Business and Summary of Significant Accounting Policies - Additional Information (Detail) shares in Millions		1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 01, 2021 USD ($)	Apr. 30, 2022 Bed	Dec. 31, 2013	Dec. 31, 2022 USD ($) Department Hospital Bed Facility shares		Dec. 31, 2021 USD ($) Hospital shares	Dec. 31, 2020 USD ($) Hospital shares	Dec. 31, 2019 USD ($)	Aug. 31, 2022
Summary Of Business And Significant Accounting Policies [Line Items]
Effect of change on after-tax net income				$ 656,982,000		$ 987,632,000	$ 952,790,000
Number of hospital facilities | Hospital				5
Capitalized interest				$ 8,600,000		4,400,000	4,300,000
Depreciation expense				544,000,000.0		501,600,000	478,800,000
Impairment of goodwill or indefinite-lived intangible assets	$ 0						0	$ 0
Provision for asset impairment				$ 57,550,000		14,391,000	0
Behavioral health care facilities with outside owners holding non-controlling minority interest | Facility				7
Redeemable non-controlling interest balances				$ 5,000,000
Non-controlling interest balances				45,000,000
Cash flow hedges				$ 0		$ 0	$ 0
Anti-dilutive weighted average stock options excluded from computation of earnings per share | shares				6.0		4.2	6.4
Revenues				$ 13,399,370,000		$ 12,642,117,000	$ 11,558,897,000
Additional funds received from government by CARES Act						189,000,000
CARES Act and other Governmental grants and Medicare accelerated payments received							1,112,000,000
Revenues from grants							413,000,000
Deferred revenues from grants							4,000,000
MAAPP funds included in current liabilities				2,397,000		6,000
Medicare Accelerated and Advance Payment Program
Summary Of Business And Significant Accounting Policies [Line Items]
Medicare accelerated payments received						695,000,000	695,000,000
Public Health and Social Services Emergency Fund
Summary Of Business And Significant Accounting Policies [Line Items]
Governmental grants received by CARES Act							$ 417,000,000
Other (Income) Expense, Net
Summary Of Business And Significant Accounting Policies [Line Items]
Provision for asset impairment				58,000,000		14,000,000
Commercial Insurance Subsidiary
Summary Of Business And Significant Accounting Policies [Line Items]
Statutorily required capital reserves				$ 116,000,000		$ 82,000,000
Universal Health Realty Income Trust
Summary Of Business And Significant Accounting Policies [Line Items]
Number of beds available in acute care hospital | Bed		158
Number of hospital facilities | Hospital				4		3	3
Investments				$ 8,000,000		$ 9,000,000
Premier, Inc.
Summary Of Business And Significant Accounting Policies [Line Items]
Investments				78,000,000		92,000,000
Premier, Inc. | Group Purchasing Organization Agreement | Restricted Stock
Summary Of Business And Significant Accounting Policies [Line Items]
Shares vesting period			7 years
Shares vesting period start year			2014
Shares vesting period end year			2020
Market value of retained vested shares				78,000,000		92,000,000
DC
Summary Of Business And Significant Accounting Policies [Line Items]
Payments to Acquire Businesses				$ 51,000,000
DC | Hospital
Summary Of Business And Significant Accounting Policies [Line Items]
Non-controlling ownership interests				100.00%					20.00%
Nevada
Summary Of Business And Significant Accounting Policies [Line Items]
Payments to Acquire Businesses				$ 20,000,000		105,000,000
Acute Care Hospital Services
Summary Of Business And Significant Accounting Policies [Line Items]
Number of beds available in acute care hospital | Bed				282
Revenues				$ 7,646,749,000	[1]	7,108,254,000	$ 6,337,304,000
Acute Care Hospital Services | Las Vegas, Nevada
Summary Of Business And Significant Accounting Policies [Line Items]
Number of hospital facilities | Hospital				8
Number of free standing emergency departments | Department				4
Acute Care Facility | Texas | Outside Owners
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of non-controlling, minority ownership interests held by outside owners				7.00%
Acute Care Facility | Nevada | Outside Owners
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of non-controlling, minority ownership interests held by outside owners				5.00%
Behavioral Health Care Facility | Arizona | Outside Owners
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of non-controlling, minority ownership interests held by outside owners				49.00%
Behavioral Health Care Facility | Michigan | Outside Owners
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of non-controlling, minority ownership interests held by outside owners				26.00%
Behavioral Health Care Facility | Pennsylvania | Outside Owners
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of non-controlling, minority ownership interests held by outside owners				20.00%
Behavioral Health Care Facility | Ohio | Outside Owners
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of non-controlling, minority ownership interests held by outside owners				30.00%
Behavioral Health Care Facility | Washington | Outside Owners
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of non-controlling, minority ownership interests held by outside owners				20.00%
Behavioral Health Care Facility | Missouri | Outside Owners
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of non-controlling, minority ownership interests held by outside owners				25.00%
Behavioral Health Care Facility | Lowa | Outside Owners
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of non-controlling, minority ownership interests held by outside owners				48.00%
State Medicaid programs
Summary Of Business And Significant Accounting Policies [Line Items]
Revenue offset amount				$ 287,000,000		211,000,000	185,000,000
Net aggregate benefit				497,000,000		430,000,000	303,000,000
Net revenues				$ 75,000,000		$ 74,000,000	$ 73,000,000
Net Revenue | Las Vegas, Nevada | Geographic Concentration Risk
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of revenue				15.00%		16.00%	16.00%
Minimum
Summary Of Business And Significant Accounting Policies [Line Items]
Patients treated at hospitals for non elective services gross income federal poverty guidelines				200.00%
Minimum | Building and Building Improvements
Summary Of Business And Significant Accounting Policies [Line Items]
Property and equipment, useful lives				20 years
Minimum | Equipment
Summary Of Business And Significant Accounting Policies [Line Items]
Property and equipment, useful lives				3 years
Maximum
Summary Of Business And Significant Accounting Policies [Line Items]
Patients treated at hospitals for non elective services gross income federal poverty guidelines				400.00%
Maximum | Building and Building Improvements
Summary Of Business And Significant Accounting Policies [Line Items]
Property and equipment, useful lives				40 years
Maximum | Equipment
Summary Of Business And Significant Accounting Policies [Line Items]
Property and equipment, useful lives				15 years
Medicare
Summary Of Business And Significant Accounting Policies [Line Items]
Revenues				$ 1,615,762,000		$ 1,654,119,000	$ 1,690,591,000
Medicare | Acute Care Hospital Services
Summary Of Business And Significant Accounting Policies [Line Items]
Revenues				1,289,425,000		1,292,205,000	1,242,268,000
Health Care | State Medicaid programs
Summary Of Business And Significant Accounting Policies [Line Items]
Revenues				784,000,000		$ 641,000,000	$ 488,000,000
ASU 2014-09 | Revision of Prior Period Change in Accounting Principle Adjustment
Summary Of Business And Significant Accounting Policies [Line Items]
Effect of change on after-tax net income				$ 1,000,000
ASU 2014-09 | Medicare
Summary Of Business And Significant Accounting Policies [Line Items]
Percentage of estimated net revenue adjustment				1.00%		1.00%	1.00%
ASU 2016-01 | Premier, Inc. | Other (Income) Expense, Net
Summary Of Business And Significant Accounting Policies [Line Items]
Payments of cash dividends				$ 1,800,000		$ 1,700,000

[1] Included in our 2022 acute care hospital services operating segment income (loss) before allocation of corporate overhead and income taxes is a pre-tax $58 million provision for asset impairment charge to reduce the carrying value of real property assets.