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Inventories (Tables)
6 Months Ended
Dec. 31, 2020
Inventory, Net [Abstract]  
Schedule of inventories
Inventories consisted of the following components as of December 31, 2020 and June 30, 2020:
 
($ in millions)December 31,
2020
June 30,
2020
Raw materials and supplies$174.4 $217.6 
Work in process244.3 312.3 
Finished and purchased products146.4 194.4 
Total inventories$565.1 $724.3