Quarterly report pursuant to Section 13 or 15(d)

Financing Agreements - Schedule of borrowings (Details)

v3.8.0.1
Financing Agreements - Schedule of borrowings (Details)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2017
Mar. 31, 2018
USD ($)
Mar. 31, 2017
Sep. 30, 2017
USD ($)
Dec. 15, 2014
Financing Agreements            
Total debt $ 479.1   $ 479.1   $ 465.7  
Less: current portion (0.7)   (0.7)   (18.8)  
Long-term debt 478.4   $ 478.4   446.9  
Debt Instrument, Covenant Terms, Maximum Ratio of Indebtedness to Earnings before Interest, Taxes, Depreciation, and Amortization     3.5      
$900 revolving credit facility (excluding outstanding letters of credit)            
Financing Agreements            
Long-term Debt, Gross $ 229.7   $ 229.7   68.0  
Debt Instrument, Interest Rate During Period 2.03% 1.44% 1.82% 1.42%    
Total debt $ 229.7   $ 229.7      
Term loan            
Financing Agreements            
Long-term Debt, Gross $ 0.0   0.0   148.5  
Debt Instrument, Interest Rate During Period 2.60% 2.16%   2.05%    
$150 senior unsecured notes, net of discount (1)            
Financing Agreements            
Debt Issuance Costs, Net $ 0.5   0.5   0.6  
Long-term Debt, Gross 149.6   149.6      
Total debt 149.1   149.1   148.9  
$100 Series A Notes (2)            
Financing Agreements            
Debt Issuance Costs, Net 0.4   0.4   0.3  
Long-term Debt, Gross 100.0   100.0      
Total debt 99.6   99.6   99.7  
Stated interest rate           4.60%
Borrowings [Member]            
Financing Agreements            
Total debt $ 0.7   $ 0.7   $ 0.6