Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) $ in Millions	1 Months Ended	3 Months Ended
	Nov. 30, 2017	Mar. 31, 2025 USD ($) Hospital State EndoscopyCenter SurgeryCenter	Mar. 31, 2024 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of owned and operated hospitals | Hospital		192
Number of freestanding surgery centers | SurgeryCenter		125
Number of freestanding endoscopy centers | EndoscopyCenter		26
Number of facilities locations | State		20
General and administrative expense		$ 126	$ 90
Charity care amount		3,644	3,978
Estimated costs of charity care		350	402
Revenues		$ 18,321	$ 17,339
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