v3.26.1
Goodwill and Intangible Assets (Schedule of Goodwill) (Details) - USD ($)
$ in Millions
6 Months Ended
Mar. 31, 2026
Sep. 30, 2025
Goodwill [Line Items]    
Goodwill, Gross $ 1,505.6 $ 1,508.1
Accumulated goodwill impairment loss 371.0 371.0
Goodwill [Roll Forward]    
Beginning balance 1,137.1  
Cumulative translation adjustment 2.5  
Ending balance 1,134.6  
Wet Shave    
Goodwill [Line Items]    
Goodwill, Gross 1,148.4 1,150.6
Accumulated goodwill impairment loss 369.0 369.0
Goodwill [Roll Forward]    
Beginning balance 781.6  
Cumulative translation adjustment 2.2  
Ending balance 779.4  
Sun and Skin Care    
Goodwill [Line Items]    
Goodwill, Gross 357.2 357.5
Accumulated goodwill impairment loss 2.0 $ 2.0
Goodwill [Roll Forward]    
Beginning balance 355.5  
Cumulative translation adjustment 0.3  
Ending balance $ 355.2