v3.26.1
STOCKHOLDERS’ EQUITY AND EQUITY INSTRUMENTS - Schedule of Components and Changes in Accumulated Other Comprehensive Income (Loss) (Details)
$ in Millions
 9 Months Ended
Jun. 30, 2026
USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Beginning Balance $ 234.1
Other comprehensive loss before reclassifications (17.3)
Amounts reclassified from AOCL 15.2
Net current period other comprehensive income (loss) (2.1)
Ending Balance 263.5
Unrealized foreign currency translation adjustments 1.8
Total  
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Beginning Balance (107.9)
Ending Balance (110.0)
Gains and (Losses) on Cash Flow Hedges  
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Beginning Balance (0.8)
Other comprehensive loss before reclassifications (1.9)
Amounts reclassified from AOCL 1.5
Net current period other comprehensive income (loss) (0.4)
Ending Balance (1.2)
Benefit Plans | Defined Benefit Pension  
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Beginning Balance (6.3)
Other comprehensive loss before reclassifications 0.0
Amounts reclassified from AOCL 0.6
Net current period other comprehensive income (loss) 0.6
Ending Balance (5.7)
Benefit Plans | Other Post-Employment Benefits  
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Beginning Balance 1.8
Other comprehensive loss before reclassifications 0.0
Amounts reclassified from AOCL 0.0
Net current period other comprehensive income (loss) 0.0
Ending Balance 1.8
Foreign Currency  
AOCI Attributable to Parent, Net of Tax [Roll Forward]  
Beginning Balance (102.6)
Other comprehensive loss before reclassifications (15.4)
Amounts reclassified from AOCL 13.1
Net current period other comprehensive income (loss) (2.3)
Ending Balance $ (104.9)