Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Disaggregation of Revenue [Line Items]
Increase in provision for doubtful accounts			$ 42.6
Health Care, Patient Service
Disaggregation of Revenue [Line Items]
Charity care program, costs	$ 6.4	$ 8.2	50.2	$ 41.8
Health Care, Patient Service | Third-Party Payor
Disaggregation of Revenue [Line Items]
Revenue adjustment, net	4.5	$ 4.9	13.7	$ 4.9
Receivable (payable), net	(7.6)		(7.6)		$ 1.9
Receivables, current	30.9		30.9		42.6
Payables, current	$ (38.5)		$ (38.5)		$ (40.7)