Goodwill and Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Sep. 30, 2023
Goodwill [Line Items]
Goodwill, Gross	$ 1,708.1	$ 1,702.4
Accumulated goodwill impairment loss	371.0	371.0
Goodwill [Roll Forward]
Beginning balance	1,331.4
Cumulative translation adjustment	(5.7)
Ending balance	1,337.1
Wet Shave
Goodwill [Line Items]
Goodwill, Gross	1,144.5	1,140.5
Accumulated goodwill impairment loss	369.0	369.0
Goodwill [Roll Forward]
Beginning balance	771.5
Cumulative translation adjustment	(4.0)
Ending balance	775.5
Sun and Skin Care
Goodwill [Line Items]
Goodwill, Gross	356.6	355.9
Accumulated goodwill impairment loss	2.0	2.0
Goodwill [Roll Forward]
Beginning balance	353.9
Cumulative translation adjustment	(0.7)
Ending balance	354.6
Feminine Care
Goodwill [Line Items]
Goodwill, Gross	207.0	206.0
Accumulated goodwill impairment loss	0.0	$ 0.0
Goodwill [Roll Forward]
Beginning balance	206.0
Cumulative translation adjustment	(1.0)
Ending balance	$ 207.0