v3.26.1
FAIR VALUE MEASUREMENTS (Tables)
 6 Months Ended
Jun. 30, 2026
Fair Value Disclosures [Abstract]  
Schedule of fair value of assets and liabilities measured on a recurring basis categorized by level within the fair value hierarchy
The following tables summarize our financial assets and liabilities that were accounted for at fair value on a recurring basis, categorized by level within the fair value hierarchy:
June 30, 2026
(in millions)Level 1Level 2Level 3Total
Derivative assets
Natural gas contracts$0.3 $6.5 $— $6.8 
FTRs— — 10.2 10.2 
Total derivative assets$0.3 $6.5 $10.2 $17.0 
Derivative liabilities
Natural gas contracts$5.4 $1.2 $— $6.6 

December 31, 2025
(in millions)Level 1Level 2Level 3Total
Derivative assets
Natural gas contracts$0.1 $5.5 $— $5.6 
FTRs— — 2.3 2.3 
Total derivative assets$0.1 $5.5 $2.3 $7.9 
Derivative liabilities
Natural gas contracts$3.4 $0.6 $— $4.0 
Reconciliation of changes in the fair value of items categorized as level 3 measurements
The following table summarizes the changes to derivatives classified as Level 3 in the fair value hierarchy:
Three Months Ended June 30Six Months Ended June 30
(in millions)2026202520262025
Balance at the beginning of the period$0.7 $0.4 $2.3 $2.0 
Purchases11.4 7.2 11.4 7.2 
Sales(0.1)— (0.2)— 
Settlements(1.8)(1.3)(3.3)(2.9)
Balance at the end of the period$10.2 $6.3 $10.2 $6.3 
Schedule of carrying value and fair value of financial instruments not recorded at fair value
The following table shows the financial instruments included on our balance sheets that were not recorded at fair value:
June 30, 2026December 31, 2025
(in millions)Carrying AmountFair ValueCarrying AmountFair Value
Long-term debt$2,257.4 $1,898.8 $1,959.3 $1,626.0