Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Sep. 30, 2020	Sep. 30, 2019
Receivables, net
Accounts receivable, before allowance for credit loss, current	$ 78.3	$ 62.8
Other receivables, gross, current	6.3	5.6
Total receivables, gross	84.6	68.4
Allowance for doubtful accounts, premiums and other receivables	(1.5)	0.0
Receivables, net	83.1	68.4
Inventories
Inventory, raw materials, net	33.7	26.4
Inventory, work in process	0.1	0.1
Inventory, finished goods, net	116.7	111.7
Inventories	150.5	138.2
Accounts Payable
Accounts payable, trade	54.7	60.5
Bank overdrafts	0.0	0.4
Accounts payable, other	2.0	0.8
Accounts Payable	56.7	61.7
Other Current Liabilities
Estimated litigation liability, current	8.5	8.5
Accrued salaries, current	8.5	11.5
Derivative liability, current	4.6	0.0
Operating lease liability, current	2.2	0.0
Accrued advertising and promotion expense	1.7	3.3
Other accrued liabilities, current	7.1	7.7
Other current liabilities	$ 32.6	$ 31.0
Operating lease liability, current, Balance Sheet location	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent