Real Estate and Other Activities - 2021 Activity - Additional Information (Detail) £ in Millions, SFr in Millions						9 Months Ended
	Aug. 01, 2021 USD ($) Hospital	Jul. 06, 2021 USD ($) Hospital	Jul. 06, 2021 GBP (£) Hospital	Jun. 25, 2021 GBP (£) Property	Jan. 19, 2021 GBP (£)	Sep. 30, 2020 Hospital	Jun. 30, 2021 Property	Apr. 16, 2021 CHF (SFr)	Jan. 15, 2021 USD ($)	Jan. 15, 2021 GBP (£)	Jan. 08, 2021 USD ($)
Swiss Medical Network [Member]
Business Acquisition [Line Items]
Equity investment | SFr								SFr 145
Florida [Member] | General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Purchase price of acquisition | $	$ 900,000,000
Number of facilities acquired | Hospital	5
Florida [Member] | Interim Credit Facility [Member] | General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Line of credit facility, Borrowing capacity | $	$ 650,000,000
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 | $		$ 215,000,000
Stirling, Scotland [Member] | Acute Care Hospital [Member]
Business Acquisition [Line Items]
Purchase price of acquisition			£ 15.6
Priory Group [Member]
Business Acquisition [Line Items]
Number of real estate assets acquired | Property							35
Deferred income tax 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
Ownership interest					9.90%
Waterland Private Equity Fund VII C.V. [Member] | Interim Credit Facility [Member]
Business Acquisition [Line Items]
Line of credit facility, Borrowing capacity | $									$ 900,000,000
Line of credit										£ 500.0
Waterland Private Equity Fund VII C.V. [Member] | Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Line of credit										£ 350.0
Waterland Private Equity Fund VII C.V. [Member] | United Kingdom [Member]
Business Acquisition [Line Items]
Purchase price of acquisition					£ 800.0
Steward Health Care System LLC [Member]
Business Acquisition [Line Items]
Ownership interest											9.90%
Number of facilities acquired | Hospital						2
Other loan to affiliates | $											$ 335,000,000
Steward Health Care System LLC [Member] | Florida [Member] | General Acute Care Hospitals [Member]
Business Acquisition [Line Items]
Lease extension expiration term	10 years
Lease extension expiration year	2041