Schedule of Disaggregates Revenue by Major Source (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Disaggregation Of Revenue [Line Items]
Net revenues		$ 13,399,370		$ 12,642,117	$ 11,558,897
Percentage of Net Revenue		100.00%		100.00%	100.00%
Medicare
Disaggregation Of Revenue [Line Items]
Net revenues		$ 1,615,762		$ 1,654,119	$ 1,690,591
Percentage of Net Revenue		12.00%		13.00%	15.00%
Managed Medicare
Disaggregation Of Revenue [Line Items]
Net revenues		$ 1,560,589		$ 1,362,962	$ 1,104,930
Percentage of Net Revenue		12.00%		11.00%	10.00%
Medicaid
Disaggregation Of Revenue [Line Items]
Net revenues		$ 1,512,396		$ 1,291,692	$ 1,202,632
Percentage of Net Revenue		11.00%		10.00%	10.00%
Managed Medicaid
Disaggregation Of Revenue [Line Items]
Net revenues		$ 2,206,855		$ 1,947,263	$ 1,715,439
Percentage of Net Revenue		16.00%		15.00%	15.00%
Managed Care (HMO and PPOs)
Disaggregation Of Revenue [Line Items]
Net revenues		$ 4,012,954		$ 3,957,027	$ 3,426,937
Percentage of Net Revenue		30.00%		31.00%	30.00%
UK Revenue
Disaggregation Of Revenue [Line Items]
Net revenues		$ 684,594		$ 687,725	$ 584,000
Percentage of Net Revenue		5.00%		5.00%	5.00%
Other Patient Revenue and Adjustments, Net
Disaggregation Of Revenue [Line Items]
Net revenues		$ 745,642		$ 843,200	$ 745,344
Percentage of Net Revenue		6.00%		7.00%	6.00%
Other Non-patient Revenue
Disaggregation Of Revenue [Line Items]
Net revenues		$ 1,060,578		$ 898,129	$ 1,089,024
Percentage of Net Revenue		8.00%		7.00%	9.00%
Acute Care Hospital Services
Disaggregation Of Revenue [Line Items]
Net revenues		$ 7,646,749	[1]	$ 7,108,254	$ 6,337,304
Percentage of Net Revenue		100.00%		100.00%	100.00%
Acute Care Hospital Services | Medicare
Disaggregation Of Revenue [Line Items]
Net revenues		$ 1,289,425		$ 1,292,205	$ 1,242,268
Percentage of Net Revenue		17.00%		18.00%	20.00%
Acute Care Hospital Services | Managed Medicare
Disaggregation Of Revenue [Line Items]
Net revenues		$ 1,274,719		$ 1,118,901	$ 869,488
Percentage of Net Revenue		17.00%		16.00%	14.00%
Acute Care Hospital Services | Medicaid
Disaggregation Of Revenue [Line Items]
Net revenues		$ 719,870		$ 539,741	$ 551,551
Percentage of Net Revenue		9.00%		8.00%	9.00%
Acute Care Hospital Services | Managed Medicaid
Disaggregation Of Revenue [Line Items]
Net revenues		$ 757,488		$ 618,727	$ 491,234
Percentage of Net Revenue		10.00%		9.00%	8.00%
Acute Care Hospital Services | Managed Care (HMO and PPOs)
Disaggregation Of Revenue [Line Items]
Net revenues		$ 2,536,818		$ 2,521,089	$ 2,146,018
Percentage of Net Revenue		33.00%		35.00%	34.00%
Acute Care Hospital Services | UK Revenue
Disaggregation Of Revenue [Line Items]
Net revenues		$ 0		$ 0	$ 0
Percentage of Net Revenue		0.00%		0.00%	0.00%
Acute Care Hospital Services | Other Patient Revenue and Adjustments, Net
Disaggregation Of Revenue [Line Items]
Net revenues		$ 261,879		$ 358,458	$ 248,047
Percentage of Net Revenue		3.00%		5.00%	4.00%
Acute Care Hospital Services | Other Non-patient Revenue
Disaggregation Of Revenue [Line Items]
Net revenues		$ 806,550		$ 659,133	$ 788,698
Percentage of Net Revenue		11.00%		9.00%	12.00%
Behavioral Health Services
Disaggregation Of Revenue [Line Items]
Net revenues	[2]	$ 5,729,758		$ 5,503,644	$ 5,208,722
Percentage of Net Revenue		100.00%		100.00%	100.00%
Behavioral Health Services | Medicare
Disaggregation Of Revenue [Line Items]
Net revenues		$ 326,337		$ 361,914	$ 448,323
Percentage of Net Revenue		6.00%		7.00%	9.00%
Behavioral Health Services | Managed Medicare
Disaggregation Of Revenue [Line Items]
Net revenues		$ 285,870		$ 244,061	$ 235,442
Percentage of Net Revenue		5.00%		4.00%	5.00%
Behavioral Health Services | Medicaid
Disaggregation Of Revenue [Line Items]
Net revenues		$ 792,526		$ 751,951	$ 651,081
Percentage of Net Revenue		14.00%		14.00%	12.00%
Behavioral Health Services | Managed Medicaid
Disaggregation Of Revenue [Line Items]
Net revenues		$ 1,449,367		$ 1,328,536	$ 1,224,205
Percentage of Net Revenue		25.00%		24.00%	24.00%
Behavioral Health Services | Managed Care (HMO and PPOs)
Disaggregation Of Revenue [Line Items]
Net revenues		$ 1,476,136		$ 1,435,938	$ 1,280,919
Percentage of Net Revenue		26.00%		26.00%	25.00%
Behavioral Health Services | UK Revenue
Disaggregation Of Revenue [Line Items]
Net revenues		$ 684,594		$ 687,725	$ 584,000
Percentage of Net Revenue		12.00%		12.00%	11.00%
Behavioral Health Services | Other Patient Revenue and Adjustments, Net
Disaggregation Of Revenue [Line Items]
Net revenues		$ 483,763		$ 484,742	$ 497,297
Percentage of Net Revenue		8.00%		9.00%	10.00%
Behavioral Health Services | Other Non-patient Revenue
Disaggregation Of Revenue [Line Items]
Net revenues		$ 231,165		$ 208,777	$ 287,455
Percentage of Net Revenue		4.00%		4.00%	6.00%
Other
Disaggregation Of Revenue [Line Items]
Net revenues		$ 22,863		$ 30,219	$ 12,871
Other | Other Non-patient Revenue
Disaggregation Of Revenue [Line Items]
Net revenues		$ 22,863		$ 30,219	$ 12,871

[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.