Note 10. Income Taxes Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	21.00%
Residual Tax Release from AOCI	$ 11.9
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability	10.6
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	3.2
Net Tax Expense (Benefit) Impact, CARES Act		$ 0.5	$ (2.5)
Income (Loss) from Continuing Operations before Income Taxes, Domestic	137.2	127.1	44.6
Income (Loss) from Continuing Operations before Income Taxes, Foreign	$ 11.8	$ (0.6)	$ 10.6