Income Taxes - Summary of Net Operating Loss Carryforwards (Details) $ in Millions	Dec. 31, 2020 USD ($)
United States Federal and Non-United States
Income Tax Contingency [Line Items]
2021	$ 5.2
2022	6.7
2023	3.9
2024	7.2
2025	20.7
Thereafter	49.6
No expirations	565.3
Total net operating loss carryforwards	658.6
United States State
Income Tax Contingency [Line Items]
2021	4.6
2022	5.0
2023	9.8
2024	55.9
2025	5.6
Thereafter	85.5
No expirations	0.8
Total net operating loss carryforwards	$ 167.2