Exchange Accommodation Titleholder, Real Estate, Carrying Value

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- Definition

Financing Receivable, Number of Contracts Sold

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- Definition

The number of loans to VIE borrowers.

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- Definition

Number of Preferred Equity Method Investments Sold

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- Definition

Number Of Properties Acquired

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No definition available.

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- Definition

Number Of Properties Sold

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No definition available.

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- Definition

Represents number of unconsolidated joint ventures between entity and an institutional capital partner.

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No definition available.

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- Definition

Number of tenants of properties leased by entity for which the tenant is considered a VIE tenant.

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No definition available.

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- Definition

The number of VIE borrowers in which the entity has invested in marketable debt securities.

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No definition available.

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- Definition

Number of properties leased by the entity to tenants that have been identified as a VIE.

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No definition available.

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- Definition

Represents the number of controlling ownership interest entities, in which the company holds the interest and is the managing member of the partnership.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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- Definition

The number of real estate properties owned as of the balance sheet date.

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No definition available.

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- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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

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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- Definition

Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Variable Interest Entities - Narrative (Details) $ in Millions	1 Months Ended						12 Months Ended
	Dec. 31, 2021 USD ($) property tenant joint_venture	Sep. 30, 2021 loan	Jun. 30, 2021 property	May 31, 2021 property	Apr. 30, 2021 preferred_equity_investment property	Jan. 31, 2021 property	Dec. 31, 2021 USD ($) entity property tenant joint_venture loan	Dec. 31, 2020 USD ($) property loan tenant joint_venture	Dec. 31, 2019 property	Jan. 31, 2020 property	Oct. 31, 2019 property
Variable Interest Entity [Line Items]
Number of unconsolidated joint ventures	3						3
Term of facility							2 months	1 month
Property count										15
Number of loans sold \| loan							6	3
Carrying value of exchange accommodation titleholder, carrying value \| $	$ 77						$ 77	$ 813
VIE tenants-operating leases
Variable Interest Entity [Line Items]
Number of properties leased								2
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Number of unconsolidated joint ventures \| joint_venture								4
Number of VIE borrowers with marketable debt securities \| joint_venture								1
Number of VIE borrowers with debt securities and loan \| loan								1
Mezzanine
Variable Interest Entity [Line Items]
Number of loans sold \| loan		1
VIE tenants-operating leases
Variable Interest Entity [Line Items]
Number of unconsolidated joint ventures \| joint_venture	2						2
Number of properties leased								2
Number of VIE borrowers with marketable debt securities \| joint_venture	1						1
Number of VIE tenants \| tenant								1
CCRC JV Investment
Variable Interest Entity [Line Items]
Investment ownership percentage				49.00%					49.00%	49.00%
Ownership percentage								49.00%
CCRC JV Investment \| Brookedale MTCA
Variable Interest Entity [Line Items]
Number of assets sold				2
Ventures V, LLC
Variable Interest Entity [Line Items]
Ownership percentage							51.00%
Life Science JV
Variable Interest Entity [Line Items]
Ownership percentage							99.00%
MSREI MOB JV
Variable Interest Entity [Line Items]
Ownership percentage							51.00%
DownREIT Partnerships
Variable Interest Entity [Line Items]
Controlling interest entity controlling ownership interest \| entity							7
Life science
Variable Interest Entity [Line Items]
Number of properties acquired								3
Life science \| Needham Land Parcel JV
Variable Interest Entity [Line Items]
Investment ownership percentage	38.00%						38.00%
Payments to acquire equity method investments \| $	$ 13
Property count	0						0
Life science \| Life Science JV
Variable Interest Entity [Line Items]
Investment ownership percentage	49.00%						49.00%
Property count	1						1
Senior Housing Triple Net
Variable Interest Entity [Line Items]
Number of assets sold									2
Property count											43
Senior Housing Triple Net \| Loan-seller Financing
Variable Interest Entity [Line Items]
Term of facility							5 years
Senior Housing Triple Net \| Sunrise Senior Housing Portfolio
Variable Interest Entity [Line Items]
Number of assets sold			2
Senior Housing Triple Net \| Loan-seller Financing
Variable Interest Entity [Line Items]
Number of VIE tenants \| tenant	7						7
Senior Housing Operating Portfolio
Variable Interest Entity [Line Items]
Number of assets sold						16			18
Senior Housing Operating Portfolio \| Sunrise Senior Housing Portfolio
Variable Interest Entity [Line Items]
Number of assets sold			2			32
Senior Housing Operating Portfolio \| Discovery SHOP Portfolio
Variable Interest Entity [Line Items]
Number of assets sold					10
Number of preferred equity method investments sold \| preferred_equity_investment					2
Senior Housing Operating Portfolio \| Mezzanine \| Discovery SHOP Portfolio
Variable Interest Entity [Line Items]
Number of loans sold					2
Other Non-Reporting Segment \| Brookedale MTCA
Variable Interest Entity [Line Items]
Property count										13
Other Non-Reporting Segment \| Development Investment
Variable Interest Entity [Line Items]
Property count								2
Medical Office
Variable Interest Entity [Line Items]
Number of assets sold									11
Property count	4						4
Number of properties acquired							2	7
Hospital
Variable Interest Entity [Line Items]
Number of properties acquired								1