Acquisitions, Divestitures and Closures - Acquisitions - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Physician Practices, Clinics, Ambulatory Surgery Centers and Other Ancillary Businesses
Acquisitions and Divestitures [Line Items]
Business acquisition, cost of acquired entity, purchase price	$ 9	$ 3	$ 1

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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