Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Increase (decrease) in unrecognized tax benefits	$ 0.0
Unrecognized tax benefits that would impact effective tax rate	6.6	$ 6.2
Interest and penalty expense, excluding refunds	0.4	0.3	$ 0.2
Accrued interest and penalty	$ 3.7	$ 3.3