Leases (Presentation on Consolidated Balance Sheet) (Details) - USD ($) $ in Millions	Sep. 30, 2024	Sep. 30, 2023
Leases [Abstract]
Operating lease right-of-use assets	$ 1,047.7	$ 974.0
Payables and accrued liabilities	100.3	94.7
Noncurrent operating lease liabilities	677.9	631.1
Total operating lease liabilities	$ 778.2	$ 725.8
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Payables and accrued liabilities	Payables and accrued liabilities