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Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($)
$ in Millions
Apr. 30, 2017
Oct. 31, 2016
Debt Instrument [Line Items]    
Long-term debt $ 1,056.2 $ 974.6
Less current portion 15.0 0.0
Less deferred financing costs 7.6 0.0
Long-term debt 1,033.6 974.6
Prior Credit Agreement | Line of Credit    
Debt Instrument [Line Items]    
Long-term debt 0.0 201.2
Senior Notes due 2017 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 0.0 300.1
Senior Notes due 2019    
Debt Instrument [Line Items]    
Less deferred financing costs 1.1  
Senior Notes due 2019 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 247.5 247.0
Senior Notes due 2021    
Debt Instrument [Line Items]    
Less deferred financing costs 0.2  
Senior Notes due 2021 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 216.7 216.6
Other debt    
Debt Instrument [Line Items]    
Long-term debt 8.1 9.7
Revolving Credit Facility | 2017 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 433.9 0.0
Less current portion 15.0  
Less deferred financing costs 6.3  
Long-term debt 418.9  
Domestic Line of Credit | Receivables Facility    
Debt Instrument [Line Items]    
Long-term debt $ 150.0 $ 0.0