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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
 12 Months Ended
Dec. 31, 2024
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
SCHEDULE II
EVERSOURCE ENERGY AND SUBSIDIARIES
VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
FOR THE YEARS ENDED DECEMBER 31, 2024, 2023 AND 2022
(Thousands of Dollars)
Column AColumn BColumn CColumn DColumn E
  Additions  
  (1)(2)  
Description:Balance as of Beginning of YearCharged to Costs and ExpensesCharged to Other
Accounts -
Describe (a)		 Deductions -Describe (b)Balance as of End of Year
Eversource:
     
Reserves Deducted from Assets -     
Reserves for Uncollectible Accounts:     
 2024$554,455 $74,069 $119,659 $192,019 $556,164 
 2023486,297 72,468 158,205 162,515 554,455 
 2022417,406 61,876 112,533 105,518 486,297 
CL&P:     
Reserves Deducted from Assets -     
Reserves for Uncollectible Accounts:     
 2024$296,030 $17,190 $46,840 $80,952 $279,108 
 2023225,320 11,675 126,360 67,325 296,030 
 2022181,319 15,578 59,485 31,062 225,320 
NSTAR Electric:     
Reserves Deducted from Assets -     
Reserves for Uncollectible Accounts:     
 2024$97,026 $33,607 $37,653 $53,376 $114,910 
 202394,958 22,791 17,488 38,211 97,026 
 202297,005 21,550 12,412 36,009 94,958 
PSNH:
     
Reserves Deducted from Assets -     
Reserves for Uncollectible Accounts:     
 2024$14,322 $4,688 $5,131 $10,051 $14,090 
 202329,236 3,989 (8,735)10,168 14,322 
 202224,331 9,211 2,539 6,845 29,236 

(a)    Amounts relate to uncollectible accounts receivables reserved for that are not charged to bad debt expense. CL&P, NSTAR Electric, NSTAR Gas, EGMA and Yankee Gas are allowed to recover in rates, amounts associated with certain uncollectible hardship accounts receivable. CL&P, NSTAR Electric, PSNH, NSTAR Gas and EGMA are also allowed to recover uncollectible energy supply costs through regulatory tracking mechanisms.
(b)    Amounts written off, net of recoveries.