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MATERIALS, SUPPLIES, AND INVENTORIES (Tables)
3 Months Ended
Mar. 31, 2022
Inventory Disclosure [Abstract]  
Schedule of inventory
Our inventory consisted of:
(in millions)March 31, 2022December 31, 2021
Materials and supplies$232.2 $225.3 
Fossil fuel81.3 84.5 
Natural gas in storage55.3 326.0 
Total$368.8 $635.8