v3.25.2
Information by Operating Segment - Reconciliation of Adjusted Earnings (Loss) to Net Income (Loss) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Segment Reconciliation [Abstract]        
Net Income (Loss) $ 20.9 $ (12.6) $ 311.5 $ 276.8
Fair value and timing adjustments (22.4) 6.2 (15.8) (9.2)
Acquisition and restructuring activities 0.0 4.8 0.0 6.7
Income tax adjustments 5.6 (2.7) 3.9 0.7
Adjusted Earnings (Loss) $ 4.1 $ (4.3) $ 299.6 $ 275.0