Income Taxes (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($)
Operating Loss Carryforwards [Line Items]
Deferred tax asset credit carry forwards	$ 53.5
Foreign tax credit carry forwards	37.8
Valuation allowance increase (decrease)	(37.8)
Federal and state net operating loss carryforward	21.2
Second component of tax deductible goodwill, net of tax	1.3
Liability for uncertain tax positions	12.2
Accrued interest liability	4.4
Deferred tax asset, uncertain tax position	2.4
Interest expense (net of related deferred tax benefit)	1.8
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Valuation allowance increase (decrease)	(7.8)
Net operating loss carry forwards	337.4
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Deferred tax asset credit carry forwards	36.3
Valuation allowance increase (decrease)	(35.7)
Net operating loss carry forwards	$ 101.6