v3.24.3
Income Taxes - Schedule of Difference Between US Federal Statutory Income Tax Rate and Effective Income Tax Rate (Details)
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Income Tax Disclosure [Abstract]      
U.S. federal statutory income tax rate 21.00% 21.00% 21.00%
State income taxes, net of federal tax benefit 3.00% 3.40% 2.60%
Effect of foreign operations 1.20% 1.30% 2.20%
Repatriation Tax   1.10%  
Share-based payment awards 0.40% 0.50% 0.60%
Unrecognized tax benefit 0.30% 0.30% 2.90%
Valuation allowances 0.10% 0.10% (7.20%)
Deferred tax impact of foreign branch conversion     2.70%
Other, net (0.40%) (0.90%)  
Effective tax rate 25.60% 26.80% 24.80%