Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Valuation allowances	$ 48.7	$ 60.6
Unremitted earnings not taxed	17.7	13.0
Income tax reconciliation foreign withholding taxes	0.9	0.7
Unrecognized tax benefits	27.3	35.6	$ 41.7	$ 34.7
UTB if recognized, would impact the reported effective tax rate	11.5
UTB if recognized, would impact the reported effective tax rate, net of federal benefit	10.6
Interest and penalties reported as accrued income tax	1.7
Employee retention credit receivable		5.9
Capital Loss Carryforward [Member]
Income Taxes [Line Items]
Capital loss carryforwards	$ 18.8	18.8
Minimum [Member]
Income Taxes [Line Items]
Number of open tax years subject to audit	3 years
Maximum [Member]
Income Taxes [Line Items]
Number of open tax years subject to audit	6 years
State [Member]
Income Taxes [Line Items]
Operating loss carryforwards	$ 675.5	700.9
Valuation allowances	28.0
Estimated future taxable income to utilize deferred tax assets	360.1
Estimated future capital gain to realize capital loss carryforwards	$ 184.6
Estimated future capital gain to realize capital loss carryforwards, expiration year	2024
UTB decrease due to uncertain tax positions	$ 0.1
State [Member] | State Tax Credits [Member]
Income Taxes [Line Items]
Valuation allowances	$ 3.3
State [Member] | Minimum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	2023
State [Member] | Maximum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	2042
Estimated future capital gain to realize capital loss carryforwards, expiration year	2036
Federal [Member]
Income Taxes [Line Items]
Estimated future capital gain to realize capital loss carryforwards	$ 66.4
Federal [Member] | Minimum [Member]
Income Taxes [Line Items]
Estimated future capital gain to realize capital loss carryforwards, expiration year	2024
Federal [Member] | Maximum [Member]
Income Taxes [Line Items]
Estimated future capital gain to realize capital loss carryforwards, expiration year	2026
Foreign Tax Credit [Member]
Income Taxes [Line Items]
Capital loss carryforwards		$ 0.6
Federal and State [Member] | Capital Loss Carryforward [Member]
Income Taxes [Line Items]
Valuation allowances	$ 17.4