Description of Business and Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Sep. 07, 2021	Dec. 31, 2020
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Cash and cash equivalents	$ 7.5	$ 5.6
Restricted cash included in Other noncurrent assets	2.7	0.5
Cash, cash equivalents and restricted cash per Condensed Consolidated Statements of Cash Flows	$ 10.2	$ 6.1	$ 5.4	$ 11.2	$ 17.2