Income Taxes - Unrecognized Tax Benefits (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Income Tax Contingency [Line Items]
Amount of unrecognized tax benefits which, if recognized, would affect the effective tax rate	$ 5.1
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Balance at the beginning of the period	9.3
Increases related to prior year tax positions	1.8
Decreases due to lapse in statutes	(0.2)
Currency movement	0.8
Balance at the end of the period	11.7
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	5.1
Minimum
Income Tax Contingency [Line Items]
Amount of unrecognized tax benefits which, if recognized, would affect the effective tax rate	2.3
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Decrease in unrecognized tax benefits, that is reasonably possible	3.1
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	2.3
Maximum
Income Tax Contingency [Line Items]
Amount of unrecognized tax benefits which, if recognized, would affect the effective tax rate	2.9
Reconciliation of the beginning and ending amount of unrecognized tax benefits
Decrease in unrecognized tax benefits, that is reasonably possible	5.6
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 2.9