Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Sep. 30, 2021	Sep. 30, 2020
Receivables, net
Accounts receivable, trade	$ 97.0	$ 78.3
Accounts receivable, other	7.1	6.3
Total receivables, gross	104.1	84.6
Allowance for doubtful accounts	(0.2)	(1.5)
Receivables, net	103.9	83.1
Inventories
Inventory, raw materials, net	34.0	33.7
Inventory, work in process	0.1	0.1
Inventory, finished goods, net	83.8	116.7
Inventories	117.9	150.5
Accounts Payable
Accounts payable, trade	89.0	54.7
Accounts payable, other	2.9	2.0
Accounts payable	91.9	56.7
Other Current Liabilities
Estimated litigation liability, current	8.5	8.5
Accrued salaries, current	14.4	8.5
Derivative liability, current	4.7	4.6
Accrued advertising and promotion expense	3.8	1.7
Other accrued liabilities, current	11.7	9.3
Other current liabilities	$ 43.1	$ 32.6