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LONG-TERM DEBT - Summary of Long-Term Debt (Details) - USD ($)
$ in Millions
Apr. 30, 2020
Oct. 31, 2019
Debt Instrument [Line Items]    
Long-term debt $ 2,691.2 $ 2,756.3
Less: current portion 83.8 83.7
Less: deferred financing costs 12.3 13.6
Long-term debt 2,595.1 2,659.0
2019 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 1,644.0  
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 1,570.3 1,612.2
Domestic Line of Credit    
Debt Instrument [Line Items]    
Long-term debt 336.2 351.6
Revolving Credit Facility | 2019 Credit Agreement    
Debt Instrument [Line Items]    
Long-term debt 73.7 76.1
Less: current portion 83.8  
Long-term debt 1,560.2  
Senior Notes | Senior Notes due 2027    
Debt Instrument [Line Items]    
Long-term debt 494.7 494.3
Senior Notes | Senior Notes due 2021    
Debt Instrument [Line Items]    
Long-term debt $ 216.1 $ 221.7