v3.26.1
Organization (Narrative) (Details)
$ in Millions
9 Months Ended
Jun. 30, 2026
USD ($)
business_segments
Jun. 30, 2025
USD ($)
Sep. 30, 2025
USD ($)
Segment Reporting [Line Items]      
Restructuring $ 2.0   $ 1.1
Restructuring Reserve, Accrual Adjustment $ 18.9 $ 5.1  
Number of Reportable Segments | business_segments 2    
Other Sundry Liabilities, Noncurrent $ 3.9    
Proceeds from Other Equity, Gross Amount 4.8    
Intercompany Loan related to NMTC 12.2    
Investment Fund Contribution for NMTC 16.5    
Sub-CDE loan from NMTC $ 16.2