Basis of Presentation (Policies)	9 Months Ended
Basis of Presentation (Policies)	Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Marketable Securities	Marketable Securities— We record all equity securities with readily determinable fair values and for which we do not exercise significant influence at fair value and record the change in fair value for the reporting period in our condensed consolidated statements of operations. We record debt securities with readily determinable fair values and for which we do not exercise significant influence as available-for-sale securities. We carry the available-for-sale securities at fair value and report unrealized holding gains or losses, net of income taxes, in Accumulated other comprehensive income, which is a separate component of shareholders’ equity. We recognize realized gains and losses in our condensed consolidated statements of operations using the specific identification method. Unrealized losses are charged against earnings when a decline in fair value was determined to be other than temporary. Management reviews several factors to determine whether a loss is other than temporary, such as the length of time a security is in an unrealized loss position, the extent to which fair value is less than cost, the financial condition and near term prospects of the issuer, industry, or geographic area and our ability and intent to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value.
Noncontrolling Interests in Consolidated Affiliates	Noncontrolling Interests in Consolidated Affiliates— Effective July 1, 2024, we expanded our existing joint venture with Piedmont Healthcare (“Piedmont”), which we control, by contributing the assets and operations of our previously wholly-owned 70-bed hospital in Augusta, Georgia. Piedmont contributed approximately $90 million on July 1, 2024, which indirectly resulted in Piedmont obtaining a 50% ownership interest in the hospital. As a result of this transaction, we recorded a post-tax gain of $22.9 million increasing Capital in excess of par value on the condensed consolidated statement of shareholders’ equity for the nine months ending September 30, 2024. The contribution from Piedmont is included in Contributions from noncontrolling interests of consolidated affiliates on the condensed consolidated statement of cash flows for the nine months ended September 30, 2024.
Recently Adopted Accounting Pronouncements / Recent Accounting Pronouncements Not Yet Adopted	Recently Adopted Accounting Pronouncements— In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” which requires all public entities, including entities with a single reportable segment, to provide disclosure of (1) significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within each reported measure of segment profit or loss, (2) the amount and description of the composition of other segment items which reconcile to segment profit or loss, and (3) the title and position of the entity’s CODM and an explanation of how the CODM uses the reported measure(s) of segment profit or loss in assessing segment performance and allocating resources. ASU 2023-07 was effective for us beginning January 1, 2024. The disclosures required are presented in Note 12, Segment Reporting. Recent Accounting Pronouncements Not Yet Adopted— In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which intends to improve the transparency of income tax disclosures by requiring companies to (1) disclose consistent categories and greater disaggregation of information in the effective rate reconciliation and (2) provide information on income taxes paid disaggregated by jurisdiction. ASU 2023-09 is effective for our annual periods beginning January 1, 2025. We are required to apply the guidance prospectively but have the option to apply it retrospectively. While we are currently evaluating the requirements of this standard and any potential impact it may have on our condensed consolidated financial statements, we expect to update our annual tax disclosures as a result of the new standard. In November 2024, the FASB issued ASU 2024-03, “Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses,” which requires disaggregation of certain expense captions into specified categories within the notes to the financial statements for both interim and annual reporting periods. ASU 2024-03 is effective for our annual periods beginning January 1, 2027 and interim periods beginning January 1, 2028. Early adoption is permitted. We are currently evaluating the requirements of this standard and any potential impact it may have on our condensed consolidated financial statements. In September 2025, the FASB issued ASU 2025-06, “Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Targeted Improvements to the Accounting for Internal-Use Software,” which intends to modernize the guidance related to internal-use software costs to reflect current software development methods. ASU 2025-06 requires entities to begin capitalizing software costs when management authorizes and commits to funding the software project, and it is probable the project will be completed and the software will be used for its intended purpose. ASU 2025-06 is effective for our annual and interim periods beginning January 1, 2028. Early adoption is permitted. The guidance can be applied on a prospective basis, a modified basis for in-process projects, or on a retrospective basis. We are currently evaluating the requirements of this standard and any potential impact it may have on our condensed consolidated financial statements. We do not believe any other recently issued, but not yet effective, accounting standards will have a material effect on our condensed consolidated financial position, results of operations, or cash flows.