Quarterly report [Sections 13 or 15(d)]

Equity (Details)

v3.25.1
Equity (Details) - USD ($)
$ in Millions
6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Stock-based compensation    
Common shares repurchased (in shares) 4,100,000 0
Common shares repurchased, value $ 309.5  
Excise tax percentage 1.00%  
Amount remaining available for future stock repurchases $ 65.8  
June 2024 Resolution Adoptions    
Stock-based compensation    
Stock repurchase programs, authorized amount 400.0  
December 2024 Resolution Adoptions    
Stock-based compensation    
Stock repurchase programs, authorized amount $ 400.0  
Restricted Stock Units (RSUs)    
Stock-based compensation    
Shares issued (in shares) 356,000  
Restricted Stock Units (RSUs) | Member of Board of Directors    
Stock-based compensation    
Vesting period 1 year  
Restricted Stock Units (RSUs) | Minimum    
Stock-based compensation    
Vesting period 1 year  
Restricted Stock Units (RSUs) | Minimum | Employee    
Stock-based compensation    
Vesting period 3 years  
Restricted Stock Units (RSUs) | Maximum    
Stock-based compensation    
Vesting period 4 years  
Restricted Stock Units (RSUs) | Maximum | Employee    
Stock-based compensation    
Vesting period 4 years  
Performance Shares    
Stock-based compensation    
Vesting period 3 years  
Shares issued (in shares) 154,000  
Performance Shares | Minimum    
Stock-based compensation    
Vesting rights, percentage 0.00%  
Performance Shares | Maximum    
Stock-based compensation    
Vesting rights, percentage 200.00%