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Commitments and Contingencies - Narrative (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 USD ($) property | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items] |  |  |
Third party debt collateralized by facilities, debt amount | $ 83 |  |
Third party debt collateralized by facilities, asset carrying amount | 356 |  |
Rental Expense |  |  |
Rental expense attributable to continuing operations | $ 10 | $ 10 | $ 10
Maximum remaining term of ground leases excluding extension options | 99 years |  |
Indemnification Agreement |  |  |
Loss Contingencies [Line Items] |  |  |
Number of properties may be contributed in the agreement | property | 35 |  |

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Balance Type: | na
Period Type: | instant

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- Definition This element represents the maximum contractual term of an operating ground lease as of the balance sheet date. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition The carrying value of facilities owned by the entity that are collateral for third party debt. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of debt owed by a third party for which the entity's facilities are collateral. + References No definition available. + Details
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Namespace Prefix: | hcp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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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
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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717 + Details
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- Details
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Balance Type: |
Period Type: |