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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
 12 Months Ended
Dec. 31, 2025
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, 2025, 2024 AND 2023
(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:     
 2025$556,164 $101,141 $120,006 $196,772 $580,539 
 2024554,455 74,069 119,659 192,019 556,164 
 2023486,297 72,468 158,205 162,515 554,455 
CL&P:     
Reserves Deducted from Assets -     
Reserves for Uncollectible Accounts:     
 2025$279,108 $17,949 $43,110 $81,653 $258,514 
 2024296,030 17,190 46,840 80,952 279,108 
 2023225,320 11,675 126,360 67,325 296,030 
NSTAR Electric:     
Reserves Deducted from Assets -     
Reserves for Uncollectible Accounts:     
 2025$114,910 $41,430 $37,050 $60,829 $132,561 
 202497,026 33,607 37,653 53,376 114,910 
 202394,958 22,791 17,488 38,211 97,026 
PSNH:
     
Reserves Deducted from Assets -     
Reserves for Uncollectible Accounts:     
 2025$14,090 $11,973 $7,193 $9,709 $23,547 
 202414,322 4,688 5,131 10,051 14,090 
 202329,236 3,989 (8,735)10,168 14,322 

(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.