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MATERIALS, SUPPLIES, AND INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2024
Inventory Disclosure [Abstract]  
Schedule of inventory
Our inventories consisted of:
(in millions)June 30, 2024December 31, 2023
Materials and supplies$350.3 $320.0 
Natural gas in storage239.0 327.8 
Fossil fuel106.5 127.4 
Total$695.8 $775.2