Real Estate and Other Activities - Disposals - 2023 Activity Additional Information (Detail) $ in Millions, $ in Millions							3 Months Ended			12 Months Ended
	Oct. 10, 2023 AUD ($) Facility	Jul. 11, 2023 USD ($) Facility	May 18, 2023 AUD ($) Facility	Mar. 29, 2023 Facility	Mar. 08, 2023 USD ($)	Sep. 01, 2022 USD ($)	Mar. 31, 2023 USD ($) Facility	Mar. 31, 2023 AUD ($) Facility	Dec. 31, 2021 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) Facility	Dec. 31, 2021 USD ($) Facility
Debt Instrument [Line Items]
Number of facilities sold | Facility			7								15	16
Proceeds from sale of facilities									$ 54.5		$ 522.0	$ 246.0
Net impairment charge							$ 86.0
Straight-line rent receivables							37.4
Estimated fees to sell the hospitals							8.0
Deferred gains from our interest rate swap and foreign currency translation in AOCI							$ 8.0
Derivative Instrument, Gain (Loss) Reclassified from AOCI into Income, Effective Portion, Statement of Income or Comprehensive Income [Extensible Enumeration]							Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax
General Acute Care Facility [Member] | Australia [Member]
Debt Instrument [Line Items]
Number of facilities sold | Facility				11
Australia Transaction [Member]
Debt Instrument [Line Items]
Number of facilities sold | Facility			7
Proceeds from sale of facilities	$ 470		$ 730					$ 1,200
Number of remaining facilities sold | Facility	4		11
Prime Healthcare Services, Inc. Facilities [Member]
Debt Instrument [Line Items]
Proceeds from sale of facilities						$ 366.0
Prime [Member]
Debt Instrument [Line Items]
Number of facilities sold | Facility							3	3
Proceeds from sale of facilities					$ 100.0
Non-cash impairment charge							$ 11.0			$ 11.0
Number of facilities acquired | Facility		3
Facilities acquired by the Prime		$ 100.0