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Borrowing Arrangements (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 28, 2024
Mar. 31, 2024
Sep. 30, 2021
Mar. 31, 2024
Mar. 31, 2023
Sep. 30, 2023
May 28, 2021
Long-term Debt, Gross   $ 452.3   $ 452.3   $ 451.3  
Outstanding letter of credit accrued fees and expenses   0.2   0.2      
Future maturities of outstanding borrowings              
Payments of debt issuance costs   0.8          
Payments of financing costs       0.8 $ 0.0    
Outstanding letters of credit   12.2   12.2      
Domestic Line of Credit [Member]              
Revolving credit facility amount   $ (175.0)   (175.0)      
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.375%          
Future maturities of outstanding borrowings              
Line of Credit Facility, Maximum Borrowing Capacity   $ 175.0   175.0      
Potential increase size of the credit facility by an additional amount       $ 150.0      
Debt Instrument, Threshold for Unused Commitment Fee, Percentage of Aggregate Revolving Commitments 50.00%            
Line of Credit Facility, Borrowing Base, Percentage of Eligible Accounts Receivable   85.00%   85.00%      
Line of Credit Facility, Borrowing Base, Percentage of Eligible Inventory   70.00%   70.00%      
Line of Credit Facility, Borrowing Base, Percentage of Net Orderly Liquidation Value of Eligible Inventory   85.00%   85.00%      
Line of Credit Facility, Covenant, Percent of Loan Cap   10.00%   10.00%      
Unsecured Debt [Member]              
Long-term Debt, Gross             $ 450.0
Debt Instrument, Interest Rate, Stated Percentage   4.00%   4.00%      
Future maturities of outstanding borrowings              
Payments of debt issuance costs     $ 5.5        
Financial Liabilities Fair Value Disclosure   $ 407.7   $ 407.7      
Debt Instrument, Redemption Price, Percentage       40.00%      
Debt Instrument, Redemption Price Upon Change In Control, Percentage       101.00%      
Swing Line Loans [Member]              
Revolving credit facility amount   (25.0)   $ (25.0)      
Future maturities of outstanding borrowings              
Line of Credit Facility, Maximum Borrowing Capacity   25.0   25.0      
Letters Of Credit Outstanding [Member]              
Revolving credit facility amount   (60.0)   (60.0)      
Future maturities of outstanding borrowings              
Line of Credit Facility, Maximum Borrowing Capacity   60.0   60.0      
Revolving Credit Facility              
Excess availability reduced by outstanding borrowings, outstanding letters of credit and accrued fees and expenses   162.6   162.6      
Future maturities of outstanding borrowings              
Aggregate commitments availability       17.5      
Line of Credit Facility, Remaining Borrowing Capacity   162.6   162.6      
Revolving Credit Facility, ABL Waiver, Through February 2024              
Excess availability reduced by outstanding borrowings, outstanding letters of credit and accrued fees and expenses   50.0   50.0      
Future maturities of outstanding borrowings              
Line of Credit Facility, Remaining Borrowing Capacity   $ 50.0   $ 50.0      
Minimum [Member] | Domestic Line of Credit [Member]              
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.25%          
Maximum [Member] | Domestic Line of Credit [Member]              
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage   0.375%          
Base Rate [Member] | Domestic Line of Credit [Member]              
Line of Credit Facility, Interest Rate at Period End   0.50%   0.50%      
Future maturities of outstanding borrowings              
Debt Instrument, Threshold for Variable Rate, Percentage of Aggregate Revolving Commitments 50.00%            
Base Rate [Member] | Minimum [Member] | Domestic Line of Credit [Member]              
Debt Instrument, Basis Spread on Variable Rate 0.50%            
Base Rate [Member] | Maximum [Member] | Domestic Line of Credit [Member]              
Debt Instrument, Basis Spread on Variable Rate 0.75%            
Secured Overnight Financing Rate | Domestic Line of Credit [Member]              
Debt Instrument, Basis Spread on Variable Rate   0.10%          
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Domestic Line of Credit [Member]              
Line of Credit Facility, Interest Rate at Period End   1.50%   1.50%      
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Minimum [Member] | Domestic Line of Credit [Member]              
Debt Instrument, Basis Spread on Variable Rate 1.50%            
Future maturities of outstanding borrowings              
Debt Instrument, Decrease to Basis Spread on Variable Rate 0.50%            
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Maximum [Member] | Domestic Line of Credit [Member]              
Debt Instrument, Basis Spread on Variable Rate 1.75%