Segment Data (Schedule of Segment Sales and Profitability) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Segment Reporting Information [Line Items]
Net sales	$ 599,400,000	$ 598,400,000	$ 1,088,300,000	$ 1,067,500,000
Segment profit	70,100,000	56,800,000	96,200,000	88,700,000
Acquisition and integration costs	(700,000)	(2,000,000.0)	(1,400,000)	(4,100,000)
Sun Care reformulation costs	(400,000)	(600,000)	(900,000)	(1,100,000)
Wet Ones manufacturing plant fire	(3,800,000)	0	(5,300,000)	0
Loss Contingency, Damages Sought, Value	(1,400,000)		(1,400,000)
Other project costs	(1,100,000)	(500,000)	(1,200,000)	(500,000)
General corporate and other expenses	(7,800,000)	(7,700,000)	(15,600,000)	(15,400,000)
Amortization of intangibles	(23,100,000)	(23,000,000.0)	(43,200,000)	(37,900,000)
Earnings before income taxes	47,000,000.0	26,600,000	53,000,000.0	43,600,000
Pension settlement expense		7,200,000		7,200,000
Restructuring Charges, including amounts included in Cost of Products Sold		200,000		200,000
Restructuring Charges, Including Amounts in Selling, General and Administrative Expenses		0		100,000
Restructuring Charges	(3,200,000)	(3,000,000.0)	(10,000,000.0)	(5,700,000)
Restructuring charges, including amounts in COGS				(5,800,000)
Wet Shave
Segment Reporting Information [Line Items]
Net sales	293,100,000	308,600,000	594,800,000	583,900,000
Segment profit	40,400,000	35,400,000	94,100,000	71,100,000
Sun and Skin Care
Segment Reporting Information [Line Items]
Net sales	235,800,000	209,700,000	351,200,000	322,600,000
Segment profit	54,400,000	40,000,000.0	53,100,000	53,300,000
Feminine Care
Segment Reporting Information [Line Items]
Net sales	70,500,000	80,100,000	142,300,000	161,000,000.0
Segment profit	8,700,000	12,200,000	16,000,000.0	24,100,000
Total Segments
Segment Reporting Information [Line Items]
Segment profit	103,500,000	87,600,000	163,200,000	148,500,000
Corporate
Segment Reporting Information [Line Items]
General Corporate and Other Expenses	(15,000,000.0)	(17,000,000.0)	(31,200,000)	(32,900,000)
Selling, general and administrative expenses
Segment Reporting Information [Line Items]
Acquisition and integration costs	(700,000)	(2,000,000.0)	(1,400,000)	(4,100,000)
Other project costs	$ (1,100,000)	(500,000)	$ (1,200,000)	(500,000)
Pension settlement expense				7.2
Restructuring Charges, Including Amounts in Selling, General and Administrative Expenses				100,000
Cost of products sold
Segment Reporting Information [Line Items]
Restructuring Charges, including amounts included in Cost of Products Sold		$ 200,000		$ 200,000