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LONG-TERM DEBT - Credit Agreement (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2023
Jul. 31, 2020
Apr. 30, 2019
USD ($)
Apr. 30, 2018
USD ($)
Apr. 30, 2019
USD ($)
Apr. 30, 2018
USD ($)
Oct. 31, 2018
USD ($)
Feb. 11, 2019
USD ($)
Debt Instrument [Line Items]                
Long-term debt     $ 2,950,400,000   $ 2,950,400,000   $ 907,600,000  
Current portion of long-term debt     83,800,000   83,800,000   18,800,000  
Long-term debt, excluding current maturities     2,851,800,000   2,851,800,000   884,100,000  
Debt extinguishment charges     21,900,000 $ 0 21,900,000 $ 0    
2019 Credit Agreement                
Debt Instrument [Line Items]                
Long-term debt     1,974,100,000   1,974,100,000      
Secured Term Loan A-1 Facility                
Debt Instrument [Line Items]                
Debt issued               $ 1,275,000,000.0
Secured Term Loan A-2 Facility                
Debt Instrument [Line Items]                
Debt issued               400,000,000.0
Senior Notes due 2027                
Debt Instrument [Line Items]                
Debt issued               700,000,000.0
Revolving Credit Facility | 2017 Credit Agreement                
Debt Instrument [Line Items]                
Maximum borrowing capacity               800,000,000.0
Long-term debt     0   0   3,800,000  
Debt extinguishment charges     800,000          
Revolving Credit Facility | 2019 Credit Agreement                
Debt Instrument [Line Items]                
Maximum borrowing capacity               800,000,000.0
Long-term debt     320,000,000   320,000,000   $ 0  
Current portion of long-term debt     83,800,000   83,800,000      
Long-term debt, excluding current maturities     $ 1,890,300,000   $ 1,890,300,000      
Weighted average interest rate     4.10%   4.10%      
Actual interest rate     4.22%   4.22%      
Debt issuance costs     $ 8,900,000   $ 8,900,000      
Debt extinguishment charges     5,400,000          
Revolving Credit Facility | Multicurrency Facility                
Debt Instrument [Line Items]                
Maximum borrowing capacity               600,000,000.0
Revolving Credit Facility | U.S. Dollar Facility                
Debt Instrument [Line Items]                
Maximum borrowing capacity               $ 200,000,000.0
Term Loan | 2019 Credit Agreement                
Debt Instrument [Line Items]                
Debt issuance costs     $ 12,000,000   $ 12,000,000      
Minimum                
Debt Instrument [Line Items]                
Debt instrument covenant EBITDA             4.75  
Maximum                
Debt Instrument [Line Items]                
Interest coverage ratio, adjusted EBITDA             3.00  
Scenario, Forecast                
Debt Instrument [Line Items]                
Debt Instrument Covenant EBITDA, ratio step down   0.25            
Scenario, Forecast | Minimum                
Debt Instrument [Line Items]                
Debt instrument covenant EBITDA 4.00