Related Party Transactions (Details) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 15, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Sep. 30, 2019
Related Party Transaction [Line Items]
Selling, general and administrative expense		$ 116,100,000	$ 141,300,000	$ 238,200,000	$ 245,900,000
Cost of products sold		351,400,000	362,200,000	786,900,000	658,600,000
Earnings related to transition service agreements		(100,000)	(100,000)	(400,000)	(100,000)
Total Other items, net		(5,100,000)	(3,800,000)	(5,100,000)	13,100,000
TSA income		0	0	(3,800,000)	0
Due to Spectrum		1,400,000		1,400,000		$ 2,600,000
Due from Spectrum		16.8		16.8
Net loss		(117,700,000)	$ (73,300,000)	(71,600,000)	(2,500,000)
Discontinued Operations
Related Party Transaction [Line Items]
TSA income				(3,800,000)	(4,100,000)
Other items, net				300,000	700,000
Transition Services Agreement
Related Party Transaction [Line Items]
Selling, general and administrative expense		1,900,000		6,300,000	5,000,000.0
Cost of products sold		100,000		300,000	400,000
Expense resulting from supply agreement		4,600,000		9,400,000	$ 4,400,000
Transition Services Agreement | Accounts Payable
Related Party Transaction [Line Items]
Expense resulting from supply agreement				1,900,000		100,000
Transition Services Agreement | Discontinued Operations
Related Party Transaction [Line Items]
Payable to related party						22,500,000
Receivable recorded in assets held for sale						$ 8,900,000
Spectrum Brands Holdings
Related Party Transaction [Line Items]
Payments for rent		$ 500,000		1,100,000
Spectrum Auto Care Acquisition
Related Party Transaction [Line Items]
Newly-issued common stock in acquisition	$ 312,500,000			$ 4,300,000
Percentage of common stock owned		6.30%		6.30%