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Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Nov. 30, 2017 | Sep. 30, 2025 USD ($) Hospital SurgeryCenter EndoscopyCenter State | Sep. 30, 2024 USD ($) | Sep. 30, 2025 USD ($) Hospital SurgeryCenter EndoscopyCenter State | Sep. 30, 2024 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Number of owned and operated hospitals | Hospital |  | 191 |  | 191 |
Number of freestanding surgery centers | SurgeryCenter |  | 123 |  | 123 |
Number of freestanding endoscopy centers | EndoscopyCenter |  | 29 |  | 29 |
Number of facilities locations | State |  | 20 |  | 20 |
General and administrative expense |  | $ 139 | $ 111 | $ 395 | $ 301
Charity care amount |  | 4,131 | 4,001 | 11,887 | 12,091
Estimated costs of charity care |  | $ 408 | $ 416 | $ 1,153 | $ 1,233
Inpatient Services [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Performance obligations for inpatient/ outpatient services satisfied period |  |  |  | Our performance obligations for inpatient services are generally satisfied over periods that average approximately five days, and revenues are recognized based on charges incurred in relation to total expected charges |
Maximum [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Percentage of income of federal poverty level eligible for charity care | 400.00% |  |  |  |
Maximum [Member] | Outpatient Services [Member] |  |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |
Performance obligations for inpatient/ outpatient services satisfied period |  |  |  | Our performance obligations for outpatient services are generally satisfied over a period of less than one day |

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