Leases (Supplemental Cash Flow Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Cash paid for amounts included in measurement of operating lease liabilities - operating cash flows	$ 8.2	$ 9.2	$ 9.8
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 16.5	$ 13.4	$ 1.5