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Long-Term Debt - Summary of Long-Term Debt (Detail) - USD ($)
$ in Millions
Oct. 31, 2017
Oct. 31, 2016
Debt Instrument [Line Items]    
Other debt $ 6.5 $ 9.7
Long-term debt 959.2 974.6
Less current portion (15.0) 0.0
Less deferred financing costs 6.4 0.0
Long-term debt 937.8 974.6
2017 Credit Agreement    
Debt Instrument [Line Items]    
Credit agreement 323.8 0.0
Prior Credit Agreement    
Debt Instrument [Line Items]    
Credit agreement 0.0 201.2
Senior Notes due 2017    
Debt Instrument [Line Items]    
Senior notes 0.0 300.1
Senior Notes due 2019    
Debt Instrument [Line Items]    
Senior notes 248.0 247.0
Less deferred financing costs 0.8  
Senior Notes due 2021    
Debt Instrument [Line Items]    
Senior notes 230.9 216.6
Receivables Facility    
Debt Instrument [Line Items]    
Carrying amount of long-term debt $ 150.0 $ 0.0