Supplemental Financial Information (Schedule of Components of Interest Expense, Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Supplemental Income Statement Elements [Abstract]
Interest on revolving credit facility	$ 0.5	$ 9.6	$ 9.0
Line of credit fees	1.1	0.8	0.5
Debt issuance amortization costs	0.5	0.7	0.7
Interest income	(1.4)	(1.2)	(0.7)
Other	0.1	0.2	0.0
Total interest expense, net	$ 0.8	$ 10.1	$ 9.5