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Brookdale Lease Amendments and Terminations and the Formation of Two RIDEA Joint Ventures (“Brookdale Transaction”) (Details)	0 Months Ended
	Aug. 29, 2014 property item	Mar. 31, 2015
Brookdale Senior Living
Lease Amendments and Terminations and Joint Venture Formations - disclosures
Number of components in agreement	3hcp_NumberOfComponentsInAgreement / us-gaap_CounterpartyNameAxis = hcp_BrookdaleMember
Number of facilities for which existing lease agreement is amended	153hcp_NumberOfFacilitiesForWhichExistingLeaseAgreementIsAmended / us-gaap_CounterpartyNameAxis = hcp_BrookdaleMember
Number of properties with purchase options that will be cancelled on amendment	30hcp_NumberOfPropertiesWithCancelledPurchaseOptionsForWhichExistingLeaseAgreementIsAmended / us-gaap_CounterpartyNameAxis = hcp_BrookdaleMember
Number of facilities for which existing lease agreement is terminated	49hcp_NumberOfFacilitiesForWhichExistingLeaseAgreementIsTerminated / us-gaap_CounterpartyNameAxis = hcp_BrookdaleMember
Number of properties with purchase options that will be cancelled on termination	19hcp_NumberOfPropertiesWithCancelledPurchaseOptionsForWhichExistingLeaseAgreementIsTerminated / us-gaap_CounterpartyNameAxis = hcp_BrookdaleMember
RIDEA Subsidiaries | RIDEA JV
Lease Amendments and Terminations and Joint Venture Formations - disclosures
Number of properties contributed to joint venture	48hcp_NumberOfPropertiesContributedToJointVenture / dei_LegalEntityAxis = us-gaap_SubsidiariesMember / us-gaap_TypeOfArrangementAxis = hcp_RIDEAJVMember
RIDEA Subsidiaries | Brookdale Senior Living | RIDEA JV
Lease Amendments and Terminations and Joint Venture Formations - disclosures
Ownership percentage (as a percent)		20.00%hcp_JointVentureOwnershipPercentage / us-gaap_CounterpartyNameAxis = hcp_BrookdaleMember / dei_LegalEntityAxis = us-gaap_SubsidiariesMember / us-gaap_TypeOfArrangementAxis = hcp_RIDEAJVMember
CCRC JV | RIDEA JV
Lease Amendments and Terminations and Joint Venture Formations - disclosures
Ownership percentage (as a percent)	49.00%hcp_JointVentureOwnershipPercentage / dei_LegalEntityAxis = hcp_CCRCJVMember / us-gaap_TypeOfArrangementAxis = hcp_RIDEAJVMember
Number of retirement communities	14hcp_NumberOfRetirementCommunities / dei_LegalEntityAxis = hcp_CCRCJVMember / us-gaap_TypeOfArrangementAxis = hcp_RIDEAJVMember
CCRC JV | Brookdale Senior Living | RIDEA JV
Lease Amendments and Terminations and Joint Venture Formations - disclosures
Ownership percentage (as a percent)	51.00%hcp_JointVentureOwnershipPercentage / us-gaap_CounterpartyNameAxis = hcp_BrookdaleMember / dei_LegalEntityAxis = hcp_CCRCJVMember / us-gaap_TypeOfArrangementAxis = hcp_RIDEAJVMember

X

- Definition

Represents the ownership percentage in joint venture.

+ References

No definition available.

+ Details

Name:	hcp_JointVentureOwnershipPercentage
Namespace Prefix:	hcp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	hcp_LeaseAmendmentsAndTerminationsAndJointVentureFormationsLineItems
Namespace Prefix:	hcp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The number of major components in the agreement.

+ References

No definition available.

+ Details

Name:	hcp_NumberOfComponentsInAgreement
Namespace Prefix:	hcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of facilities for which existing lease agreement is amended and restated.

+ References

No definition available.

+ Details

Name:	hcp_NumberOfFacilitiesForWhichExistingLeaseAgreementIsAmended
Namespace Prefix:	hcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of facilities for which existing lease agreement is terminated.

+ References

No definition available.

+ Details

Name:	hcp_NumberOfFacilitiesForWhichExistingLeaseAgreementIsTerminated
Namespace Prefix:	hcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Number of properties contributed to joint venture.

+ References

No definition available.

+ Details

Name:	hcp_NumberOfPropertiesContributedToJointVenture
Namespace Prefix:	hcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the number of properties with cancelled purchase options that will be cancelled on amendment of existing lease agreement.

+ References

No definition available.

+ Details

Name:	hcp_NumberOfPropertiesWithCancelledPurchaseOptionsForWhichExistingLeaseAgreementIsAmended
Namespace Prefix:	hcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the number of properties with cancelled purchase options that will be cancelled on termination of existing lease agreement.

+ References

No definition available.

+ Details

Name:	hcp_NumberOfPropertiesWithCancelledPurchaseOptionsForWhichExistingLeaseAgreementIsTerminated
Namespace Prefix:	hcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

The number of continuing care retirement communities.

+ References

No definition available.

+ Details

Name:	hcp_NumberOfRetirementCommunities
Namespace Prefix:	hcp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	dei_LegalEntityAxis=hcp_CCRCJVMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=us-gaap_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CounterpartyNameAxis=hcp_BrookdaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: