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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Additional Information (Details)
shares in Millions, $ in Millions
 6 Months Ended 12 Months Ended
Sep. 04, 2024
shares
Jun. 28, 2025
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
USD ($)
Mar. 14, 2025
USD ($)
Sep. 01, 2024
USD ($)
Oct. 27, 2023
USD ($)
Significant Accounting Policies [Line Items]                
Percentage of annual net sales from combined second and third quarter sales   75.00%            
Liabilities     $ 3,099.5 $ 3,262.5        
Investment in unconsolidated affiliates     53.6 45.2        
Other assets     470.8 574.1        
Number of restricted shares issued (in shares) | shares 0.3              
Deferred advertising costs     0.0 20.0        
Advertising expenses     152.3 141.0 $ 123.7      
Research and development charge     34.8 34.6 35.7      
Product registration costs     8.9 9.0 12.4      
Accounts Receivable, Held-for-Sale             $ 750.0 $ 600.0
Derecognition of net receivables     163.3 186.6        
Proceeds from sale of net receivables     1,906.1 1,938.6        
Total discount recorded on sale     20.7 24.6        
Interest capitalized on capital projects     1.1 1.1 2.1      
Noncash investing activities for unpaid liabilities incurred     $ 8.4 $ 16.3 32.1      
Supplier Finance Program, Obligation, Statement of Financial Position [Extensible Enumeration]     Accounts Payable, Current Accounts Payable, Current        
Recognition of accumulated foreign currency translation (gain) loss     $ (0.5) $ (0.4) 1.3      
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]     Other Liabilities, Current Other Liabilities, Current        
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]     Other Liabilities, Noncurrent Other Liabilities, Noncurrent        
Other investing, net     $ (3.7) $ 5.0 (9.9)      
Investments in unconsolidated affiliates     0.0 (21.4) 0.0      
Proceeds from loans receivable     0.0 0.0 37.0      
Tax withholding     $ 18.4 $ 5.1 $ 9.3      
Standby Letters of Credit                
Significant Accounting Policies [Line Items]                
Maximum borrowing capacity               $ 75.0
Performance-Based Units                
Significant Accounting Policies [Line Items]                
Award vesting period (in years)     3 years          
Officer | Options                
Significant Accounting Policies [Line Items]                
Expiration period (in years)     10 years          
Director                
Significant Accounting Policies [Line Items]                
Award vesting period (in years)     1 year          
Minimum                
Significant Accounting Policies [Line Items]                
Award vesting period (in years)     3 years          
Expected forfeiture rate     15.00%          
Intangible assets amortization period     3 years          
Payment timing, period     30 days          
Minimum | Software                
Significant Accounting Policies [Line Items]                
Intangible assets amortization period     3 years          
Minimum | Officer | Performance-Based Units                
Significant Accounting Policies [Line Items]                
Vesting percent of target award     0.00%          
Maximum                
Significant Accounting Policies [Line Items]                
Intangible assets amortization period     25 years          
Payment timing, period     60 days          
Maximum | Software                
Significant Accounting Policies [Line Items]                
Intangible assets amortization period     8 years          
Maximum | Officer | Performance-Based Units                
Significant Accounting Policies [Line Items]                
Vesting percent of target award     325.00%          
Variable Interest Entity, Primary Beneficiary                
Significant Accounting Policies [Line Items]                
Liabilities     $ 39.0     $ 39.0    
Investments sold, book value           $ 39.0    
Percentage of appreciation of fair value           0.05    
Investment in unconsolidated affiliates     2.6          
Other assets     $ 24.6