Segment Data (Schedule of Supplemental Product Information) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue from External Customer [Line Items]
Net sales	$ 650.0	$ 623.8	$ 1,717.5	$ 1,634.8
Razors and blades
Revenue from External Customer [Line Items]
Net sales	291.2	290.1	816.6	821.1
Tampons, pads and liners
Revenue from External Customer [Line Items]
Net sales	81.0	81.3	242.0	213.1
Sun care products
Revenue from External Customer [Line Items]
Net sales	184.2	162.4	385.8	334.0
Grooming products
Revenue from External Customer [Line Items]
Net sales	38.2	33.9	123.5	114.6
Wipes and other skin care products
Revenue from External Customer [Line Items]
Net sales	22.5	19.9	58.2	55.7
Shaving gels and creams
Revenue from External Customer [Line Items]
Net sales	$ 32.9	$ 36.2	$ 91.4	$ 96.3