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Restructuring Charges and Asset Impairment Charges (Tables)
 12 Months Ended
Jun. 30, 2016
Restructuring and Related Activities [Abstract]  
Schedule of activity and reserve balances for restructuring
Activity and reserve balances for restructuring charges at June 30, 2016 and 2015 were as follows:

 
 
June 30,
($ in millions)
 
2016
 
2015
Reserve balance beginning of year
 
$
2.3

 
$
—

Restructuring charges and asset impairment charges
 
18.0

 
29.1

Cash payments
 
(3.0
)
 
(10.9
)
Payments from qualified pension plan associated with restructuring charges
 
(9.4
)
 
(8.3
)
Non-cash asset impairment charges and other
 
(7.6
)
 
(7.6
)
Reserve balance end of year
 
$
0.3

 
$
2.3