Commitments and Contingencies - Additional Information (Detail) £ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2023 USD ($) Facility	Dec. 31, 2023 GBP (£)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2023 GBP (£) Facility	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability		$ 561,789,000		$ 496,416,000	$ 463,678,000	$ 368,964,000
Purchased several excess policies through commercial insurance carriers per occurrence excess claim amount		20,000,000
Self-insured for professional and general liability, current		70,000,000		74,000,000
Compensation liability claims		130,000,000		125,000,000
Compensation and related benefits		55,000,000		55,000,000
Maximum insurance deductible		5,000,000
Impact of information technology incident on revenue				13,000,000	45,000,000
Proceeds from commercial cyber insurance				41,000,000	41,000,000
Revenues reserved						17,000,000
Combined estimated future purchase obligations		327,000,000
Defined benefit pension plan estimated payments through 2089		139,000,000
Other retirement plan liabilities		26,000,000
Pre-tax decrease to reserves for self-insured workers' compensation liability claims		$ 10,000,000
Behavioral health care facilities with outside owners holding non-controlling minority interest | Facility		7								7
Behavioral health care facilities share of construction costs scheduled to be completed in 2025 | Facility		2								2
Self insurance reserve amount exhausted		$ 20,000,000
Purchased several excess policies through commercial insurance amount exhausted		20,000,000
District Facilities
Commitments and Contingencies Disclosure [Line Items]
Projected aggregate development and construction cost		439,000,000
Development and construction cost incurred		$ 210,000,000
Lease initial terms		75 years								75 years
Committment to expend		$ 5,000,000
Projected commitment expend period		12 years	12 years
Department of Human Services
Commitments and Contingencies Disclosure [Line Items]
Repayment of legal settlement amount on demand							$ 4,000,000
Amount claimed from over payments of legal settlements		$ 7,000,000					7,000,000	$ 8,000,000	$ 4,000,000
Amount claimed from over payments of legal settlements due to change in calculations	$ 2,000,000						$ 3,000,000	2,000,000
Construction Commitment
Commitments and Contingencies Disclosure [Line Items]
Combined estimated future purchase obligations		99,000,000
Revenue Cycle Data Processing Services
Commitments and Contingencies Disclosure [Line Items]
Combined estimated future purchase obligations		65,000,000
Electronic Health Records And Revenue Cycle Application
Commitments and Contingencies Disclosure [Line Items]
Combined estimated future purchase obligations		188,000,000
Other Software Applications
Commitments and Contingencies Disclosure [Line Items]
Combined estimated future purchase obligations		4,000,000
Related to Certain Equipment
Commitments and Contingencies Disclosure [Line Items]
Combined estimated future purchase obligations		165,000,000
Commercial Health Insurer and Self-insured Employee Benefit Plans
Commitments and Contingencies Disclosure [Line Items]
Combined estimated future purchase obligations		110,000,000
Healthcare Infrastructure
Commitments and Contingencies Disclosure [Line Items]
Combined estimated future purchase obligations		70,000,000
Wind Storms
Commitments and Contingencies Disclosure [Line Items]
Commercial property insurance policies covering catastrophic losses		250,000,000
All Other Events
Commitments and Contingencies Disclosure [Line Items]
Maximum insurance deductible		5,000,000
Earthquake Wind Hail and Flood
Commitments and Contingencies Disclosure [Line Items]
Maximum insurance deductible		5,000,000
Cygnet Health Care Limited
Commitments and Contingencies Disclosure [Line Items]
Property insurance | £			£ 1,500
Maximum
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability		20,000,000
Purchased several excess policies through commercial insurance carriers per occurrence		25,000,000
Commercial property insurance policies covering catastrophic losses		$ 1,000,000,000
Lease initial terms		10 years								10 years
Maximum | Wind Storms
Commitments and Contingencies Disclosure [Line Items]
Percentage of insurance deductible		5.00%								5.00%
Maximum | Earthquake | CALIFORNIA
Commitments and Contingencies Disclosure [Line Items]
Commercial property insurance policies covering catastrophic losses		$ 100,000,000
Maximum | Earthquake | OTHER STATES
Commitments and Contingencies Disclosure [Line Items]
Commercial property insurance policies covering catastrophic losses		250,000,000
Maximum | Earthquake | Faulty Zones of UNITED STATES
Commitments and Contingencies Disclosure [Line Items]
Commercial property insurance policies covering catastrophic losses		100,000,000
Maximum | Earthquake | PUERTO RICO
Commitments and Contingencies Disclosure [Line Items]
Commercial property insurance policies covering catastrophic losses		40,000,000
Maximum | Flood
Commitments and Contingencies Disclosure [Line Items]
Commercial property insurance policies covering catastrophic losses		100,000,000
Maximum | Flood | Texas
Commitments and Contingencies Disclosure [Line Items]
Commercial property insurance policies covering catastrophic losses		10,000,000
Maximum | Flood | PUERTO RICO
Commitments and Contingencies Disclosure [Line Items]
Commercial property insurance policies covering catastrophic losses		1,000,000
Minimum
Commitments and Contingencies Disclosure [Line Items]
Loss on business interruption insurance recovery		$ 25,000,000
Lease initial terms		5 years								5 years
Minimum | District Facilities
Commitments and Contingencies Disclosure [Line Items]
Committment to expend		$ 75,000,000
Minimum | Wind Storms
Commitments and Contingencies Disclosure [Line Items]
Percentage of insurance deductible		3.00%								3.00%
General And Professional Liability Insurance Policies
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability		$ 25,000,000		16,000,000	52,000,000
General and Professional Liability
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability		431,485,000		371,900,000	348,693,000	263,779,000
Subsidiaries | Professional Liability | Cygnet Health Care Limited
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability | £										£ 16
Subsidiaries | Professional Liability | Maximum
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability		20,000,000		20,000,000	20,000,000	10,000,000					$ 5,000,000	$ 5,000,000	$ 5,000,000	$ 10,000,000
Subsidiaries | General Liability | Cygnet Health Care Limited
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability | £										£ 25
Subsidiaries | General Liability | Maximum
Commitments and Contingencies Disclosure [Line Items]
Self-insured for professional and general liability		3,000,000		3,000,000	3,000,000	$ 3,000,000					$ 3,000,000	$ 3,000,000	$ 3,000,000	$ 3,000,000
Subsidiaries | General And Professional Liability Insurance Policies | Maximum
Commitments and Contingencies Disclosure [Line Items]
Purchased several excess policies through commercial insurance carriers per occurrence		$ 165,000,000		$ 162,000,000	$ 155,000,000			$ 250,000,000