Segment Data (Schedule of Segment Sales and Profitability) (Details) - USD ($) $ in Millions		3 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales		$ 454.0	$ 457.1
Restructuring and related costs	[1]	8.0	18.5
Acquisition and planning costs	[2]	6.2	0.5
Gain on sale of Infant and Pet Care business		(5.2)	0.0
Feminine and Infant Care evaluation costs	[3]	0.3	0.0
Sun Care reformulation costs	[4]	0.0	0.1
Investor settlement expense	[5]	0.0	0.9
Amortization of intangibles		4.3	4.5
Interest and other expense, net		12.7	17.3
Earnings before income taxes		29.6	7.6
Wet Shave
Segment Reporting Information [Line Items]
Net sales		277.0	287.7
Segment profit		52.9	55.0
Sun and Skin Care
Segment Reporting Information [Line Items]
Net sales		75.1	66.7
Segment profit		0.1	(0.6)
Feminine Care
Segment Reporting Information [Line Items]
Net sales		75.1	74.7
Segment profit		13.1	7.5
All Other
Segment Reporting Information [Line Items]
Net sales		26.8	28.0
Segment profit		3.1	1.2
Operating Segments
Segment Reporting Information [Line Items]
Segment profit		69.2	63.1
Corporate
Segment Reporting Information [Line Items]
General corporate and other expenses		13.3	13.7
Selling, general and administrative expenses
Segment Reporting Information [Line Items]
Acquisition and planning costs		6.2
Cost of products sold
Segment Reporting Information [Line Items]
Sun Care reformulation costs		0.1
Project Fuel
Segment Reporting Information [Line Items]
Restructuring and related costs		8.0	18.5
Project Fuel | Wet Shave
Segment Reporting Information [Line Items]
Restructuring and related costs		2.8	9.6
Project Fuel | Sun and Skin Care
Segment Reporting Information [Line Items]
Restructuring and related costs		0.0	0.5
Project Fuel | Feminine Care
Segment Reporting Information [Line Items]
Restructuring and related costs		0.0	0.3
Project Fuel | All Other
Segment Reporting Information [Line Items]
Restructuring and related costs		0.0	0.1
Project Fuel | Corporate
Segment Reporting Information [Line Items]
Restructuring and related costs		5.2	8.0
IT enablement | Project Fuel | Selling, general and administrative expenses
Segment Reporting Information [Line Items]
Restructuring and related costs		$ 1.9	$ 1.4

[1] Includes pre-tax SG&A of $1.9 and $1.4 for the three months ended December 31, 2019 and 2018, respectively, associated with certain information technology enablement expenses for Project Fuel.

[2] Includes pre-tax SG&A of $6.2 and $0.5 for the three months ended December 31, 2019 and 2018, respectively, related to acquisition and integration planning costs.

[3] Includes pre-tax SG&A of $0.3 for the three months ended December 31, 2019.

[4] Includes pre-tax Cost of products sold of $0.1 for the three months ended December 31, 2018.

[5] Includes pre-tax SG&A of $0.9 for the three months ended December 31, 2018.