v3.26.1
Share-based Payments - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]      
Compensation expense related to share-based payments $ 26.5 $ 46.1  
Decrease in compensation 18.2    
Unrecognized compensation expense $ 91.9   $ 106.7
Recognition period of unrecognized compensation expense (in years) 3 years   3 years
PEP Units      
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]      
Vesting period (in years) 3 years