Income Taxes - Effective Income Tax Rate Reconciliation (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Holiday [Line Items]
Document Fiscal Year Focus	2022
Effective Income Tax Rate Reconciliation [Abstract]
Income tax expense (benefit) at U.S. federal statutory income tax rate	$ (87.8)	$ 22.0	$ 2.4
State and local taxes, net of Federal income tax benefit	0.6	0.3	0.5
Foreign operations tax effect	6.4	3.5	2.0
Research and experimentation tax credits	(3.4)	(4.0)	(3.3)
Valuation allowance	0.8	(59.7)	9.6
Tax contingencies	(1.1)	0.6	0.0
Effective Income Tax Rate Reconciliation, Tax Holiday, Percent	(0.4)	(10.6)	(4.3)
Foreign taxes	1.1	1.0	0.3
Other, principally non-tax deductible items	0.2	(0.2)	0.1
Stock-based compensation	1.8	5.1	1.3
Other, principally non-tax deductible items	1.2	0.1	0.1
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Amount	90.6	0.0	0.0
Prior period items	1.8	(0.5)	(1.0)
Total income tax expense (benefit)	11.9	(45.6)	8.4
Effective Income Tax Rate Reconciliation, Foreign Currency Adjustments, Percent	0.0	(0.7)	(0.7)
Foreign statutory income tax rate	0.1	(2.5)	1.4
Valuation allowance	(39.7)	(39.1)	(98.0)
Foreign Tax Authority
Effective Income Tax Rate Reconciliation [Abstract]
Effective income tax rate reconciliation, tax holiday	$ 0.8	$ 10.7	$ 3.8
Income tax holiday benefit (usd per share)	$ 0.01	$ 0.12	$ 0.04