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Retirement and Postretirement Plans (Tables)
6 Months Ended
Mar. 31, 2015
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Components of Net Pension Expense
  Quarter Ended March 31  
Year to Date Ended March 31
 
  2015 2014  
2015
   
2014
 
Service cost
$ 1.3

$ 1.3   $ 2.7     $ 2.5  
Interest cost
3.7 3.6     7.4       7.2  
Expected return on plan assets
(4.2 ) (4.2   (8.5 )     (8.4 )
Amortization of unrecognized prior service cost, net
0.2 0.1     0.3       0.3  
Amortization of net loss
1.3
0.8     2.7       1.6  
Net pension expense 
  2.3       1.6     4.6       3.2  
Special termination benefits 
  -       2.4     -       2.4  
Net pension expense
$ 2.3 $ 4.0   $ 4.6     $ 5.6