Description of Business and Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 4.7	$ 7.8
Cash and cash equivalents included in Current assets held for sale from discontinued operations	5.4	1.3
Restricted cash included in Other noncurrent assets	7.3	3.4
Cash, cash equivalents and restricted cash per Condensed Consolidated Statements of Cash Flows	$ 17.4	$ 12.5	$ 11.8	$ 12.9