v3.25.1
Goodwill and Intangible Assets (Schedule of Amortizable Intangible Assets) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Sep. 30, 2024
Finite-Lived Intangible Assets [Line Items]          
Amortizable intangible assets, gross carrying amount $ 690.1   $ 690.1   $ 692.0
Amortizable intangible assets, accumulated amortization 355.4   355.4   341.2
Amortizable intangible assets, net 334.7   334.7   350.8
Other intangible assets, net 930.0   930.0   948.5
Intangible Assets, Gross (Excluding Goodwill) 1,285.4   1,285.4   1,289.7
Amortization of intangibles 7.7 $ 7.8 15.5 $ 15.6  
Amortizable intangible assets, amortization expense, remainder of 2023 15.5   15.5    
Amortizable intangible assets, amortization expense, fiscal 2024 30.7   30.7    
Amortizable intangible assets, amortization expense, fiscal 2025 30.5   30.5    
Amortizable intangible assets, amortization expense, fiscal 2026 30.4   30.4    
Amortizable intangible assets, amortization expense, fiscal 2027 30.4   30.4    
Amortizable intangible assets, amortization expense, fiscal 2028 30.3   30.3    
Amortizable intangible assets, amortization expense, after fiscal 2028 166.9   166.9    
Indefinite-lived intangible assets 595.3   595.3   597.7
Trade names and brands          
Finite-Lived Intangible Assets [Line Items]          
Amortizable intangible assets, gross carrying amount 339.7   339.7   339.8
Amortizable intangible assets, accumulated amortization 111.8   111.8   104.0
Amortizable intangible assets, net 227.9   227.9   235.8
Technology and patents          
Finite-Lived Intangible Assets [Line Items]          
Amortizable intangible assets, gross carrying amount 79.5   79.5   79.7
Amortizable intangible assets, accumulated amortization 77.3   77.3   77.3
Amortizable intangible assets, net 2.2   2.2   2.4
Customer related and other          
Finite-Lived Intangible Assets [Line Items]          
Amortizable intangible assets, gross carrying amount 270.9   270.9   272.5
Amortizable intangible assets, accumulated amortization 166.3   166.3   159.9
Amortizable intangible assets, net $ 104.6   $ 104.6   $ 112.6