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MATERIALS, SUPPLIES, AND INVENTORIES
6 Months Ended
Jun. 30, 2025
Inventory Disclosure [Abstract]  
MATERIALS, SUPPLIES, AND INVENTORIES MATERIALS, SUPPLIES, AND INVENTORIES
Our inventories consisted of:
(in millions)June 30, 2025December 31, 2024
Materials and supplies$100.4 $100.8 
Fossil fuel38.7 39.9 
Natural gas in storage19.1 26.4 
Total$158.2 $167.1 

Substantially all materials and supplies, fossil fuel, and natural gas in storage inventories are recorded using the weighted-average cost method of accounting.