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INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Inventories Table Inventories consisted of the following:
 June 30, 2021December 31,
2020
June 30, 2020
 ($ in millions)
Supplies$115.0 $113.8 $111.6 
Raw materials145.1 116.3 64.6 
Work in process145.1 133.2 94.0 
Finished goods420.9 359.6 392.7 
Inventories excluding LIFO reserve826.1 722.9 662.9 
LIFO reserve(89.6)(48.2)(43.8)
Inventories, net$736.5 $674.7 $619.1