Segment Reporting (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Gross inpatient revenues		$ 50,121,236		$ 46,449,556	$ 40,281,027
Gross outpatient revenues		25,845,088		21,647,468	17,236,319
Total net revenues		13,399,370		12,642,117	11,558,897
Income (loss) before allocation of corporate overhead and income taxes		866,260		1,293,313	1,252,083
Allocation of corporate overhead		0		0	0
Income before income taxes		866,260		1,293,313	1,252,083
Total assets		13,494,188		13,093,543	13,476,879
Acute Care Hospital Services
Segment Reporting Information [Line Items]
Gross inpatient revenues		40,004,670	[1]	36,522,155	30,562,093
Gross outpatient revenues		24,813,718	[1]	20,633,921	16,272,520
Total net revenues		7,646,749	[1]	7,108,254	6,337,304
Income (loss) before allocation of corporate overhead and income taxes		429,664	[1]	734,666	693,427
Allocation of corporate overhead		(252,034)	[1]	(233,298)	(223,921)
Income before income taxes		177,630	[1]	501,368	469,506
Total assets		5,993,887	[1]	5,534,912	4,927,456
Behavioral Health Services
Segment Reporting Information [Line Items]
Gross inpatient revenues	[2]	10,116,566		9,927,401	9,718,934
Gross outpatient revenues	[2]	1,031,370		1,013,547	963,799
Total net revenues	[2]	5,729,758		5,503,644	5,208,722
Income (loss) before allocation of corporate overhead and income taxes	[2]	980,290		1,025,557	1,023,257
Allocation of corporate overhead	[2]	(179,936)		(172,512)	(170,849)
Income before income taxes	[2]	800,354		853,045	852,408
Total assets	[2]	7,277,293		7,250,427	7,044,617
Other
Segment Reporting Information [Line Items]
Total net revenues		22,863		30,219	12,871
Income (loss) before allocation of corporate overhead and income taxes		(543,694)		(466,910)	(464,601)
Allocation of corporate overhead		431,970		405,810	394,770
Income before income taxes		(111,724)		(61,100)	(69,831)
Total assets		$ 223,008		$ 308,204	$ 1,504,806

[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.

[2] Includes net revenues generated from our behavioral health care facilities located in the U.K. amounting to approximately $685 million in 2022, $688 million in 2021 and $584 million in 2020. Total assets at our U.K. behavioral health care facilities were approximately $1.235 billion as of December 31, 2022, $1.351 billion as of December 31, 2021 and $1.334 billion as of December 31, 2020.