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Commitments and Contingencies - DownREIT LLCs (Details) | Dec. 31, 2018 property
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Indemnification Agreement |
Loss Contingencies [Line Items] |
Number of properties may be contributed in the agreement | 35

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- Definition Contribution Of Property, Number Of Properties + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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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. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_IndemnificationGuaranteeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |