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Defined Benefit Plans
 6 Months Ended
Mar. 31, 2014
Compensation and Retirement Disclosure [Abstract]  
Defined Benefit Plans
Defined Benefit Plans
The components of consolidated net periodic benefit and deferred compensation benefit costs and contributions made are as follows:
 
Three months ended
 
Six months ended
 
March 31, 2014
 
March 31, 2013
 
March 31, 2014
 
March 31, 2013
Service cost
$
0.8

 
$
0.9

 
$
2.0

 
$
1.7

Interest cost
2.6

 
2.7

 
6.0

 
5.3

Expected return on assets
(2.4
)
 
(2.4
)
 
(6.0
)
 
(4.9
)
Recognized net actuarial loss
0.4

 
0.6

 
0.8

 
1.1

Employee contributions
—

 
(0.1
)
 
—

 
(0.1
)
   Net periodic benefit expense
$
1.4

 
$
1.7

 
$
2.8

 
$
3.1

Contributions made during period
$
2.2

 
$
1.2

 
$
5.6

 
$
1.9