v3.26.3
Income Taxes - Schedule of Tax Attributes and Valuation Allowances (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Sep. 30, 2025
Tax Benefit Amount    
Capital loss carryforwards $ 72.0 $ 16.0
Net operating loss carryforwards 14.0 62.0
State tax credit carryforward 14.0 $ 13.0
Subtotal 100.0  
Other deferred tax assets 1.0  
Total 101.0  
Valuation Allowance    
Tax credit carryforward 1.0  
Subtotal 20.0  
Total 21.0  
Non-United States    
Tax Benefit Amount    
Net operating loss carryforward, subject to expiration 4.0  
Net operating loss carryforward, not subject to expiration 6.0  
Capital loss carryforwards 15.0  
State tax credit carryforward 2.0  
Valuation Allowance    
Net operating loss carryforward, subject to expiration 0.0  
Net operating loss carryforward, not subject to expiration 5.0  
Non-United States capital loss carryforward 15.0  
Tax credit carryforward 0.0  
Domestic Federal    
Tax Benefit Amount    
Capital loss carryforwards 57.0  
Valuation Allowance    
Non-United States capital loss carryforward 0.0  
State and Local    
Tax Benefit Amount    
Net operating loss carryforwards 4.0  
State tax credit carryforward 12.0  
Valuation Allowance    
Net operating loss carryforward, subject to expiration 0.0  
Tax credit carryforward $ 0.0