Basis of Presentation and Significant Accounting Policies - Schedule of Net Operating Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net operating revenues	$ 12,211	$ 12,368	$ 11,789
Medicare
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net operating revenues	2,547	2,650	2,813
Medicaid
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net operating revenues	1,807	1,671	1,578
Medicare Managed Care
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net operating revenues	1,968	1,861	1,601
Other Third-party Payors
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net operating revenues	5,806	6,076	5,799
Self-Pay
Health Care Organization, Receivable and Revenue Disclosures [Line Items]
Net operating revenues	$ 83	$ 110	$ (2)