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Business Combinations - Pro Forma Results of Operation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Business Acquisition [Line Items]
Business acquisition, pro forma revenue	$ 1,187.1	$ 1,067.1	$ 2,350.8	$ 2,131.0
Business acquisition, pro forma net income	91.4	$ 48.9	$ 179.3	$ 136.7
Hospital Sisters Health System And Covenant Health
Business Acquisition [Line Items]
Business combination, pro forma information, revenue of acquiree since acquisition date, actual	0.0
Business combination, pro forma information, earnings of acquiree since acquisition date, actual	$ 0.0

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