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DEBT - Senior Notes (Details)
Jun. 17, 2024
May 23, 2024
USD ($)
day
$ / shares
May 20, 2024
USD ($)
Mar. 03, 2021
USD ($)
Jun. 30, 2020
USD ($)
Sep. 24, 2019
USD ($)
Sep. 20, 2016
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
Sep. 20, 2016
EUR (€)
Debt Instrument [Line Items]                    
Amount   $ 50,000,000 $ 50,000,000              
Convertible Debt                    
Debt Instrument [Line Items]                    
Redemption price percentage 100.667%                  
3.375% Exchangeable Notes, due June 1, 2029                    
Debt Instrument [Line Items]                    
Stated interest rate   3.375%           3.375%    
3.375% Exchangeable Notes, due June 1, 2029 | Convertible Debt                    
Debt Instrument [Line Items]                    
Stated interest rate   3.375%                
Aggregate borrowing amount   $ 350,000,000                
Payments for premium on equity component of convertible debt   $ 25,200,000                
Threshold percentage of stock price trigger   130.00%                
Threshold trading days | day   20                
Threshold consecutive trading days | day   30                
Convertible, conversion price (in dollars per share) | $ / shares   $ 121.86                
Scheduled trading day | day   41                
Redemption price percentage   100.00%                
Unamortized debt issuance costs   $ 11,800,000           $ 11,100,000    
3.375% Exchangeable Notes, due June 1, 2029 | Convertible Debt | Debt Instrument, Conversion Terms, Scenario One                    
Debt Instrument [Line Items]                    
Threshold percentage of stock price trigger   130.00%                
Threshold trading days | day   20                
Threshold consecutive trading days | day   30                
3.375% Exchangeable Notes, due June 1, 2029 | Convertible Debt | Debt Instrument, Conversion Terms, Scenario Two                    
Debt Instrument [Line Items]                    
Threshold percentage of stock price trigger   98.00%                
Threshold trading days | day   5                
Threshold consecutive trading days | day   10                
3.375% Exchangeable Notes, due June 1, 2029 | Convertible Debt | Debt Instrument, Conversion Terms, Scenario Three                    
Debt Instrument [Line Items]                    
Threshold consecutive trading days | day   10                
3.375% Exchangeable Notes, due June 1, 2029 | Senior Notes                    
Debt Instrument [Line Items]                    
Conversion ratio   0.008206                
4.00% Notes, due October 1, 2026                    
Debt Instrument [Line Items]                    
Stated interest rate               4.00% 4.00% 4.00%
Aggregate borrowing amount | €                   € 425,000,000
Capitalized debt issuance costs             $ 7,700,000      
5.00% Notes, due October 1, 2029                    
Debt Instrument [Line Items]                    
Stated interest rate           5.00%   5.00% 5.00%  
Aggregate borrowing amount           $ 300,000,000        
Unamortized debt issuance costs               $ 100,000    
Capitalized debt issuance costs           $ 4,100,000        
Minimum percentage of aggregate outstanding principal amount to declare acceleration of debt in case of default           25.00%        
5.50% Notes, due July 15, 2030                    
Debt Instrument [Line Items]                    
Stated interest rate               5.50% 5.50%  
Minimum percentage of aggregate outstanding principal amount to declare acceleration of debt in case of default         25.00%          
5.50% Notes, due July 15, 2030 | Senior Notes                    
Debt Instrument [Line Items]                    
Stated interest rate         5.50%          
Aggregate borrowing amount         $ 300,000,000          
Unamortized debt issuance costs         $ 6,200,000     $ 200,000    
5.50% Notes, due July 15, 2030 | Senior Notes | Prior to July 15, 2025                    
Debt Instrument [Line Items]                    
Redemption price percentage         100.00%          
5.50% Notes, due July 15, 2030 | Senior Notes | Before July, 2023                    
Debt Instrument [Line Items]                    
Redemption price, percentage of principal amount redeemed         35.00%          
3.875% Notes, due March 15, 2031                    
Debt Instrument [Line Items]                    
Stated interest rate               3.875% 3.90%  
Minimum percentage of aggregate outstanding principal amount to declare acceleration of debt in case of default       25.00%            
3.875% Notes, due March 15, 2031 | Senior Notes                    
Debt Instrument [Line Items]                    
Stated interest rate       3.875%            
Aggregate borrowing amount       $ 500,000,000            
Unamortized debt issuance costs       $ 7,600,000       $ 1,300,000    
3.875% Notes, due March 15, 2031 | Senior Notes | Prior to July 15, 2025                    
Debt Instrument [Line Items]                    
Redemption price percentage       100.00%            
3.875% Notes, due March 15, 2031 | Senior Notes | Before July, 2023                    
Debt Instrument [Line Items]                    
Redemption price percentage       35.00%