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FAIR VALUE, Level 3 Financial Assets and Liabilities, Narrative (Details)
Jun. 30, 2026
Sep. 30, 2025
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Instruments measured at fair value, percentage of assets 9.00% 10.00%
Instruments measured at fair value, percentage of liabilities 2.00% 2.00%
Instruments measured at fair value, Level 3, percentage of assets (less than) 1.00%  
Instruments measured at fair value, Level 3, percentage of liabilities (less than) 12.00% 1.00%
Discount rate    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Contingent consideration, measurement input 0.15