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Retirement Plans (Tables)
9 Months Ended
Jun. 30, 2014
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]  
Schedule of Net Periodic Benefit Cost
The components of net periodic benefit cost allocated to continuing operations for defined benefit pension plans are as follows.
 
Three months ended
 
Nine months ended
 
June 30,
 
June 30,
 
2014
 
2013
 
2014
 
2013
 
(in millions)
Service cost
$
0.4

 
$
0.5

 
$
1.2

 
$
1.5

Interest cost
5.0

 
1.6

 
15.0

 
4.8

Expected return on plan assets
(6.0
)
 
(2.2
)
 
(17.9
)
 
(6.5
)
Amortization of actuarial net loss
0.9

 
0.8

 
2.7

 
2.3

Net periodic benefit cost
$
0.3

 
$
0.7

 
$
1.0

 
$
2.1