8th Ave (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023	Sep. 30, 2022
Schedule of Equity Method Investments
Net Sales	$ 1,999.0	$ 1,619.9	$ 3,964.9	$ 3,186.2
Accounts payable	396.3		396.3		$ 368.8
Other liabilities	279.6		279.6		276.7
8th Avenue
Schedule of Equity Method Investments
Net Sales	2.1	3.1	3.8	5.5
Purchases from and Royalties paid to Related Party	19.7	$ 25.1	39.6	$ 48.4
Accounts Payable | 8th Avenue
Schedule of Equity Method Investments
Accounts payable	13.7		13.7		13.3
Other Assets | 8th Avenue
Schedule of Equity Method Investments
Accounts Receivable, after Allowance for Credit Loss, Noncurrent	12.9		12.9		12.9
Other Liabilities | 8th Avenue
Schedule of Equity Method Investments
Other liabilities	$ 0.7		$ 0.7		0.7
8th Avenue
Schedule of Equity Method Investments
Equity Method Investment, Ownership Percentage	60.50%		60.50%
8th Avenue | Equity Method Investments
Schedule of Equity Method Investments
Equity method investments	$ 0.0		$ 0.0		$ 0.0	$ 0.0