Leases (Future Lease Payments) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Operating Leases
Year 1	$ 52.8	$ 47.8
Year 2	43.0	36.6
Year 3	32.6	27.0
Year 4	19.7	19.1
Year 5	14.7	13.4
Thereafter	46.5	51.2
Total lease payments	209.3	195.1
Less: imputed interest	(29.5)	(27.5)
Present value of lease liabilities	179.8	167.6
Finance Leases
Year 1	0.7	0.8
Year 2	0.6	0.6
Year 3	0.4	0.4
Year 4	0.3	0.2
Year 5	0.1	0.2
Thereafter	5.8	6.0
Total lease payments	7.9	8.2
Less: imputed interest	(2.0)	(2.1)
Present value of lease liabilities	$ 5.9	$ 6.1