Income Taxes - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating Loss Carryforwards [Line Items]
Effective income tax rate reconciliation, at federal statutory income tax rate, percent					35.00%
Minimum tax credit refundable					$ 2.2	$ 0.0
Income tax refunds						2.2
Net cash paid for income taxes					0.0	0.1
Valuation allowance					237.9	339.3
Deferred tax liabilities					1.0	7.3
Unremitted foreign earnings in deferred tax liabilities related to foreign tax withholding					1.0
Unrecognized tax benefits, excluding accrued interest and penalties					0.9	$ 1.3	$ 1.7
Unrecognized tax benefits that would impact effective tax rate					0.9
Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					673.0
Capital Loss Carryforward | Internal Revenue Service (IRS) | Between 2018 and 2021
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards					37.7
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					513.3
U.S. and Foreign
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards					22.8
U.S. and Foreign | Expiring between 2018 and 2020
Operating Loss Carryforwards [Line Items]
Tax credit carryforwards					3.0
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					95.5
Foreign Tax Authority | Expiring between 2018 and 2020
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					1.1
Foreign Tax Authority | Tax Year 2026
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					42.4
Foreign Tax Authority | Indefinite
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					52.0
Parent Company | Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					587.5
Subsidiaries
Operating Loss Carryforwards [Line Items]
Minimum tax credit refundable					0.1
Subsidiaries | Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards					85.5
Operating loss carry forwards, after application of internal revenue code section 382					$ 27.9
Scenario, Forecast
Operating Loss Carryforwards [Line Items]
Income tax refunds	$ 0.3	$ 0.3	$ 0.5	$ 1.0