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Equity - Schedule of Share Repurchased under Share Repurchase Program (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2025
Equity [Abstract]    
Repurchased shares (in shares) 20,000 80,383
Amount (in millions) $ 1 $ 3