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Business Combinations - Pro Forma Results of Operation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Hospital Sisters Health System, Covenant Health And Piedmont Healthcare, Inc
Business Acquisition [Line Items]
Business combination, pro forma information, revenue of acquiree since acquisition date, actual	$ 0.0
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual	0.0
Business acquisition, pro forma revenue	4,812.8	$ 4,379.4
Business acquisition, pro forma net income (loss)	$ 353.9	274.5
Altru Health System, Trinity Medical Center And NCH Healthcare System
Business Acquisition [Line Items]
Business combination, pro forma information, revenue of acquiree since acquisition date, actual		0.0
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual		0.0
Business acquisition, pro forma revenue		4,369.0	$ 4,039.8
Business acquisition, pro forma net income (loss)		$ 273.7	415.3
Shannon Medical, Heritage Valley & ECHD Ventures
Business Acquisition [Line Items]
Business combination, pro forma information, revenue of acquiree since acquisition date, actual			0.0
Business combination, pro forma information, earnings or loss of acquiree since acquisition date, actual			0.0
Business acquisition, pro forma revenue			4,021.1
Business acquisition, pro forma net income (loss)			$ 412.5

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