v3.26.1
Long-Term Debt - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jan. 29, 2025
Aug. 28, 2023
Dec. 18, 2013
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Sep. 30, 2025
Jun. 27, 2024
Debt Instrument [Line Items]                  
Loss on debt extinguishment         $ (0.7) [1] $ 0.0 $ (0.7) [1]    
Debt voluntary repayment           13.0 16.0    
Debt borrowings during the period           45.1 11.6    
Long-term debt, fair value       $ 830.8   830.8   $ 796.8  
Receivables Financing Agreement | Wholly-owned Subsidiary                  
Debt Instrument [Line Items]                  
Credit agreement, maximum borrowing capacity                 $ 325.0
Weighted average interest rate                 $ 50.0
Interest period term       90.2   90.2   82.3  
Debt voluntary repayment           13.0 16.0    
Debt borrowings during the period           45.1 11.6    
SOFR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate 0.50%                
ABR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate 1.50%                
Series B Term Loan                  
Debt Instrument [Line Items]                  
Debt repayments       0.0 0.0 0.0 0.0    
Credit Agreement | First Lien Credit Facility Term Loans                  
Debt Instrument [Line Items]                  
Credit agreement date     Dec. 18, 2013            
Debt instrument, term     7 years            
Credit agreement, maximum borrowing capacity     $ 1,460.0            
Credit Agreement | First Lien Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt instrument, term     5 years            
Credit agreement, maximum borrowing capacity     $ 210.0            
Amended Credit Agreement                  
Debt Instrument [Line Items]                  
Debt borrowings during the period   $ 450.0              
Amended Credit Agreement | SOFR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate 2.00%                
Amended Credit Agreement | ABR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate 1.00%                
Amended Credit Agreement | First Lien Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt instrument, term     5 years            
Credit agreement, maximum borrowing capacity     $ 300.0            
Amended Credit Agreement | Series B Term Loan                  
Debt Instrument [Line Items]                  
Debt instrument, term     7 years            
Credit agreement, maximum borrowing capacity     $ 1,200.0            
Debt instrument, original discount     $ 12.0            
Debt instrument, maturity date     Apr. 22, 2029            
Debt instrument, effective interest rate     3.42%            
Previous Revolving Credit Facility | First Lien Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Interest period term       0.0   $ 0.0   $ 0.0  
Revolving Credit Facility | SOFR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate           0.00%      
Revolving Credit Facility | ABR                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate           1.00%      
Revolving Credit Facility | ABR | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate           1.50%      
Revolving Credit Facility | ABR | Minimum                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate           1.00%      
Revolving Credit Facility | First Lien Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Debt repayments       $ 0.0 $ 0.0 $ 0.0 $ 0.0    
Debt instrument, maturity date           Apr. 22, 2027      
Revolving Credit Facility | First Lien Revolving Credit Facility | LIBOR | Maximum                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate           2.50%      
Revolving Credit Facility | First Lien Revolving Credit Facility | LIBOR | Minimum                  
Debt Instrument [Line Items]                  
Debt instrument, basis spread on variable rate           2.00%      
[1] Represents losses on the extinguishment of debt related to Amendment No. 9 to the Credit Agreement, in the fiscal year ended September 30, 2025 and includes accelerated amortization of deferred financing fees and original issue discount as well as fees paid to lenders and third parties.