Segment Data (Schedule of Supplemental Product Information) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Revenue from External Customer [Line Items]
Net sales	$ 519.5	$ 516.6	$ 942.3	$ 931.7
Razors and blades
Revenue from External Customer [Line Items]
Net sales	270.3	259.0	529.3	526.4
Sun care products
Revenue from External Customer [Line Items]
Net sales	154.4	164.2	211.6	211.6
Grooming products
Revenue from External Customer [Line Items]
Net sales	52.5	48.8	109.8	101.8
Wipes and other skin care products
Revenue from External Customer [Line Items]
Net sales	18.5	18.1	35.5	38.3
Shaving gels and creams
Revenue from External Customer [Line Items]
Net sales	$ 23.8	$ 26.5	$ 56.1	$ 53.6

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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+ Details