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Inventories (Tables)
6 Months Ended
Dec. 31, 2014
Inventory, Net [Abstract]  
Schedule of inventories
Inventories consisted of the following components as of December 31, 2014 and June 30, 2014:
 
($ in millions)
 
December 31,
2014
 
June 30,
2014
Raw materials and supplies
 
$
140.8

 
$
122.3

Work in process
 
414.6

 
393.9

Finished and purchased products
 
201.7

 
183.0

Total inventory
 
$
757.1

 
$
699.2