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Business Combinations - Net Cash Paid for Acquisitions (Details) - Hospital Sisters Health System , Covenant Health And Piedmont Healthcare, Inc - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Business Acquisition [Line Items]
Fair value of assets acquired	$ 3.6	$ 0.3	$ 13.0	$ 0.3
Goodwill	10.6	10.4	18.1	10.4
Fair value of noncontrolling interest owned by joint venture partner	(14.2)	(10.7)	(31.1)	(10.7)
Net cash paid for acquisitions	$ 0.0	$ 0.0	$ 0.0	$ 0.0

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Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

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