Number Of Real Estate Properties Deconsolidated Into New Joint Venture

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- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of transfers into (out of) an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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- Definition

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

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Segment Disclosures - Narrative (Details)	12 Months Ended
Segment Disclosures - Narrative (Details)	Dec. 31, 2020 USD ($) property	Dec. 31, 2019 USD ($) facility	Dec. 31, 2018 USD ($)	Mar. 31, 2020 property	Jan. 31, 2020 facility property	Oct. 31, 2019 property	Nov. 30, 2017 property
Segment Reporting Information [Line Items]
Property count \| property					15
Goodwill, impairment loss	$ 0	$ 0	$ 0
Goodwill	18,000,000	$ 17,000,000
Other Non-Reporting Segment
Segment Reporting Information [Line Items]
Number of deconsolidating assets \| facility		19
Other Non-Reporting Segment \| Operating segment
Segment Reporting Information [Line Items]
Goodwill	2,000,000	$ 4,000,000
Goodwill, transfers	(2,000,000)
Senior Housing Operating Portfolio
Segment Reporting Information [Line Items]
Number of deconsolidating assets \| property				19
Senior Housing Operating Portfolio \| Operating segment
Segment Reporting Information [Line Items]
Goodwill, transfers	(1,000,000)
Senior Housing Triple Net \| Operating segment
Segment Reporting Information [Line Items]
Goodwill, transfers	1,000,000
Medical Office \| Operating segment
Segment Reporting Information [Line Items]
Goodwill	14,000,000	$ 13,000,000
CCRC \| Operating segment
Segment Reporting Information [Line Items]
Goodwill	2,000,000
Goodwill, transfers	$ 2,000,000
Assets leased to others \| Other Non-Reporting Segment
Segment Reporting Information [Line Items]
Property count \| property				1
Assets leased to others \| Senior Housing Triple Net
Segment Reporting Information [Line Items]
Property count \| property						43	78
CCRC JV Investment \| CCRC
Segment Reporting Information [Line Items]
Property count \| facility					15
CCRC JV Investment \| Assets leased to others \| Other Non-Reporting Segment
Segment Reporting Information [Line Items]
Property count \| property				15		15
Brookedale MTCA \| Assets leased to others \| Other Non-Reporting Segment
Segment Reporting Information [Line Items]
Property count \| property					13
Brookedale MTCA \| CCRC JV Investment
Segment Reporting Information [Line Items]
Property count \| property					15
Brookedale MTCA \| CCRC JV Investment \| CCRC
Segment Reporting Information [Line Items]
Property count \| facility					13
Brookedale MTCA \| CCRC JV Investment \| Assets leased to others \| Other Non-Reporting Segment
Segment Reporting Information [Line Items]
Ownership interest acquired				100.00%
Property count \| property	13			13	13