Leases - Summary of Lease-Related Assets and Liabilities (Details) - USD ($) $ in Millions		Sep. 30, 2021	Sep. 30, 2020
Operating leases:
Right-of-use asset		$ 69.5	$ 58.8
Current portion of lease liabilities		22.0	18.3
Lease liabilities		54.2	47.5
Total operating lease liabilities		76.2	65.8
Finance leases:
Right-of-use asset	[1]	32.1	24.3
Current portion of lease liabilities	[2]	14.9	4.1
Lease liabilities	[3]	12.7	14.6
Total finance lease liabilities		$ 27.6	$ 18.7

[1] Included in “Property and equipment, net” in the consolidated balance sheet.

[2] Included in “Accrued expenses and other liabilities” in the consolidated balance sheet.

[3] Included in “Other liabilities” in the consolidated balance sheet.