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Accrued Liabilities
3 Months Ended
Sep. 30, 2016
Accrued Liabilities, Current [Abstract]  
Accrued Liabilities
Accrued Liabilities
 
Accrued liabilities consisted of the following as of September 30, 2016 and June 30, 2016:
 
($ in millions)
 
September 30,
2016
 
June 30,
2016
Accrued compensation and benefits
 
$
36.2

 
$
41.8

Derivative financial instruments
 
20.0

 
31.6

Accrued postretirement benefits
 
13.7

 
13.8

Deferred revenue
 
8.9

 
8.9

Accrued interest expense
 
5.6

 
11.2

Accrued pension liabilities
 
4.1

 
10.1

Accrued income taxes
 
0.8

 
1.5

Other
 
21.5

 
20.3

Total accrued liabilities
 
$
110.8

 
$
139.2