Real Estate and Other Activities - Disposals - 2026 Activity - Additional Information (Detail) $ in Millions			1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 16, 2026 USD ($) Facility	Aug. 12, 2026 Property	Jun. 30, 2026 USD ($) Facility	Mar. 31, 2025 USD ($)	Sep. 30, 2026 USD ($) Facility	Sep. 30, 2025 USD ($) Facility
Debt Instrument [Line Items]
Number of facilities sold | Facility			3		5	5
Proceeds from sale of property				$ 12.0	$ 31.0	$ 100.0
Net gain on sale of property			$ 6.8
Gain (loss) on sale of property					$ (1.0)	$ 4.0
Affiliated Entity [Member] | Intermountain Health [Member]
Debt Instrument [Line Items]
Number of facilities sold | Facility	2
Proceeds from sale of property	$ 371.0
Gain (loss) on sale of property	$ 159.0
Investments in Unconsolidated Real Estate Joint Ventures [Member] | Common Spirit [Member]
Debt Instrument [Line Items]
Number of properties sold | Property		5