Goodwill and Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2025	Sep. 30, 2024
Goodwill [Line Items]
Goodwill, Gross	$ 1,713.9	$ 1,709.6
Accumulated goodwill impairment loss	371.0	371.0
Goodwill [Roll Forward]
Beginning balance	1,338.6
Cumulative translation adjustment	(4.3)
Ending balance	1,342.9
Wet Shave
Goodwill [Line Items]
Goodwill, Gross	1,150.1	1,146.0
Accumulated goodwill impairment loss	369.0	369.0
Goodwill [Roll Forward]
Beginning balance	777.0
Cumulative translation adjustment	(4.1)
Ending balance	781.1
Sun and Skin Care
Goodwill [Line Items]
Goodwill, Gross	357.8	357.4
Accumulated goodwill impairment loss	2.0	2.0
Goodwill [Roll Forward]
Beginning balance	355.4
Cumulative translation adjustment	(0.4)
Ending balance	355.8
Feminine Care
Goodwill [Line Items]
Goodwill, Gross	206.0	206.2
Accumulated goodwill impairment loss	0.0	$ 0.0
Goodwill [Roll Forward]
Beginning balance	206.2
Cumulative translation adjustment	0.2
Ending balance	$ 206.0