Income Taxes (Narratives) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Loss Carryforwards [Line Items]
Interest expense limitation carryforward	$ 10.9
Valuation allowance	44.4	$ 37.7
Unrecognized tax benefits that would impact effective tax rate	48.1
Unrecognized tax benefits, income tax penalties and interest expense	4.5
Accrued interest and penalties	5.0	$ 9.6
Expected decrease of unrecognized tax benefits	3.0
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	11.1
Valuation allowance	25.3
Domestic Tax Authority | Research Tax Credit Carryforward
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	14.8
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	39.2
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	59.5
Valuation allowance	$ 19.1