Goodwill and Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021	Sep. 30, 2021
Goodwill [Line Items]
Goodwill, Gross	$ 1,713.7	$ 1,533.8
Accumulated goodwill impairment loss	371.0	371.0
Goodwill [Roll Forward]
Beginning balance	1,162.8
Goodwill, Acquired During Period	181.0
Cumulative translation adjustment	1.1
Ending balance	1,342.7
Wet Shave
Goodwill [Line Items]
Goodwill, Gross	1,147.1	967.5
Accumulated goodwill impairment loss	369.0	369.0
Goodwill [Roll Forward]
Beginning balance	598.5
Goodwill, Acquired During Period	181.0
Cumulative translation adjustment	1.4
Ending balance	778.1
Sun and Skin Care
Goodwill [Line Items]
Goodwill, Gross	357.7	357.6
Accumulated goodwill impairment loss	2.0	2.0
Goodwill [Roll Forward]
Beginning balance	355.6
Goodwill, Acquired During Period	0.0
Cumulative translation adjustment	(0.1)
Ending balance	355.7
Feminine Care
Goodwill [Line Items]
Goodwill, Gross	208.9	208.7
Accumulated goodwill impairment loss	0.0	$ 0.0
Goodwill [Roll Forward]
Beginning balance	208.7
Goodwill, Acquired During Period	0.0
Cumulative translation adjustment	(0.2)
Ending balance	$ 208.9