Income Taxes - Schedule of Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	4 Months Ended	8 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 07, 2021	Dec. 31, 2023	Dec. 31, 2022
Income Tax Uncertainties [Abstract]
Balance, beginning of year	$ 19.2	$ 19.2	$ 19.3	$ 19.3
Change in tax positions for the current year	0.1	0.0	0.3	0.0
Balance, end of year	$ 19.3	$ 19.2	$ 19.6	$ 19.3