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Inventories (Tables)
9 Months Ended
Mar. 31, 2021
Inventory, Net [Abstract]  
Schedule of inventories
Inventories consisted of the following components as of March 31, 2021 and June 30, 2020:
 
($ in millions)March 31,
2021
June 30,
2020
Raw materials and supplies$160.9 $217.6 
Work in process239.6 312.3 
Finished and purchased products135.0 194.4 
Total inventories$535.5 $724.3