Real Estate and Other Activities - 2021 Activity - Additional Information (Detail) € in Millions, £ in Millions, SFr in Millions, $ in Millions												12 Months Ended
	Apr. 25, 2022 USD ($) Facility	Mar. 14, 2022 USD ($) Facility	Dec. 02, 2021 EUR (€)	Oct. 21, 2021 EUR (€)	Oct. 19, 2021 USD ($)	Aug. 01, 2021 USD ($) Hospital	Jul. 06, 2021 USD ($) Hospital	Jul. 06, 2021 GBP (£) Hospital	Jun. 25, 2021 GBP (£) Property	Jan. 19, 2021 GBP (£)	Nov. 25, 2020 GBP (£)	Dec. 31, 2022 Facility	Dec. 31, 2021 Hospital	Dec. 31, 2020 Hospital	Mar. 11, 2022 USD ($)	Jun. 30, 2021 Property	Apr. 16, 2021 CHF (SFr)	Jan. 08, 2021 USD ($)
Business Acquisition [Line Items]
Deferred income tax liabilities and other liabilities, incurred															$ 26.0
General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Purchase price of acquisition	$ 80.0
Number of facilities acquired | Facility	2											6
Swiss Medical Network [Member]
Business Acquisition [Line Items]
Equity investment | SFr																	SFr 145
Massachusetts Based General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Purchase price of acquisition		$ 1,700.0
Nonrecourse Secured Debt Percentage Of Asset Value		55.00%
Number of facilities acquired | Facility		8
Lease extension expiration year		2041
Acute Care Hospital [Member]
Business Acquisition [Line Items]
Number of facilities acquired | Hospital													2
United Kingdom [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Purchase price of acquisition | £											£ 50.0
Portugal [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Purchase price of acquisition | €				€ 17.8
Florida [Member] | General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Purchase price of acquisition						$ 900.0
Number of facilities acquired | Hospital						5
Los Angeles, California [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Number of facilities acquired | Hospital							4	4
Los Angeles, California [Member] | On Campus Medical Office Buildings [Member]
Business Acquisition [Line Items]
Number of facilities acquired | Hospital							2	2
Los Angeles, California [Member] | Acute Care Hospital and On Campus Medical Office Buildings [Member]
Business Acquisition [Line Items]
Purchase price of acquisition							$ 215.0
Stirling, Scotland [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Purchase price of acquisition | £								£ 15.6
General Acute Hospital [Member] | Valencia, Spain [Member]
Business Acquisition [Line Items]
Purchase price of acquisition | €			€ 46.0
Ownership interest			50.00%
Priory Group [Member]
Business Acquisition [Line Items]
Number of real estate assets acquired | Property																35
Deferred income tax liabilities and other liabilities, incurred | £									£ 47.1
Waterland Private Equity Fund VII C.V. [Member]
Business Acquisition [Line Items]
Number of real estate assets acquired | Property									35
Payment for acquisition | £									£ 800.0
Purchase price of acquisition loan | £										£ 250.0
Waterland Private Equity Fund VII C.V. [Member] | United Kingdom [Member]
Business Acquisition [Line Items]
Purchase price of acquisition | £										£ 800.0
Waterland Private Equity Fund VII C.V. [Member] | Waterland Private Equity Fund VII C.V. Affiliate [Member]
Business Acquisition [Line Items]
Ownership interest										9.90%
Springstone Inc. [Member]
Business Acquisition [Line Items]
Purchase price of acquisition					$ 185.0
Consideration of other transaction costs					950.0
Incurred deferred income tax liabilities					$ 8.0
Steward Health Care System LLC [Member]
Business Acquisition [Line Items]
Number of facilities acquired | Hospital														2
Other loan to affiliates																		$ 335.0