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MATERIALS, SUPPLIES, AND INVENTORIES (Tables)
9 Months Ended
Sep. 30, 2022
Inventory Disclosure [Abstract]  
Schedule of inventory
Our inventory consisted of:
(in millions)September 30, 2022December 31, 2021
Natural gas in storage$591.0 $326.0 
Materials and supplies250.6 225.3 
Fossil fuel83.0 84.5 
Total$924.6 $635.8