Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details)

v2.4.0.8
Fair Value Measurements (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Jul. 09, 2010
Liabilities:      
Stated interest rate (as a percent) 5.50%    
$150 senior unsecured notes
     
Liabilities:      
Long-term debt, principal $ 150.0 $ 150.0 $ 150.0
Term of debt issued 10 years    
Stated interest rate (as a percent) 5.50%   5.50%
Carrying Value
     
Assets:      
Cash and cash equivalents 42.7 20.2  
Equity investments 1.0 2.5  
Investments in rabbi trust 5.6 5.5  
Derivative instruments 1.5    
Carrying amount of private equity limited partnerships for which fair value is not readily available 10.3 13.3  
Fair value of warrants to purchase common stock (1.0)    
Fair value of common stock   1.5  
Liabilities:      
$150 senior unsecured notes 148.8 148.6  
Revolving credit facilities 325.5 123.0  
Term loan 190.0    
Derivative instruments 0.5 0.4  
Level 1
     
Assets:      
Cash and cash equivalents 42.7 20.2  
Equity investments   1.5  
Investments in rabbi trust 5.6 5.5  
Liabilities:      
$150 senior unsecured notes 155.3 165.6  
Level 2
     
Assets:      
Derivative instruments 1.5    
Liabilities:      
Revolving credit facilities 325.5 123.0  
Term loan 190.0    
Derivative instruments 0.5 0.4  
Level 3
     
Assets:      
Equity investments $ 5.0 $ 1.0