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DEBT - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Oct. 19, 2023
Mar. 31, 2024
Apr. 02, 2023
Mar. 31, 2024
Apr. 02, 2023
Sep. 30, 2023
Debt Instrument [Line Items]            
Stated interest rate   5.30%   5.30%   5.30%
Gain from debt repurchase   $ 0 $ 0 $ 4,700,000 $ 0  
5.00% Notes, due October 1, 2029            
Debt Instrument [Line Items]            
Stated interest rate   5.00%   5.00%   5.00%
5.50% Notes, due July 15, 2030            
Debt Instrument [Line Items]            
Stated interest rate   5.50%   5.50%   5.50%
Senior Notes            
Debt Instrument [Line Items]            
Extinguishment of debt       $ 180,100,000    
Gain from debt repurchase       4,700,000    
Senior Notes | 5.00% Notes, due October 1, 2029            
Debt Instrument [Line Items]            
Extinguishment of debt       $ 8,100,000    
Stated interest rate   5.00%   5.00%    
Senior Notes | 5.50% Notes, due July 15, 2030            
Debt Instrument [Line Items]            
Extinguishment of debt       $ 132,800,000    
Stated interest rate   5.50%   5.50%    
Senior Notes | Notes 3.875% Due March 15, 2031            
Debt Instrument [Line Items]            
Extinguishment of debt       $ 39,200,000    
Stated interest rate   3.875%   3.875%    
Revolving Credit Facility | Line of Credit            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 500,000,000          
Line of credit facility, unused capacity, commitment fee percentage 0.20%          
Line of credit facility, unused capacity, commitment fee percentage, maximum 0.40%          
Offering fees       $ 4,000,000    
Debt issuance costs   $ 3,200,000   3,200,000    
Remaining borrowing capacity   490,300,000   490,300,000    
Revolving Credit Facility | Line of Credit | Minimum | SOFR            
Debt Instrument [Line Items]            
Percentage over base variable rate 1.00%          
Revolving Credit Facility | Line of Credit | Minimum | Alternate Base Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 0.00%          
Revolving Credit Facility | Line of Credit | Minimum | EURIBOR Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 1.00%          
Revolving Credit Facility | Line of Credit | Minimum | CORRA Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 1.00%          
Revolving Credit Facility | Line of Credit | Minimum | Canadian Prime Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 0.00%          
Revolving Credit Facility | Line of Credit | Minimum | SONIA Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 1.00%          
Revolving Credit Facility | Line of Credit | Maximum | SOFR            
Debt Instrument [Line Items]            
Percentage over base variable rate 2.00%          
Revolving Credit Facility | Line of Credit | Maximum | Alternate Base Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 1.00%          
Revolving Credit Facility | Line of Credit | Maximum | EURIBOR Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 2.00%          
Revolving Credit Facility | Line of Credit | Maximum | CORRA Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 2.00%          
Revolving Credit Facility | Line of Credit | Maximum | Canadian Prime Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 1.00%          
Revolving Credit Facility | Line of Credit | Maximum | SONIA Rate            
Debt Instrument [Line Items]            
Percentage over base variable rate 2.00%          
Revolving Credit Facility | Line of Credit | U.S. Plans            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 400,000,000          
Revolving Credit Facility | Line of Credit | Non-US            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 100,000,000          
Letter of Credit | Line of Credit            
Debt Instrument [Line Items]            
Long-term debt   $ 9,700,000   $ 9,700,000