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EMPLOYEE BENEFIT PLANS - Schedule of Actual and weighted-average assets allocation for qualified benefit plans (Details)
Sep. 30, 2025
Sep. 30, 2024
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, total actual weighted average plan asset allocations 100.00% 100.00%
Target plan asset allocations 100.00%  
Cash and equivalents    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, total actual weighted average plan asset allocations 2.40% 2.90%
Target plan asset allocations 0.00%  
Equity securities    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, total actual weighted average plan asset allocations 5.40% 26.40%
Target plan asset allocations 5.00%  
Fixed income    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, total actual weighted average plan asset allocations 80.00% 48.60%
Target plan asset allocations 85.00%  
Other    
Defined Benefit Plan Disclosure [Line Items]    
Defined benefit plan, total actual weighted average plan asset allocations 12.20% 22.10%
Target plan asset allocations 10.00%