Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Taxes [Line Items]
Valuation allowances	$ 60.6	$ 79.4
Unremitted earnings not taxed	13.0	17.9
Income tax reconciliation foreign withholding taxes	0.7	0.9
Unrecognized tax benefits	35.6	41.7	$ 34.7	$ 42.6
UTB if recognized, would impact the reported effective tax rate	17.8
UTB if recognized, would impact the reported effective tax rate, net of federal benefit	16.8
Interest and penalties reported as accrued income tax	2.5
Employee retention credit receivable	5.9
Capital Loss Carryforward [Member]
Income Taxes [Line Items]
Capital loss carryforwards	$ 18.8	19.3
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	$ 700.9	806.9
Valuation allowances	41.2
Estimated future taxable income to utilize deferred tax assets	476.0
Estimated future capital gain to realize capital loss carryforwards	$ 190.7
Estimated future capital gain to realize capital loss carryforwards, expiration year	2024
UTB decrease due to uncertain tax positions	$ 1.4
State [Member] | Minimum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	2022
State [Member] | Maximum [Member]
Income Taxes [Line Items]
Operating loss carryforwards, expiration date	2041
Estimated future capital gain to realize capital loss carryforwards, expiration year	2036
Federal [Member]
Income Taxes [Line Items]
Tax credit carryforward gross	$ 0.6	$ 17.7
Tax credit carryforward, expiration year	2022
Valuation allowances	$ 0.6
Estimated future taxable income to realize foreign tax credits	$ 2.9
Estimated future taxable income to realize foreign tax credits, expiration year	2022
Estimated future capital gain to realize capital loss carryforwards	$ 66.4
DecreaseinForeignTaxCreditsResultingFromExpirations	$ 17.1
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
Federal and State [Member] | Capital Loss Carryforward [Member]
Income Taxes [Line Items]
Valuation allowances	$ 18.8