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LONG-TERM DEBT - Summary of Long-Term Debt (Details) - USD ($)
$ in Millions
Jul. 31, 2020
Oct. 31, 2019
Debt Instrument [Line Items]    
Long-term debt $ 2,646.6 $ 2,756.3
Less: current portion 99.7 83.7
Less: deferred financing costs 11.6 13.6
Long-term debt 2,535.3 2,659.0
2019 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 1,614.8  
Other debt    
Debt Instrument [Line Items]    
Long-term debt 0.2 0.4
Term Loan | 2019 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 1,549.4 1,612.2
Domestic Line of Credit    
Debt Instrument [Line Items]    
Long-term debt 301.2 351.6
Revolving Credit Facility | 2019 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 65.4 76.1
Less: current portion 99.7  
Long-term debt 1,515.1  
Senior Notes | Senior Notes due 2027    
Debt Instrument [Line Items]    
Long-term debt 494.9 494.3
Senior Notes | Senior Notes due 2021    
Debt Instrument [Line Items]    
Long-term debt $ 235.5 $ 221.7