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MATERIALS, SUPPLIES, AND INVENTORIES (Tables)
9 Months Ended
Sep. 30, 2025
Inventory Disclosure [Abstract]  
Schedule of inventory
Our inventories consisted of:
(in millions)September 30, 2025December 31, 2024
Materials and supplies$395.6 $412.5 
Natural gas in storage358.4 300.2 
Fossil fuel88.8 100.5 
Total$842.8 $813.2