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Equity - Schedule of Common Stock Share Activity (Details) - shares
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning balance - Shares Outstanding (in shares) 0    
Beginning balance - Shares Issued (in shares) 0 220,000 220,000
Beginning balance - Shares Issued (in shares) 216,124,332    
Ending balance - Shares Outstanding (in shares) 0 0  
Ending balance - Shares Issued (in shares) 0 0 220,000
Ending balance - Shares Issued (in shares) 217,033,282 216,124,332  
Preferred stock, without par value      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning balance - Shares Outstanding (in shares) 0 220,000 220,000
Settlement of Equity Units - Shares Issued/Outstanding (in shares)   (220,000)  
Ending balance - Shares Outstanding (in shares) 0 0 220,000
Ending balance - Shares Issued (in shares) 0    
Common Stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning balance - Shares Issued (in shares) 216,124,332 210,906,052 210,560,494
Beginning balance - Shares Outstanding (in shares) 214,685,612 209,495,083 209,582,212
Employee and director plans - Shares Issued/Treasury (in shares) 908,950 164,250 345,558
Employee and director plans - shares Outstanding (in shares) 790,433 136,499 512,871
Repurchases of common stock - Shares Treasury/Outstanding (in shares) (1,000,000)   (600,000)
Settlement of Equity Units - Shares Issued/Outstanding (in shares)   5,054,030  
Settlement of Equity Units - Shares Outstanding (in shares)   5,054,030  
Ending balance - Shares Issued (in shares) 217,033,282 216,124,332 210,906,052
Ending balance - Shares Outstanding (in shares) 214,476,045 214,685,612 209,495,083
Common Stock | Treasury stock      
Increase (Decrease) in Stockholders' Equity [Roll Forward]      
Beginning balance - Treasury Shares (in shares) (1,438,720) (1,410,969) (978,282)
Employee and director plans - Shares Issued/Treasury (in shares) 118,517 27,751 167,313
Repurchases of common stock - Shares Treasury/Outstanding (in shares) (1,000,000)   (600,000)
Ending balance - Treasury Shares (in shares) (2,557,237) (1,438,720) (1,410,969)