Goodwill and Intangible Assets (Schedule of Amortizable Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross carrying amount	$ 465.4		$ 465.4		$ 418.0
Amortizable intangible assets, accumulated amortization	193.2		193.2		180.2
Amortizable intangible assets, net	272.2		272.2		237.8
Amortization of intangibles	4.6	$ 4.0	13.2	$ 12.1
Amortizable intangible assets, amortization expense, remainder of 2018	4.5		4.5
Amortizable intangible assets, amortization expense, fiscal 2019	17.8		17.8
Amortizable intangible assets, amortization expense, fiscal 2020	17.2		17.2
Amortizable intangible assets, amortization expense, fiscal 2021	16.6		16.6
Amortizable intangible assets, amortization expense, fiscal 2022	16.4		16.4
Amortizable intangible assets, amortization expense, fiscal 2023	16.4		16.4
Amortizable intangible assets, amortization expense, thereafter	183.5		183.5
Trade names and brands
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross carrying amount	206.7		206.7		188.6
Amortizable intangible assets, accumulated amortization	23.0		23.0		16.0
Amortizable intangible assets, net	183.7		183.7		172.6
Technology and patents
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross carrying amount	79.0		79.0		77.9
Amortizable intangible assets, accumulated amortization	75.7		75.7		74.4
Amortizable intangible assets, net	3.3		3.3		3.5
Customer related and other
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets, gross carrying amount	179.7		179.7		151.5
Amortizable intangible assets, accumulated amortization	94.5		94.5		89.8
Amortizable intangible assets, net	85.2		85.2		$ 61.7
Skintimate brand name
Finite-Lived Intangible Assets [Line Items]
Useful life assigned to Skintimate brand name (in years)					20 years
Playtex brand name
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$ 1.8		5.4
Jack Black | Trade names and brands
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets acquired during period			17.5
Jack Black | Technology and patents
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets acquired during period			1.2
Jack Black | Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets acquired during period			0.5
Jack Black | Customer relationships
Finite-Lived Intangible Assets [Line Items]
Amortizable intangible assets acquired during period			$ 28.5