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RATE REDUCTION BONDS AND VARIABLE INTEREST ENTITIES (Tables)
9 Months Ended
Sep. 30, 2025
Rate Reduction Bonds and Variable Interest Entity [Abstract]  
Summary of the Impact of Funding on the Balance Sheets and Income Statements
The following tables summarize the impact of PSNH Funding on PSNH's balance sheets and income statements:
(Millions of Dollars)
PSNH Balance Sheets:As of September 30, 2025As of December 31, 2024
Restricted Cash - Current Portion (included in Special Deposits)$18.0 $31.0 
Restricted Cash - Long-Term Portion (included in Other Long-Term Assets)3.2 3.1 
Securitized Stranded Cost (included in Regulatory Assets)316.9 349.3 
Other Regulatory Liabilities (included in Regulatory Liabilities)8.5 6.9 
Accrued Interest (included in Other Current Liabilities)2.0 5.7 
Rate Reduction Bonds - Current Portion43.2 43.2 
Rate Reduction Bonds - Long-Term Portion280.9 324.1 

(Millions of Dollars)
PSNH Income Statements:
For the Three Months EndedFor the Nine Months Ended
September 30, 2025September 30, 2024September 30, 2025September 30, 2024
Amortization of RRB Principal (included in Amortization of
   Regulatory Assets/(Liabilities), Net)
$10.8 $10.8 $32.4 $32.4 
Interest Expense on RRB Principal (included in Interest Expense)3.1 3.5 9.7 10.8