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Inventories (Tables)
12 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of inventories
Inventories consisted of the following components at June 30, 2020 and 2019:
    
 
 
June 30,
($ in millions)
 
2020
 
2019
Raw materials and supplies
 
$
217.6

 
$
169.8

Work in process
 
312.3

 
425.7

Finished and purchased products
 
194.4

 
192.2

Total inventory
 
$
724.3

 
$
787.7