Restructuring Charges (Schedule of Restructuring and Related Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 6.2	$ 5.6	$ 9.4
Accelerated depreciation	0.8	0.8	1.1
Consulting, project implementation and management and other exit costs	10.1	9.8	19.6
Restructuring and related costs	17.1	16.2	30.1
Project Fuel
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred to date		163.7
Wet Shave
Restructuring Cost and Reserve [Line Items]
Severance Costs			1.5
Accelerated depreciation			1.1
Consulting, project implementation and management and other exit costs			2.7
Restructuring and related costs			5.3
Sun and Skin Care
Restructuring Cost and Reserve [Line Items]
Severance Costs			0.1
Accelerated depreciation			0.0
Consulting, project implementation and management and other exit costs			0.2
Restructuring and related costs			0.3
Feminine Care
Restructuring Cost and Reserve [Line Items]
Severance Costs			0.0
Accelerated depreciation			0.0
Consulting, project implementation and management and other exit costs			0.3
Restructuring and related costs			0.3
Corporate
Restructuring Cost and Reserve [Line Items]
Severance Costs			7.8
Accelerated depreciation			0.0
Consulting, project implementation and management and other exit costs			16.4
Restructuring and related costs			24.2
Selling, general and administrative expense | IT enablement
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	0.3	0.9	8.7
Cost of products sold | IT enablement
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs	$ 0.2	$ 0.0
Cost of products sold | Obsolescence
Restructuring Cost and Reserve [Line Items]
Restructuring and related costs			$ 0.6