Goodwill and Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2025	Sep. 30, 2025
Goodwill [Line Items]
Goodwill, Gross	$ 1,508.4	$ 1,508.1
Accumulated goodwill impairment loss	371.0	371.0
Goodwill [Roll Forward]
Beginning balance	1,137.1
Cumulative translation adjustment	(0.3)
Ending balance	1,137.4
Wet Shave
Goodwill [Line Items]
Goodwill, Gross	1,150.9	1,150.6
Accumulated goodwill impairment loss	369.0	369.0
Goodwill [Roll Forward]
Beginning balance	781.6
Cumulative translation adjustment	(0.3)
Ending balance	781.9
Sun and Skin Care
Goodwill [Line Items]
Goodwill, Gross	357.5	357.5
Accumulated goodwill impairment loss	2.0	$ 2.0
Goodwill [Roll Forward]
Beginning balance	355.5
Cumulative translation adjustment	0.0
Ending balance	$ 355.5