Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Schedule of borrowings (Details)

v3.7.0.1
Financing Agreements - Schedule of borrowings (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2017
Mar. 31, 2016
Sep. 30, 2016
Dec. 15, 2014
Financing Agreements            
Total debt $ 622.6   $ 622.6   $ 608.9  
Less: current portion (16.2)   (16.2)   (13.8)  
Long-term debt 606.4   606.4   595.1  
$700 revolving credit facility (excluding outstanding letters of credit)            
Financing Agreements            
Long-term Debt, Gross $ 218.5   $ 218.5   198.5  
Debt Instrument, Interest Rate During Period 1.44% 1.46% 1.42% 1.35%    
Term loan            
Financing Agreements            
Long-term Debt, Gross $ 155.3   $ 155.3   162.0  
Debt Instrument, Interest Rate During Period 2.16% 1.76% 2.05% 1.61%    
$150 senior unsecured notes, net of discount (1)            
Financing Agreements            
Long-term Debt, Gross $ 149.4   $ 149.4      
Total debt 148.7   148.7   148.5  
$100 Series A Notes (2)            
Financing Agreements            
Long-term Debt, Gross 100.0   100.0      
Total debt 99.6   99.6   99.6  
Stated interest rate           4.60%
Borrowings [Member]            
Financing Agreements            
Total debt $ 0.5   $ 0.5   $ 0.3