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Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Nov. 05, 2024
Nov. 26, 2024
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Subsequent Event [Line Items]          
Quarterly cash dividend declared (in usd per share)     $ 2.04 $ 1.94 $ 1.84
Subsequent Event          
Subsequent Event [Line Items]          
Bridge Loan $ 3,300        
Dividend increase percentage   8.00%      
Quarterly cash dividend declared (in usd per share)   $ 0.55      
Retina Consultants of America ("RCA") | Subsequent Event          
Subsequent Event [Line Items]          
Purchase price 4,600        
Expected cash outlay $ 4,300        
Ownership percentage 85.00%        
Aggregate contingent consideration $ 500