Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Change in estimated implicit price concessions	$ 668.3	$ 728.5
Patient Services
Disaggregation of Revenue [Line Items]
Charity care program, costs	43.9	46.0	$ 50.6
Patient Services | Third-Party Payor
Disaggregation of Revenue [Line Items]
Revenue adjustment, net	5.8	6.7	$ 15.8
Receivable (payable), net	1.9	(10.3)
Receivables, current	42.6	34.4
Payables, current	$ (40.7)	$ (44.7)