Capital Expenditure Funding, Amount Committed

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- Definition

Represents the number of properties sold during the period, not categorized as discontinued operations.

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No definition available.

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Financing Receivable, Number Of Loans Sold

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Noncash or Part Noncash, Discontinued Operations, Secured Debt Assumed by Buyer

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Number of Assets Classified as Discontinued Operations

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- Definition

Number of Preferred Equity Method Investments Sold

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No definition available.

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Number Of Properties Sold

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No definition available.

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- Definition

Proceeds from Sale of Financing Receivable, after Allowance for Credit Loss and Preferred Equity Method Investment

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No definition available.

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- Definition

The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

The cash outflow for the purchase of amounts due from customers, clients, lessees, borrowers, or others under the terms of its agreements therewith.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

The cash inflow from sale of buildings.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

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Dispositions of Real Estate and Discontinued Operations - 2021 Dispositions of Real Estate (Details)	1 Months Ended						3 Months Ended			12 Months Ended
	Sep. 30, 2021 loan	Jun. 30, 2021 USD ($) property	May 31, 2021 USD ($) property	Apr. 30, 2021 USD ($) property loan preferred_equity_investment	Feb. 28, 2021 USD ($) property	Jan. 31, 2021 USD ($) property	Mar. 31, 2023 USD ($) property	Sep. 30, 2022 USD ($) property	Jun. 30, 2022 USD ($) property	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) property
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net										$ 86,463,000	$ 9,078,000	$ 190,590,000
Carrying value of mortgages assumed by buyer in real estate dispositions										0	$ 0	143,676,000
Number of loans sold \| loan	1			2
Sunrise Senior Housing Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditure funding, amount committed										$ 40,000,000
Mortgage Debt
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Repayments of secured debt				$ 64,000,000
Number of assets classified as discontinued operations \| property			6	2
Oakmont SHOP Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of mortgages assumed by buyer in real estate dispositions				$ 107,000,000
Oakmont SHOP Portfolio \| Mortgage Debt
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed \| property				4
Other Investments \| Mortgage Debt
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Carrying value of mortgages assumed by buyer in real estate dispositions												36,000,000
Other Investments \| Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations, Abandonment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net												58,000,000
Other Investments \| Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (loss) on sales of real estate, net												39,000,000
Senior Housing Operating Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Capital expenditure funding, amount committed						$ 92,000,000
Senior Housing Operating Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of buildings						230,000,000
Payments to acquire finance receivables						150,000,000
Gain (loss) on sales of real estate, net						59,000,000
Senior Housing Operating Portfolio \| Oakmont SHOP Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of buildings				$ 564,000,000
Gain (loss) on sales of real estate, net				80,000,000
Senior Housing Operating Portfolio \| Discovery SHOP Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of buildings				334,000,000
Gain (loss) on sales of real estate, net				9,000,000
Proceeds from sale of loans and preferred equity method investments				21,000,000
Senior Housing Operating Portfolio \| Sonata SHOP Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of buildings				64,000,000
Gain (loss) on sales of real estate, net				$ 3,000,000
Senior Housing Operating Portfolio \| Other Investments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of buildings												169,000,000
Senior Housing Triple Net \| Brookdale Triple Net Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of buildings						510,000,000
Gain (loss) on sales of real estate, net						$ 169,000,000
Senior Housing Triple Net \| HRA Triple Net Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of buildings					$ 132,000,000
Gain (loss) on sales of real estate, net					$ 33,000,000
Senior Housing Triple Net \| Other Investments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of buildings												$ 24,000,000
Senior Housing Operating Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property						16
Senior Housing Operating Portfolio \| Sunrise Senior Housing Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property						32
Proceeds from sale of buildings						$ 664,000,000
Senior Housing Operating Portfolio \| Sunrise Senior Housing Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property						32
Proceeds from sale of buildings						$ 664,000,000
Payments to acquire finance receivables						$ 410,000,000
Senior Housing Operating Portfolio \| Oakmont SHOP Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property				12
Senior Housing Operating Portfolio \| Discovery SHOP Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property				10
Gain (loss) on sales of real estate, net				$ 0
Number of preferred equity method investments sold \| preferred_equity_investment				2
Senior Housing Operating Portfolio \| Discovery SHOP Portfolio \| Mezzanine
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of loans sold \| loan				2
Senior Housing Operating Portfolio \| Sonata SHOP Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property				5
Senior Housing Operating Portfolio \| SLC SHOP Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property			7
Repayments of secured debt			$ 70,000,000
Senior Housing Operating Portfolio \| SLC SHOP Portfolio \| Definitive Agreement Four
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of buildings			113,000,000
Gain (loss) on sales of real estate, net			$ 1,000,000
Senior Housing Operating Portfolio \| Other Investments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property												15
Senior Housing Operating Portfolio \| Other Investments \| Mortgage Debt
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of properties disposed \| property												1
Senior Housing Triple Net \| Sunrise Senior Housing Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property		2
Proceeds from sale of buildings		$ 80,000,000
Gain (loss) on sales of real estate, net		$ 22,000,000
Senior Housing Triple Net \| Brookdale Triple Net Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property						24
Senior Housing Triple Net \| HRA Triple Net Portfolio
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property					8
Senior Housing Triple Net \| Other Investments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property												7
Medical Office, Hospital
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property			1
Proceeds from sale of buildings			$ 226,000,000
Gain (loss) on sales of real estate, net			$ 172,000,000
Outpatient Medical
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property							2	2	3
Proceeds from sale of buildings							$ 32,000,000	$ 9,000,000	$ 27,000,000
Gain (loss) on sales of real estate, net							$ 21,000,000	$ 1,000,000	$ 10,000,000
Outpatient Medical \| Other Investments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property												10
Outpatient Medical Land Parcel
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property									1
Outpatient Medical Land Parcel \| Other Investments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of assets sold \| property												1
Proceeds from sale of buildings												$ 68,000,000