v3.25.4
BUSINESS SEGMENT INFORMATION - Properties, Plants and Equipment, Net by Geographical Area (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Sep. 30, 2025
Assets:    
Total assets $ 5,502.5 $ 5,766.8
Property, plant and equipment, net and lease right-of-use assets:    
Total long-lived assets, net 1,335.9 1,355.8
UNITED STATES    
Property, plant and equipment, net and lease right-of-use assets:    
Total long-lived assets, net 799.9 814.7
EMEA    
Property, plant and equipment, net and lease right-of-use assets:    
Total long-lived assets, net 389.5 392.2
Asia Pacific And Other Americas    
Property, plant and equipment, net and lease right-of-use assets:    
Total long-lived assets, net 146.5 148.9
Operating Segments    
Assets:    
Total assets 5,003.9 5,308.5
Operating Segments | Customized Polymer Solutions    
Assets:    
Total assets 1,872.2 1,872.9
Operating Segments | Durable Metal Solutions    
Assets:    
Total assets 1,213.5 1,196.8
Operating Segments | Sustainable Fiber Solutions    
Assets:    
Total assets 1,705.0 1,917.1
Operating Segments | Innovative Closure Solutions    
Assets:    
Total assets 213.2 321.7
Corporate and other    
Assets:    
Total assets $ 498.6 $ 458.3