v3.26.1
Equity (Details) - USD ($)
shares in Thousands, $ in Millions
9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
May 31, 2026
Stock-based compensation      
Stock repurchase programs, authorized amount     $ 400.0
Common shares repurchased (in shares) 2,600 4,100  
Common shares repurchased, value $ 192.4 $ 309.5  
Excise tax (as a percent) 1.00%    
Amount remaining available for future stock repurchases $ 400.0    
Restricted Stock Units (RSUs)      
Stock-based compensation      
Shares issued (in shares) 341    
Restricted Stock Units (RSUs) | Employee      
Stock-based compensation      
Vesting period 3 years    
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) 146    
Performance Shares | Minimum      
Stock-based compensation      
Vesting rights (as a percent) 0.00%    
Performance Shares | Maximum      
Stock-based compensation      
Vesting rights (as a percent) 200.00%