Leases (Schedule of Lease Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lease, Cost [Abstract]
Operating lease cost	$ 8.5	$ 7.0	$ 6.4
Finance lease cost
Amortization of leased assets	3.1	2.4	2.4
Interest on lease liabilities	0.9	0.6	0.7
Total finance lease cost	$ 4.0	$ 3.0	$ 3.1