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Inventories (Tables)
12 Months Ended
Jun. 30, 2021
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories consisted of the following components at June 30, 2021 and 2020:
    
 June 30,
($ in millions)20212020
Raw materials and supplies$115.0 $217.6 
Work in process206.2 312.3 
Finished and purchased products104.5 194.4 
Total inventory$425.7 $724.3