Segment Data (Schedule of Supplemental Product Information) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Revenue from External Customer [Line Items]
Net sales	$ 598.4	$ 547.7	$ 1,067.5	$ 1,011.0
Razors and blades
Revenue from External Customer [Line Items]
Net sales	278.4	275.3	525.4	531.0
Tampons, pads and liners
Revenue from External Customer [Line Items]
Net sales	80.1	59.4	161.0	131.8
Sun care products
Revenue from External Customer [Line Items]
Net sales	153.8	131.4	201.6	171.6
Grooming products
Revenue from External Customer [Line Items]
Net sales	38.0	34.4	85.3	80.7
Wipes and other skin care products
Revenue from External Customer [Line Items]
Net sales	17.9	17.5	35.7	35.8
Shaving gels and creams
Revenue from External Customer [Line Items]
Net sales	$ 30.2	$ 29.7	$ 58.5	$ 60.1