Lease Commitments - Schedule of Future Lease Payments for Operating and Finance Leases After Adoption (Details) $ in Millions	Sep. 30, 2024 USD ($)
Operating leases
2025	$ 45.9
2026	44.9
2027	42.6
2028	39.9
2029	37.2
Thereafter	193.1
Total future lease payments	403.6
Imputed interest	92.7
Present value of lease liabilities	310.9
Finance leases
2025	24.1
2026	25.0
2027	25.1
2028	25.3
2029	25.1
Thereafter	171.5
Total future lease payments	296.1
Imputed interest	75.4
Present value of lease liabilities	220.7
Undiscounted future lease payments for leases not yet commenced	$ 30.1
Undiscounted future lease payments for leases not yet commenced, term of lease	15 years