Real Estate and Other Activities - Disposals - 2022 Activity - Additional Information (Detail) $ in Millions			3 Months Ended	9 Months Ended
	Sep. 01, 2022 USD ($) Property	Mar. 14, 2022 USD ($) Facility	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($) Facility Property
Debt Instrument [Line Items]
Gain (loss) on real estate dispositions				$ 100
Number of facilities sold | Facility				15
Number of ancillary properties sold | Property				5
Proceeds from sale of facilities				$ 522
Disposal Group, Not Discontinued Operations [Member]
Debt Instrument [Line Items]
Straight-line rent write-offs			$ 35	42
Massachusetts-based General Acute Care Hospitals [Member]
Debt Instrument [Line Items]
Number of facilities acquired | Facility		8
Purchase price of acquisition		$ 1,700
Gain (loss) on real estate dispositions		$ 600
Straight-line rent write-offs			$ 125	$ 125
Prime Healthcare Services, Inc. Facilities [Member]
Debt Instrument [Line Items]
Number of properties sold | Property	11
Proceeds from sale of facilities	$ 366