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Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($)
$ in Millions
Jul. 31, 2017
Oct. 31, 2016
Debt Instrument [Line Items]    
Long-term debt $ 1,056.9 $ 974.6
Less current portion 16.3 0.0
Less deferred financing costs 6.9 0.0
Long-term debt 1,033.7 974.6
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 0.9  
Senior Notes due 2019 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 247.7 247.0
Senior Notes due 2021 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 232.1 216.6
Other debt    
Debt Instrument [Line Items]    
Long-term debt 8.2 9.7
Revolving Credit Facility | 2017 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 418.9 0.0
Less current portion 15.0  
Less deferred financing costs 6.0  
Long-term debt 403.9  
Domestic Line of Credit | Receivables Facility    
Debt Instrument [Line Items]    
Long-term debt $ 150.0 $ 0.0