Table, the total compensation actually paid (CAP) to our CEO and other NEOs (expressed as an average), our TSR, our peer group’s TSR over the same period, our net income and our operating EPS.

Pay vs. Performance Table

                            Value of Initial Fixed $100
Investment Based On:
       
Year       Summary
Compensation
Table Total for
CEO(1) ($)
      Compensation
Actually Paid
to CEO(1)(6) ($)
      Summary
Compensation
Table Total for
CEO(2) ($)
      Compensation
Actually Paid
to CEO(2)(6) ($)
      Average
Summary
Compensation
Table Total
for Non-CEO
NEOs(3) ($)
      Average
Compensation
Actually Paid
to Non-CEO
NEOs(3)(6) ($)
      Total
Shareholder
Return(4) ($)
      Peer Group
Total
Shareholder
Return(4) ($)
     

Net
Income ($)

(in millions)

      Operating
Earnings Per
Share(5) ($)
2022   6,794,985   5,095,318   N/A   N/A   2,042,074   1,260,497   83   120   994   4.11
2021   8,161,083   7,796,007   N/A   N/A   5,002,308   4,186,674   102   119   3,288   3.86
2020   7,912,643   6,307,480   16,040,625   15,518,646   3,960,554   3,207,595   95   101   (401)   3.54

(1) The amounts in these columns reflect the Summary Compensation Table and Compensation Actually Paid totals, respectively, for Mr. Blue for fiscal years 2020–2022. Mr. Blue became CEO on October 1, 2020. See footnote 6 below for additional information on how CAP is calculated.
   
(2) The amounts in these columns reflect the Summary Compensation Table and Compensation Actually Paid totals, respectively, for Mr. Thomas F. Farrell, II, who was CEO until October 1, 2020. As he was CEO for a portion of 2020, information is included for the year 2020. See footnote 6 below for additional information on how CAP is calculated.
   
(3) The amounts in these columns reflect the average Summary Compensation Table and average Compensation Actual Paid totals, respectively, for our non-CEO NEOs. For 2022, our non-CEO NEOs were Messrs. Ridge, Stoddard, Brown and Chapman; and Ms. Leopold. For 2021, our non-CEO NEOs were Messrs. Chapman, Stoddard, Brown and Farrell; and Ms. Leopold. For 2020, our non-CEO NEOs were Messrs. Chapman, Stoddard and Brown; and Ms. Leopold. See footnote 6 below for additional information on how CAP is calculated.
   
(4) The calculation of TSR is based on the value of an initial fixed investment of $100 from the beginning of 2020 through the end of 2022 in the table, assuming reinvestment of dividends. The peer group TSR is represented by the S&P 500 Utilities Index.
   
(5) See Reconciliation of Reported Earnings (GAAP) to Operating Earnings (non-GAAP) in Appendix A
   
(6) SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine CAP – “compensation actually paid” – as reported in the Pay vs. Performance Table. The following table details these adjustments:

    Year   Executives   Summary
Compensation
Table Total ($)
  Deduct Change
in Pension
Value(a) ($)
  Deduct Stock
Awards(b) ($)
  Add Pension
Valuation
Adjustment(c) ($)
  Add Equity
Award
Adjustment(d) ($)
  CAP ($)
  2022       CEO       6,794,985       10,107       3,320,036       379,563       1,250,913       5,095,318
      Other NEOs   2,042,074   50,049   614,052   126,361   (243,837)   1,260,497
  2021   CEO   8,161,083   1,235,648   3,250,001   385,293   3,735,280   7,796,007
      Other NEOs   5,002,308   381,847   1,140,029   148,234   558,008   4,186,674
  2020   CEO – Mr. Blue   7,912,643   1,649,066   2,875,039   232,112   2,686,830   6,307,480
      CEO – Mr. Farrell   16,040,625   0   5,975,052   436,684   5,016,389   15,518,646
      Other NEOs   3,960,554   774,402   1,500,033   133,179   1,388,297   3,207,595

    (a) Represents the aggregate change in the actuarial present value of the NEOs’ accumulated benefit under all defined benefit and actuarial pension plans reported in the Summary Compensation Table.
     
  (b) Represents the amounts reported in the Stock Awards column in the Summary Compensation Table.
     
  (c) SEC rules require certain adjustments be made to pension compensation totals to determine CAP. The following table details these adjustments:

        Year   Executives  

Pension Service

Cost Adjustment ($)

 

Prior Service Cost

Adjustment ($)

 

Pension Valuation

Adjustment ($)

    2022       CEO       379,563       0       379,563
        Other NEOs   126,361   0   126,361
    2021   CEO   385,293   0   385,293
        Other NEOs   148,234   0   148,234
    2020   CEO – Mr. Blue   232,112   0   232,112
        CEO – Mr. Farrell   436,684   0   436,684
        Other NEOs   133,179   0   133,179

  (d) SEC rules require certain adjustments be made to equity award totals to determine CAP:
     
     (i) add the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year;
     
  (ii) add the amount of change in fair value as of the end of the applicable year (from the end of the prior fiscal year) of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year;
     (iii) add, for awards that are granted and vest in the same applicable year, the fair value as of the vesting date;
     
  (iv) add, for awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date (from the end of the prior fiscal year);
     
  (v) subtract, for awards granted in prior years that fail to meet the applicable vesting conditions during the applicable year, the amount equal to the fair value at the end of the prior fiscal year; and
     
  (vi) add the dollar value of any dividends or other earnings paid on equity awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year.
     
  The following table details these adjustments:
   
              Unvested Awards   Vested Awards            
    Year       Executives       Year End Fair
Value of Equity
Awards Granted
During Year and
Outstanding
and Unvested
at Year End ($)
      Year over Year
Change in
Fair Value of
Outstanding
and Unvested
Equity Awards
at Year End ($)
      Fair Value as
of Vesting
Date of Equity
Awards
Granted and
Vested During
Year ($)
      Change as of
Vesting Date
from Prior Year
End of Prior
Awards that
Vested During
Year ($)
      Deduct
Forfeited
Awards (Fair
Value at End
of Prior Year)
($)
      Value of
Dividends
and Earnings
Paid ($)
      Equity Award
Adjustment
($)
    2022   CEO   2,604,383   (1,193,284)   -   (458,393)   -   298,207   1,250,913
        Other NEOs   363,026   (302,057)   -   (47,515)   (324,406)   67,115   (243,837)
    2021   CEO   3,589,485   (36,331)   -   (22,254)   -   204,380   3,735,280
        Other NEOs   697,705   51,491   44,342   (16,747)   (309,831)   91,048   558,008
    2020   CEO – Mr. Blue   2,705,268   (157,871)   -   20,434   -   118,999   2,686,830
        CEO – Mr. Farrell   5,210,157   (1,180,658)   -   213,310   -   773,580   5,016,389
        Other NEOs   1,374,044   (94,183)   -   33,137   -   75,299   1,388,297
     
Company Selected Measure Name [1]     Operating Earnings Per Share      
Peer Group Issuers, Footnote [Text Block]     The calculation of TSR is based on the value of an initial fixed investment of $100 from the beginning of 2020 through the end of 2022 in the table, assuming reinvestment of dividends. The peer group TSR is represented by the S&P 500 Utilities Index.      
Adjustment To PEO Compensation, Footnote [Text Block]     SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine CAP – “compensation actually paid” – as reported in the Pay vs. Performance Table. The following table details these adjustments:
    Year   Executives   Summary
Compensation
Table Total ($)
  Deduct Change
in Pension
Value(a) ($)
  Deduct Stock
Awards(b) ($)
  Add Pension
Valuation
Adjustment(c) ($)
  Add Equity
Award
Adjustment(d) ($)
  CAP ($)
  2022       CEO       6,794,985       10,107       3,320,036       379,563       1,250,913       5,095,318
      Other NEOs   2,042,074   50,049   614,052   126,361   (243,837)   1,260,497
  2021   CEO   8,161,083   1,235,648   3,250,001   385,293   3,735,280   7,796,007
      Other NEOs   5,002,308   381,847   1,140,029   148,234   558,008   4,186,674
  2020   CEO – Mr. Blue   7,912,643   1,649,066   2,875,039   232,112   2,686,830   6,307,480
      CEO – Mr. Farrell   16,040,625   0   5,975,052   436,684   5,016,389   15,518,646
      Other NEOs   3,960,554   774,402   1,500,033   133,179   1,388,297   3,207,595

    (a) Represents the aggregate change in the actuarial present value of the NEOs’ accumulated benefit under all defined benefit and actuarial pension plans reported in the Summary Compensation Table.
     
  (b) Represents the amounts reported in the Stock Awards column in the Summary Compensation Table.
     
  (c) SEC rules require certain adjustments be made to pension compensation totals to determine CAP. The following table details these adjustments:

        Year   Executives  

Pension Service

Cost Adjustment ($)

 

Prior Service Cost

Adjustment ($)

 

Pension Valuation

Adjustment ($)

    2022       CEO       379,563       0       379,563
        Other NEOs   126,361   0   126,361
    2021   CEO   385,293   0   385,293
        Other NEOs   148,234   0   148,234
    2020   CEO – Mr. Blue   232,112   0   232,112
        CEO – Mr. Farrell   436,684   0   436,684
        Other NEOs   133,179   0   133,179

  (d) SEC rules require certain adjustments be made to equity award totals to determine CAP:
     
     (i) add the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year;
     
  (ii) add the amount of change in fair value as of the end of the applicable year (from the end of the prior fiscal year) of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year;
     (iii) add, for awards that are granted and vest in the same applicable year, the fair value as of the vesting date;
     
  (iv) add, for awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date (from the end of the prior fiscal year);
     
  (v) subtract, for awards granted in prior years that fail to meet the applicable vesting conditions during the applicable year, the amount equal to the fair value at the end of the prior fiscal year; and
     
  (vi) add the dollar value of any dividends or other earnings paid on equity awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year.
     
  The following table details these adjustments:
   
              Unvested Awards   Vested Awards            
    Year       Executives       Year End Fair
Value of Equity
Awards Granted
During Year and
Outstanding
and Unvested
at Year End ($)
      Year over Year
Change in
Fair Value of
Outstanding
and Unvested
Equity Awards
at Year End ($)
      Fair Value as
of Vesting
Date of Equity
Awards
Granted and
Vested During
Year ($)
      Change as of
Vesting Date
from Prior Year
End of Prior
Awards that
Vested During
Year ($)
      Deduct
Forfeited
Awards (Fair
Value at End
of Prior Year)
($)
      Value of
Dividends
and Earnings
Paid ($)
      Equity Award
Adjustment
($)
    2022   CEO   2,604,383   (1,193,284)   -   (458,393)   -   298,207   1,250,913
        Other NEOs   363,026   (302,057)   -   (47,515)   (324,406)   67,115   (243,837)
    2021   CEO   3,589,485   (36,331)   -   (22,254)   -   204,380   3,735,280
        Other NEOs   697,705   51,491   44,342   (16,747)   (309,831)   91,048   558,008
    2020   CEO – Mr. Blue   2,705,268   (157,871)   -   20,434   -   118,999   2,686,830
        CEO – Mr. Farrell   5,210,157   (1,180,658)   -   213,310   -   773,580   5,016,389
        Other NEOs   1,374,044   (94,183)   -   33,137   -   75,299   1,388,297
     
Non-PEO NEO Average Total Compensation Amount [2]     $ 2,042,074 $ 5,002,308 $ 3,960,554  
Non-PEO NEO Average Compensation Actually Paid Amount [2],[3]     $ 1,260,497 4,186,674 3,207,595  
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]     SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine CAP – “compensation actually paid” – as reported in the Pay vs. Performance Table. The following table details these adjustments:
    Year   Executives   Summary
Compensation
Table Total ($)
  Deduct Change
in Pension
Value(a) ($)
  Deduct Stock
Awards(b) ($)
  Add Pension
Valuation
Adjustment(c) ($)
  Add Equity
Award
Adjustment(d) ($)
  CAP ($)
  2022       CEO       6,794,985       10,107       3,320,036       379,563       1,250,913       5,095,318
      Other NEOs   2,042,074   50,049   614,052   126,361   (243,837)   1,260,497
  2021   CEO   8,161,083   1,235,648   3,250,001   385,293   3,735,280   7,796,007
      Other NEOs   5,002,308   381,847   1,140,029   148,234   558,008   4,186,674
  2020   CEO – Mr. Blue   7,912,643   1,649,066   2,875,039   232,112   2,686,830   6,307,480
      CEO – Mr. Farrell   16,040,625   0   5,975,052   436,684   5,016,389   15,518,646
      Other NEOs   3,960,554   774,402   1,500,033   133,179   1,388,297   3,207,595

    (a) Represents the aggregate change in the actuarial present value of the NEOs’ accumulated benefit under all defined benefit and actuarial pension plans reported in the Summary Compensation Table.
     
  (b) Represents the amounts reported in the Stock Awards column in the Summary Compensation Table.
     
  (c) SEC rules require certain adjustments be made to pension compensation totals to determine CAP. The following table details these adjustments:

        Year   Executives  

Pension Service

Cost Adjustment ($)

 

Prior Service Cost

Adjustment ($)

 

Pension Valuation

Adjustment ($)

    2022       CEO       379,563       0       379,563
        Other NEOs   126,361   0   126,361
    2021   CEO   385,293   0   385,293
        Other NEOs   148,234   0   148,234
    2020   CEO – Mr. Blue   232,112   0   232,112
        CEO – Mr. Farrell   436,684   0   436,684
        Other NEOs   133,179   0   133,179

  (d) SEC rules require certain adjustments be made to equity award totals to determine CAP:
     
     (i) add the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year;
     
  (ii) add the amount of change in fair value as of the end of the applicable year (from the end of the prior fiscal year) of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year;
     (iii) add, for awards that are granted and vest in the same applicable year, the fair value as of the vesting date;
     
  (iv) add, for awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date (from the end of the prior fiscal year);
     
  (v) subtract, for awards granted in prior years that fail to meet the applicable vesting conditions during the applicable year, the amount equal to the fair value at the end of the prior fiscal year; and
     
  (vi) add the dollar value of any dividends or other earnings paid on equity awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year.
     
  The following table details these adjustments:
   
              Unvested Awards   Vested Awards            
    Year       Executives       Year End Fair
Value of Equity
Awards Granted
During Year and
Outstanding
and Unvested
at Year End ($)
      Year over Year
Change in
Fair Value of
Outstanding
and Unvested
Equity Awards
at Year End ($)
      Fair Value as
of Vesting
Date of Equity
Awards
Granted and
Vested During
Year ($)
      Change as of
Vesting Date
from Prior Year
End of Prior
Awards that
Vested During
Year ($)
      Deduct
Forfeited
Awards (Fair
Value at End
of Prior Year)
($)
      Value of
Dividends
and Earnings
Paid ($)
      Equity Award
Adjustment
($)
    2022   CEO   2,604,383   (1,193,284)   -   (458,393)   -   298,207   1,250,913
        Other NEOs   363,026   (302,057)   -   (47,515)   (324,406)   67,115   (243,837)
    2021   CEO   3,589,485   (36,331)   -   (22,254)   -   204,380   3,735,280
        Other NEOs   697,705   51,491   44,342   (16,747)   (309,831)   91,048   558,008
    2020   CEO – Mr. Blue   2,705,268   (157,871)   -   20,434   -   118,999   2,686,830
        CEO – Mr. Farrell   5,210,157   (1,180,658)   -   213,310   -   773,580   5,016,389
        Other NEOs   1,374,044   (94,183)   -   33,137   -   75,299   1,388,297
     
Equity Valuation Assumption Difference, Footnote [Text Block]     SEC rules require certain adjustments be made to equity award totals to determine CAP:   
     (i) add the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year;
     
  (ii) add the amount of change in fair value as of the end of the applicable year (from the end of the prior fiscal year) of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year;
     (iii) add, for awards that are granted and vest in the same applicable year, the fair value as of the vesting date;
     
  (iv) add, for awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date (from the end of the prior fiscal year);
     
  (v) subtract, for awards granted in prior years that fail to meet the applicable vesting conditions during the applicable year, the amount equal to the fair value at the end of the prior fiscal year; and
     
  (vi) add the dollar value of any dividends or other earnings paid on equity awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year.
     
  The following table details these adjustments:
   
              Unvested Awards   Vested Awards            
    Year       Executives       Year End Fair
Value of Equity
Awards Granted
During Year and
Outstanding
and Unvested
at Year End ($)
      Year over Year
Change in
Fair Value of
Outstanding
and Unvested
Equity Awards
at Year End ($)
      Fair Value as
of Vesting
Date of Equity
Awards
Granted and
Vested During
Year ($)
      Change as of
Vesting Date
from Prior Year
End of Prior
Awards that
Vested During
Year ($)
      Deduct
Forfeited
Awards (Fair
Value at End
of Prior Year)
($)
      Value of
Dividends
and Earnings
Paid ($)
      Equity Award
Adjustment
($)
    2022   CEO   2,604,383   (1,193,284)   -   (458,393)   -   298,207   1,250,913
        Other NEOs   363,026   (302,057)   -   (47,515)   (324,406)   67,115   (243,837)
    2021   CEO   3,589,485   (36,331)   -   (22,254)   -   204,380   3,735,280
        Other NEOs   697,705   51,491   44,342   (16,747)   (309,831)   91,048   558,008
    2020   CEO – Mr. Blue   2,705,268   (157,871)   -   20,434   -   118,999   2,686,830
        CEO – Mr. Farrell   5,210,157   (1,180,658)   -   213,310   -   773,580   5,016,389
        Other NEOs   1,374,044   (94,183)   -   33,137   -   75,299   1,388,297
     
Compensation Actually Paid vs. Total Shareholder Return [Text Block]    

 

     
Compensation Actually Paid vs. Net Income [Text Block]    

     
Compensation Actually Paid vs. Company Selected Measure [Text Block]    

     
Tabular List [Table Text Block]    

Most Important Performance Measures Table

The three items listed below represent the most important performance measures we used to link compensation actually paid to our NEOs for 2022 to company performance, as further described in the Annual Incentive Plan and the Long-Term Incentive Plan sections of our CD&A.

Operating Earnings Per Share Relative Total Shareholder Return Return on Invested Capital
     
Total Shareholder Return Amount [4]     $ 83 102 95  
Peer Group Total Shareholder Return Amount [4]     120 119 101  
Net Income (Loss)     $ 994 $ 3,288 $ (401)  
Company Selected Measure Amount [1]     4.11 3.86 3.54  
PEO Name   Thomas F. Farrell, II       Mr. Blue
Measure [Axis]: 1            
Pay vs Performance Disclosure [Table]            
Measure Name     Operating Earnings Per Share      
Measure [Axis]: 2            
Pay vs Performance Disclosure [Table]            
Measure Name     Relative Total Shareholder Return      
Measure [Axis]: 3            
Pay vs Performance Disclosure [Table]            
Measure Name     Return on Invested Capital      
Mr. Blue [Member]            
Pay vs Performance Disclosure [Table]            
PEO Total Compensation Amount [5]     $ 6,794,985 $ 8,161,083 $ 7,912,643  
PEO Actually Paid Compensation Amount [3],[5]     5,095,318 7,796,007 6,307,480  
Mr. Thomas F. Farrell [Member]            
Pay vs Performance Disclosure [Table]            
PEO Total Compensation Amount [6]         16,040,625  
PEO Actually Paid Compensation Amount [3],[6]         15,518,646  
PEO [Member] | Deduct Change in Pension Value [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [7]     10,107 1,235,648    
PEO [Member] | Deduct Stock Awards [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [8]     3,320,036 3,250,001    
PEO [Member] | Add Pension Valuation Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [9]     379,563 385,293    
PEO [Member] | Add Equity Award Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [10]     1,250,913 3,735,280    
PEO [Member] | Pension Service Cost Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     379,563 385,293    
PEO [Member] | Prior Service Cost Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     0 0    
PEO [Member] | Unvested Awards Year End Fair Value of Equity Awards Granted During Year and Outstanding and Unvested at Year End [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     2,604,383 3,589,485    
PEO [Member] | Unvested Awards Year Over Year Change in Fair Value of Outstanding and Unvested Equity Awards at Year End [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     (1,193,284) (36,331)    
PEO [Member] | Vested Awards Change in Vesting Date from Prior Year End of Prior Awards that Vested During Year [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     (458,393) (22,254)    
PEO [Member] | Vested Awards Fair Value as of Vesting Date of Equity Awards Granted and Vested During Year [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount        
PEO [Member] | Deduct Forfeited Awards (Fair Value at End of Prior Year) [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount        
PEO [Member] | Value of Dividends and Earnings Paid [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     298,207 204,380    
PEO [Member] | Mr. Blue [Member] | Deduct Change in Pension Value [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [7]   $ 1,649,066        
PEO [Member] | Mr. Blue [Member] | Deduct Stock Awards [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [8]   2,875,039        
PEO [Member] | Mr. Blue [Member] | Add Pension Valuation Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [9]   232,112        
PEO [Member] | Mr. Blue [Member] | Add Equity Award Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [10]   2,686,830        
PEO [Member] | Mr. Blue [Member] | Pension Service Cost Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount   232,112        
PEO [Member] | Mr. Blue [Member] | Prior Service Cost Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount   0        
PEO [Member] | Mr. Blue [Member] | Unvested Awards Year End Fair Value of Equity Awards Granted During Year and Outstanding and Unvested at Year End [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount   2,705,268        
PEO [Member] | Mr. Blue [Member] | Unvested Awards Year Over Year Change in Fair Value of Outstanding and Unvested Equity Awards at Year End [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount   (157,871)        
PEO [Member] | Mr. Blue [Member] | Vested Awards Change in Vesting Date from Prior Year End of Prior Awards that Vested During Year [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount   20,434        
PEO [Member] | Mr. Blue [Member] | Vested Awards Fair Value as of Vesting Date of Equity Awards Granted and Vested During Year [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount          
PEO [Member] | Mr. Blue [Member] | Deduct Forfeited Awards (Fair Value at End of Prior Year) [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount          
PEO [Member] | Mr. Blue [Member] | Value of Dividends and Earnings Paid [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount   $ 118,999        
PEO [Member] | Mr. Thomas F. Farrell [Member] | Deduct Change in Pension Value [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [7] $ 0          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Deduct Stock Awards [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [8] 5,975,052          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Add Pension Valuation Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [9] 436,684          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Add Equity Award Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [10] 5,016,389          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Pension Service Cost Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount 436,684          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Prior Service Cost Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount 0          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Unvested Awards Year End Fair Value of Equity Awards Granted During Year and Outstanding and Unvested at Year End [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount 5,210,157          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Unvested Awards Year Over Year Change in Fair Value of Outstanding and Unvested Equity Awards at Year End [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount (1,180,658)          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Vested Awards Change in Vesting Date from Prior Year End of Prior Awards that Vested During Year [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount 213,310          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Vested Awards Fair Value as of Vesting Date of Equity Awards Granted and Vested During Year [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Deduct Forfeited Awards (Fair Value at End of Prior Year) [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount          
PEO [Member] | Mr. Thomas F. Farrell [Member] | Value of Dividends and Earnings Paid [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount $ 773,580          
Non-PEO NEO [Member] | Deduct Change in Pension Value [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [7]     50,049 381,847 774,402  
Non-PEO NEO [Member] | Deduct Stock Awards [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [8]     614,052 1,140,029 1,500,033  
Non-PEO NEO [Member] | Add Pension Valuation Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [9]     126,361 148,234 133,179  
Non-PEO NEO [Member] | Add Equity Award Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount [10]     (243,837) 558,008 1,388,297  
Non-PEO NEO [Member] | Pension Service Cost Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     126,361 148,234 133,179  
Non-PEO NEO [Member] | Prior Service Cost Adjustment [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     0 0 0  
Non-PEO NEO [Member] | Unvested Awards Year End Fair Value of Equity Awards Granted During Year and Outstanding and Unvested at Year End [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     363,026 697,705 1,374,044  
Non-PEO NEO [Member] | Unvested Awards Year Over Year Change in Fair Value of Outstanding and Unvested Equity Awards at Year End [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     (302,057) 51,491 (94,183)  
Non-PEO NEO [Member] | Vested Awards Change in Vesting Date from Prior Year End of Prior Awards that Vested During Year [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     (47,515) (16,747) 33,137  
Non-PEO NEO [Member] | Vested Awards Fair Value as of Vesting Date of Equity Awards Granted and Vested During Year [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     44,342  
Non-PEO NEO [Member] | Deduct Forfeited Awards (Fair Value at End of Prior Year) [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     (324,406) (309,831)  
Non-PEO NEO [Member] | Value of Dividends and Earnings Paid [Member]            
Pay vs Performance Disclosure [Table]            
Adjustment to Compensation Amount     $ 67,115 $ 91,048 $ 75,299  
[1] See Reconciliation of Reported Earnings (GAAP) to Operating Earnings (non-GAAP) in Appendix A
[2] (3)The amounts in these columns reflect the average Summary Compensation Table and average Compensation Actual Paid totals, respectively, for our non-CEO NEOs. For 2022, our non-CEO NEOs were Messrs. Ridge, Stoddard, Brown and Chapman; and Ms. Leopold. For 2021, our non-CEO NEOs were Messrs. Chapman, Stoddard, Brown and Farrell; and Ms. Leopold. For 2020, our non-CEO NEOs were Messrs. Chapman, Stoddard and Brown; and Ms. Leopold. See footnote 6 below for additional information on how CAP is calculated.
[3] SEC rules require certain adjustments be made to the Summary Compensation Table totals to determine CAP – “compensation actually paid” – as reported in the Pay vs. Performance Table. The following table details these adjustments:
    Year   Executives   Summary
Compensation
Table Total ($)
  Deduct Change
in Pension
Value(a) ($)
  Deduct Stock
Awards(b) ($)
  Add Pension
Valuation
Adjustment(c) ($)
  Add Equity
Award
Adjustment(d) ($)
  CAP ($)
  2022       CEO       6,794,985       10,107       3,320,036       379,563       1,250,913       5,095,318
      Other NEOs   2,042,074   50,049   614,052   126,361   (243,837)   1,260,497
  2021   CEO   8,161,083   1,235,648   3,250,001   385,293   3,735,280   7,796,007
      Other NEOs   5,002,308   381,847   1,140,029   148,234   558,008   4,186,674
  2020   CEO – Mr. Blue   7,912,643   1,649,066   2,875,039   232,112   2,686,830   6,307,480
      CEO – Mr. Farrell   16,040,625   0   5,975,052   436,684   5,016,389   15,518,646
      Other NEOs   3,960,554   774,402   1,500,033   133,179   1,388,297   3,207,595

    (a) Represents the aggregate change in the actuarial present value of the NEOs’ accumulated benefit under all defined benefit and actuarial pension plans reported in the Summary Compensation Table.
     
  (b) Represents the amounts reported in the Stock Awards column in the Summary Compensation Table.
     
  (c) SEC rules require certain adjustments be made to pension compensation totals to determine CAP. The following table details these adjustments:

        Year   Executives  

Pension Service

Cost Adjustment ($)

 

Prior Service Cost

Adjustment ($)

 

Pension Valuation

Adjustment ($)

    2022       CEO       379,563       0       379,563
        Other NEOs   126,361   0   126,361
    2021   CEO   385,293   0   385,293
        Other NEOs   148,234   0   148,234
    2020   CEO – Mr. Blue   232,112   0   232,112
        CEO – Mr. Farrell   436,684   0   436,684
        Other NEOs   133,179   0   133,179

  (d) SEC rules require certain adjustments be made to equity award totals to determine CAP:
     
     (i) add the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year;
     
  (ii) add the amount of change in fair value as of the end of the applicable year (from the end of the prior fiscal year) of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year;
     (iii) add, for awards that are granted and vest in the same applicable year, the fair value as of the vesting date;
     
  (iv) add, for awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date (from the end of the prior fiscal year);
     
  (v) subtract, for awards granted in prior years that fail to meet the applicable vesting conditions during the applicable year, the amount equal to the fair value at the end of the prior fiscal year; and
     
  (vi) add the dollar value of any dividends or other earnings paid on equity awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year.
     
  The following table details these adjustments:
   
              Unvested Awards   Vested Awards            
    Year       Executives       Year End Fair
Value of Equity
Awards Granted
During Year and
Outstanding
and Unvested
at Year End ($)
      Year over Year
Change in
Fair Value of
Outstanding
and Unvested
Equity Awards
at Year End ($)
      Fair Value as
of Vesting
Date of Equity
Awards
Granted and
Vested During
Year ($)
      Change as of
Vesting Date
from Prior Year
End of Prior
Awards that
Vested During
Year ($)
      Deduct
Forfeited
Awards (Fair
Value at End
of Prior Year)
($)
      Value of
Dividends
and Earnings
Paid ($)
      Equity Award
Adjustment
($)
    2022   CEO   2,604,383   (1,193,284)   -   (458,393)   -   298,207   1,250,913
        Other NEOs   363,026   (302,057)   -   (47,515)   (324,406)   67,115   (243,837)
    2021   CEO   3,589,485   (36,331)   -   (22,254)   -   204,380   3,735,280
        Other NEOs   697,705   51,491   44,342   (16,747)   (309,831)   91,048   558,008
    2020   CEO – Mr. Blue   2,705,268   (157,871)   -   20,434   -   118,999   2,686,830
        CEO – Mr. Farrell   5,210,157   (1,180,658)   -   213,310   -   773,580   5,016,389
        Other NEOs   1,374,044   (94,183)   -   33,137   -   75,299   1,388,297
[4] The calculation of TSR is based on the value of an initial fixed investment of $100 from the beginning of 2020 through the end of 2022 in the table, assuming reinvestment of dividends. The peer group TSR is represented by the S&P 500 Utilities Index.
[5] The amounts in these columns reflect the Summary Compensation Table and Compensation Actually Paid totals, respectively, for Mr. Blue for fiscal years 2020–2022. Mr. Blue became CEO on October 1, 2020. See footnote 6 below for additional information on how CAP is calculated.
[6] (2)The amounts in these columns reflect the Summary Compensation Table and Compensation Actually Paid totals, respectively, for Mr. Thomas F. Farrell, II, who was CEO until October 1, 2020. As he was CEO for a portion of 2020, information is included for the year 2020. See footnote 6 below for additional information on how CAP is calculated.
[7] Represents the aggregate change in the actuarial present value of the NEOs’ accumulated benefit under all defined benefit and actuarial pension plans reported in the Summary Compensation Table.
[8] Represents the amounts reported in the Stock Awards column in the Summary Compensation Table.
[9] SEC rules require certain adjustments be made to pension compensation totals to determine CAP. The following table details these adjustments:
        Year   Executives  

Pension Service

Cost Adjustment ($)

 

Prior Service Cost

Adjustment ($)

 

Pension Valuation

Adjustment ($)

    2022       CEO       379,563       0       379,563
        Other NEOs   126,361   0   126,361
    2021   CEO   385,293   0   385,293
        Other NEOs   148,234   0   148,234
    2020   CEO – Mr. Blue   232,112   0   232,112
        CEO – Mr. Farrell   436,684   0   436,684
        Other NEOs   133,179   0   133,179

[10] SEC rules require certain adjustments be made to equity award totals to determine CAP:   
     (i) add the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year;
     
  (ii) add the amount of change in fair value as of the end of the applicable year (from the end of the prior fiscal year) of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year;
     (iii) add, for awards that are granted and vest in the same applicable year, the fair value as of the vesting date;
     
  (iv) add, for awards granted in prior years that vest in the applicable year, the amount equal to the change in fair value as of the vesting date (from the end of the prior fiscal year);
     
  (v) subtract, for awards granted in prior years that fail to meet the applicable vesting conditions during the applicable year, the amount equal to the fair value at the end of the prior fiscal year; and
     
  (vi) add the dollar value of any dividends or other earnings paid on equity awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year.
     
  The following table details these adjustments:
   
              Unvested Awards   Vested Awards            
    Year       Executives       Year End Fair
Value of Equity
Awards Granted
During Year and
Outstanding
and Unvested
at Year End ($)
      Year over Year
Change in
Fair Value of
Outstanding
and Unvested
Equity Awards
at Year End ($)
      Fair Value as
of Vesting
Date of Equity
Awards
Granted and
Vested During
Year ($)
      Change as of
Vesting Date
from Prior Year
End of Prior
Awards that
Vested During
Year ($)
      Deduct
Forfeited
Awards (Fair
Value at End
of Prior Year)
($)
      Value of
Dividends
and Earnings
Paid ($)
      Equity Award
Adjustment
($)
    2022   CEO   2,604,383   (1,193,284)   -   (458,393)   -   298,207   1,250,913
        Other NEOs   363,026   (302,057)   -   (47,515)   (324,406)   67,115   (243,837)
    2021   CEO   3,589,485   (36,331)   -   (22,254)   -   204,380   3,735,280
        Other NEOs   697,705   51,491   44,342   (16,747)   (309,831)   91,048   558,008
    2020   CEO – Mr. Blue   2,705,268   (157,871)   -   20,434   -   118,999   2,686,830
        CEO – Mr. Farrell   5,210,157   (1,180,658)   -   213,310   -   773,580   5,016,389
        Other NEOs   1,374,044   (94,183)   -   33,137   -   75,299   1,388,297