Represents the number of properties sold during the period, not categorized as discontinued operations.

No definition available.

Name:	peak_DispositionOfPropertiesSoldNumber
Namespace Prefix:	peak_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The gross carrying amount of loans receivable that are subordinated to receivables held by other entities.

+ References

No definition available.

+ Details

Name:	peak_LoansReceivableGrossCarryingAmountMezzanine
Namespace Prefix:	peak_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Number Of Investments

+ References

No definition available.

+ Details

Name:	peak_NumberOfInvestments
Namespace Prefix:	peak_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of loans to VIE borrowers.

+ References

No definition available.

+ Details

Name:	peak_NumberOfLoanToVieBorrowers
Namespace Prefix:	peak_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	peak_NumberOfUnconsolidatedJointVenture
Namespace Prefix:	peak_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	peak_NumberOfVieBorrowersWithMarketableDebtSecurities
Namespace Prefix:	peak_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	peak_PropertiesLeasedNumber
Namespace Prefix:	peak_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	peak_VIETenantsNumber
Namespace Prefix:	peak_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	peak_VariableInterestEntityControllingOwnershipInterestThroughPartnership
Namespace Prefix:	peak_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- 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.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- 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_VariableInterestEntityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 5A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=121559654&loc=SL6759159-111685

+ Details

Name:	us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=peak_VariableInterestEntityNotPrimaryBeneficiaryTenantsWithOperatingLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=us-gaap_VariableInterestEntityNotPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=peak_VariableInterestEntityNotPrimaryBeneficiaryInvestmentInJointVentureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=peak_WaldwickMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=peak_VariableInterestEntityNotPrimaryBeneficiarySellerFinancingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=peak_SeniorHousingTripleNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=peak_HcpVenturesVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=peak_WatertownJVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=peak_LifeScienceJVsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=peak_MorganStanleyRealEstateInvestmentJVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=us-gaap_VariableInterestEntityPrimaryBeneficiaryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_InvestmentsByConsolidatedAndNonconsolidatedEntitiesAxis=peak_DownreitPartnershipsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Variable Interest Entities - Narrative (Details) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2020 property	Sep. 30, 2020 USD ($) tenant property joint_venture investment loan facility
Variable Interest Entity [Line Items]
Number of investments in senior housing development joint ventures \| investment		2
Number of properties disposed \| property	18
VIE Tenant - Operating Leases
Variable Interest Entity [Line Items]
Number of properties leased (in properties) \| property		2
Number of VIE tenants (in tenants) \| tenant		1
Unconsolidated Variable Interest Entities
Variable Interest Entity [Line Items]
Number of unconsolidated joint ventures (in joint ventures) \| joint_venture		5
Number of VIE borrowers with marketable debt securities (in joint ventures) \| joint_venture		1
Number of loans to VIE borrowers (in loans) \| loan		1
CCRC OpCo
Variable Interest Entity [Line Items]
Ownership percentage (as a percent)		49.00%
Waldwick
Variable Interest Entity [Line Items]
Ownership percentage (as a percent)		85.00%
Seller Financing Loan \| Senior Housing Triple-Net
Variable Interest Entity [Line Items]
Secured mortgage loans \| $		$ 10
Number of properties disposed \| facility		7
Term of facility		5 years
Hcp Ventures V
Variable Interest Entity [Line Items]
Ownership percentage (as a percent)		51.00%
Watertown JV
Variable Interest Entity [Line Items]
Ownership percentage (as a percent)		95.00%
Life Science JVs
Variable Interest Entity [Line Items]
Ownership percentage (as a percent)		99.00%
MSREI JV
Variable Interest Entity [Line Items]
Ownership percentage (as a percent)		51.00%
Consolidated Lessees VIE
Variable Interest Entity [Line Items]
Number of properties leased (in properties) \| property		2
DownREIT Partnerships
Variable Interest Entity [Line Items]
Number of controlling ownership interest entities as a managing member \| joint_venture		7