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Segment Disclosures - Narrative (Details) $ in Millions	Dec. 31, 2022 USD ($) property	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of facilities owned by unconsolidated joint venture \| property	19
Goodwill	$ 18	$ 18
Medical Office \| Operating segment
Segment Reporting Information [Line Items]
Goodwill	14	14
CCRC \| Operating segment
Segment Reporting Information [Line Items]
Goodwill	2	2
Other Non-Reporting Segment \| Operating segment
Segment Reporting Information [Line Items]
Goodwill	$ 2	$ 2

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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