Share-based Compensation - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	5 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2022	Dec. 31, 2024	Dec. 31, 2023
Pre-Merger Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Cash used to settle award	$ 24.7
Allocated share-based compensation expense (gain)		$ 21.9	$ 1.4	$ 16.6
Period for recognition			7 months 6 days
Unrecognized share-based compensation expense			$ 0.2
Pre-Merger Awards | Employee-Related Liabilities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based liability to be cash settled			0.6	27.6
Pre-Merger Awards | Other Noncurrent Liabilities
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based liability to be cash settled				1.2
Incentive Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated share-based compensation expense (gain)		$ 2.3	$ 6.2	$ 8.3
Period for recognition			3 years 1 month 6 days
Unrecognized share-based compensation expense			$ 22.5
Award vesting period			5 years
Granted (in shares)			0.1	0.2
Average grant date fair value (in dollars per share)			$ 43.46
Forfeited (in shares)			0.1	0.1