Business Combinations - Consideration Paid and Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Sep. 30, 2026	Sep. 30, 2025
Summary of the aggregate consideration paid and the aggregate amounts of the assets acquired and liabilities assumed
Accounts receivable	$ 0.0	$ 0.0
Inventories	23.9	2.8
Other current assets	0.0	0.1
Property and equipment	108.3	0.5
Indefinite-lived intangibles	537.6	25.4
Other noncurrent assets	0.0	0.0
Current liabilities	(0.1)	(7.3)
Noncurrent liabilities	0.0	0.0
Total cash used in acquisitions	$ 669.7	$ 21.5