Lease Commitments - Schedule of Future Lease Payments for Operating and Finance Leases After Adoption (Details) $ in Millions	Sep. 30, 2023 USD ($)
Operating leases
2024	$ 41.1
2025	39.6
2026	38.1
2027	35.4
2028	32.7
Thereafter	159.8
Total future lease payments	346.7
Imputed interest	70.2
Present value of lease liabilities	276.5
Finance leases
2024	22.5
2025	22.7
2026	23.3
2027	23.1
2028	23.3
Thereafter	168.9
Total future lease payments	283.8
Imputed interest	72.6
Present value of lease liabilities	211.2
Undiscounted future lease payments for leases not yet commenced	$ 61.0
Undiscounted future lease payments for leases not yet commenced, term of lease	15 years