Accounting Policies - Additional Information (Detail)		1 Months Ended	12 Months Ended
	Jan. 01, 2025 USD ($)	Nov. 30, 2017	Dec. 31, 2024 USD ($) Hospital EndoscopyCenter SurgeryCenter Claim State	Dec. 31, 2023 USD ($) Claim	Dec. 31, 2022 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of owned and operated hospitals | Hospital			190
Number of freestanding surgery centers | SurgeryCenter			124
Number of freestanding endoscopy centers | EndoscopyCenter			26
Number of facilities locations | State			20
General and administrative expense			$ 421,000,000	$ 353,000,000	$ 307,000,000
Adjustments to estimated reimbursement filed during respective year			42,000,000	84,000,000	56,000,000
Adjustments to estimated reimbursement filed during previous years			78,000,000	58,000,000	42,000,000
Estimated implicit price concessions recorded as reductions to revenues and accounts receivable			7,773,000,000	7,283,000,000
Charity care amount			15,942,000,000	14,425,000,000	13,615,000,000
Estimated costs of charity care			$ 1,610,000,000	$ 1,515,000,000	$ 1,498,000,000
Days revenues in accounts receivable			54 days	53 days	53 days
Depreciation expense			$ 3,294,000,000	$ 3,052,000,000.000	$ 2,941,000,000
Goodwill impairments			0	0	0
Goodwill acquired during period			170,000,000	362,000,000
Intangible assets decreased due to amortization and other adjustments			16,000,000	20,000,000
Gross carrying amount of intangible assets			274,000,000	274,000,000
Accumulated amortization of intangible assets			244,000,000	228,000,000
Gross carrying amount of indefinite-lived intangible assets			293,000,000	293,000,000
Deferred loan costs			608,000,000	559,000,000
Deferred loan costs, accumulated amortization			239,000,000	226,000,000
Amortization of debt issuance costs			35,000,000	35,000,000	29,000,000
Reserves for professional liability risks			2,131,000,000	2,089,000,000.000
Current portion of professional liability risks reserves			587,000,000	532,000,000
Provisions for losses related to professional liability risks			$ 627,000,000	619,000,000	517,000,000
Increase (decrease) in provisions for professional liability risks				$ 40,000,000	$ 55,000,000
Reserves for professional liability risks cover individual claims | Claim			2,100	2,100
Net payments of professional and general liability claims			$ 600,000,000	$ 550,000,000
Self-insured retention amount per occurrence			15,000,000
Maximum amount losses per occurrence			80,000,000
Reinsurance for professional liability risks retention minimum level of amount per occurrence			25,000,000
Reinsurance for professional liability risks retention level of amount per occurrence			35,000,000
Amounts receivable under reinsurance contracts recorded in other assets			35,000,000	34,000,000
Amounts receivable under reinsurance contracts recorded in other current assets			45,000,000	8,000,000
Foreign Currency Translation And Other [Member]
Summary Of Significant Accounting Policies [Line Items]
Goodwill increase (decrease)			$ 6,000,000	$ 50,000,000
Subsequent Event [Member]
Summary Of Significant Accounting Policies [Line Items]
Maximum amount losses per occurrence	$ 110,000,000
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%
Finite lived intangible asset useful life			10 years
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
Maximum [Member] | Building and Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives in years			40 years
Maximum [Member] | Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives in years			10 years
Minimum [Member]
Summary Of Significant Accounting Policies [Line Items]
Finite lived intangible asset useful life			3 years
Minimum [Member] | Building and Improvements [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives in years			10 years
Minimum [Member] | Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful lives in years			4 years