Income Taxes (Gross Unrecognized Tax Benefits Reconciliation) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]
Balance of liability as of January 1,	$ 16.5	$ 7.6	$ 10.3
Tax positions taken during a prior year	(1.0)	(0.2)	0.0
Tax positions taken during the current year	0.4	0.5	0.4
Settlements with taxing authorities	0.0	(0.1)	0.0
Lapse of the statute of limitations	(7.8)	(5.2)	(3.1)
Other	0.0	13.9	0.0
Balance of liability as of December 31,	$ 8.1	$ 16.5	$ 7.6