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SEGMENT INFORMATION - Narrative (Details)
12 Months Ended
Sep. 30, 2025
employee
segment
Sep. 30, 2024
Sep. 30, 2023
Segment Reporting Information [Line Items]      
Number of operating segments | segment 2    
Employees represented by a union under a collective bargaining agreement (approximately) (%) 20.00%    
Number of employees represented by a union under a collective bargaining agreement | employee 1,105    
Labor contract term 5 years    
Accounts Receivable Benchmark | Customer Concentration Risk | Sonepar USA      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 13.00% 17.00%  
Accounts Receivable Benchmark | Customer Concentration Risk | CED National      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 12.00% 11.00%  
Sales Benchmark | Customer Concentration Risk | Sonepar USA      
Segment Reporting Information [Line Items]      
Concentration risk, percentage 10.00% 10.00% 10.00%