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Restructuring Charges (Tables)
 3 Months Ended
Sep. 30, 2015
Restructuring and Related Activities [Abstract]  
Schedule of activity and reserve balances for restructuring
Activity and reserve balances for restructuring charges at September 30, 2015 were as follows:

($ in millions)
 
Reserve Balance
Reserve balance at June 30, 2015
 
$
2.3

Cash payments
 
(0.9
)
Restructuring charges
 
0.4

Other
 
(0.4
)
Reserve balance at September 30, 2015
 
$
1.4