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MATERIALS, SUPPLIES, AND INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2022
Inventory Disclosure [Abstract]  
Schedule of inventory
Our inventory consisted of:
(in millions)June 30, 2022December 31, 2021
Natural gas in storage$244.4 $326.0 
Materials and supplies242.7 225.3 
Fossil fuel85.1 84.5 
Total$572.2 $635.8