v3.26.1
FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)
6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments Carrying amounts and estimated fair values are as follows:
EversourceCL&PNSTAR ElectricPSNH
(Millions of Dollars)Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
As of June 30, 2026:
Preferred Stock Not Subject to Mandatory Redemption
$155.6 $123.7 $116.2 $91.1 $43.0 $32.6 $— $— 
Long-Term Debt29,111.6 27,713.4 5,111.3 4,782.8 6,341.8 6,089.2 2,234.5 2,054.1 
Rate Reduction Bonds302.5 294.6 — — — — 302.5 294.6 
As of December 31, 2025:
Preferred Stock Not Subject to Mandatory Redemption
$155.6 $126.1 $116.2 $92.9 $43.0 $33.2 $— $— 
Long-Term Debt28,265.4 27,055.5 5,110.1 4,844.7 5,945.6 5,752.6 2,031.3 1,874.8 
Rate Reduction Bonds324.1 320.2 — — — — 324.1 320.2