v3.26.1
Segments (Segment Reporting Information - Geographic Segment Information) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]          
Assets $ 4,466.0   $ 4,466.0   $ 4,556.7
Long lived tangible assets 851.0   851.0   820.9
Net sales 734.1 $ 725.3 2,156.3 $ 2,119.9  
Depreciation and amortization     92.6 94.6  
Amortization of intangible assets 12.5 14.7 39.0 44.1  
U.S.          
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]          
Long lived tangible assets 612.6   612.6   589.7
Net sales 445.2 429.6 1,192.6 1,222.8  
Singapore          
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]          
Long lived tangible assets 62.5   62.5   41.8
Indonesia          
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]          
Long lived tangible assets 36.1   36.1   39.2
United Kingdom          
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]          
Long lived tangible assets 47.0   47.0   54.0
Other International          
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]          
Long lived tangible assets 92.8   92.8   $ 96.2
International          
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]          
Net sales $ 288.9 $ 295.7 $ 963.7 $ 897.1