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MATERIALS, SUPPLIES, AND INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2023
Inventory Disclosure [Abstract]  
Schedule of inventory
Our inventory consisted of:
(in millions)March 31, 2023December 31, 2022
Materials and supplies$276.6 $257.0 
Natural gas in storage137.0 446.3 
Fossil fuel109.9 103.8 
Total$523.5 $807.1