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Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($)
$ in Millions
Apr. 30, 2018
Oct. 31, 2017
Debt Instrument [Line Items]    
Long-term debt $ 1,041.0 $ 959.2
Less current portion 15.0 15.0
Less deferred financing costs 5.5 6.4
Long-term debt 1,020.5 937.8
2017 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 396.2  
Senior Notes due 2019    
Debt Instrument [Line Items]    
Less deferred financing costs 0.6  
Senior Notes due 2019 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 248.5 248.0
Senior Notes due 2021 | Senior Notes    
Debt Instrument [Line Items]    
Long-term debt 240.9 230.9
Other debt    
Debt Instrument [Line Items]    
Long-term debt 5.4 6.5
Term Loan | 2017 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 281.3 288.8
Domestic Line of Credit | Receivables Facility    
Debt Instrument [Line Items]    
Long-term debt 150.0 150.0
Revolving Credit Facility | 2017 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 114.9 $ 35.0
Less current portion 15.0  
Less deferred financing costs 4.9  
Long-term debt $ 381.2