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Investments in and Advances to Unconsolidated Joint Ventures (Details) (USD $)
12 Months Ended 1 Months Ended 3 Months Ended
Dec. 31, 2014
Dec. 31, 2012
Dec. 31, 2014
Sep. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Aug. 29, 2014
item
Company owned interests in entities, accounted under equity method:              
Cash paid   $ 1,701,410,000us-gaap_PaymentsToAcquireRealEstateAndRealEstateJointVentures          
Investments in and advances to unconsolidated joint ventures 605,448,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures   605,448,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures   605,448,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures 196,576,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures  
Investment reported in liabilities (960,000)hcp_EquityMethodInvestmentReportedInLiabilities   (960,000)hcp_EquityMethodInvestmentReportedInLiabilities   (960,000)hcp_EquityMethodInvestmentReportedInLiabilities    
Impairment related to goodwill 0us-gaap_GoodwillImpairmentLoss            
Impairments of investments in unconsolidated joint ventures (35,913,000)us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment            
CCRC JV              
Company owned interests in entities, accounted under equity method:              
Number of campuses             14hcp_NumberOfRetirementCommunities
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
Number of retirement communities contributed to joint venture             2hcp_NumberOfRetirementCommunitiesContributedToJointVenture
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
Fair value of retirement communities or properties contributed             162,000,000hcp_RetirementCommunitiesOrPropertiesContributedToJointVentureFairValueDisclosure
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
Carrying value of properties contributed             92,000,000hcp_CarryingValueOfPropertiesContributedToJointVenture
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
Debt related to retirement communities or properties contributed             569,000,000hcp_DebtRelatedToRetirementCommunitiesOrPropertiesContributedToJointVenture
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
Cash paid     370,000,000us-gaap_PaymentsToAcquireRealEstateAndRealEstateJointVentures
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
370,000,000us-gaap_PaymentsToAcquireRealEstateAndRealEstateJointVentures
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
     
Senior housing              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 0us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  0us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  0us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
   
Investment ownership percentage 72.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  72.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  72.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
   
CCRCJV Op Co              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 250,000,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= hcp_CcrcjvOpCoMember
  250,000,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= hcp_CcrcjvOpCoMember
  250,000,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= hcp_CcrcjvOpCoMember
   
CCRCJV Prop Co              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 210,000,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= hcp_CcrcjvPropCoMember
  210,000,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= hcp_CcrcjvPropCoMember
  210,000,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_VariableInterestEntitiesByClassificationOfEntityAxis
= hcp_CcrcjvPropCoMember
   
Brookdale Senior Living | CCRC JV              
Company owned interests in entities, accounted under equity method:              
Number of retirement communities contributed to joint venture             8hcp_NumberOfRetirementCommunitiesContributedToJointVenture
/ us-gaap_CounterpartyNameAxis
= hcp_BrookdaleMember
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
Number of unconsolidated joint ventures 2hcp_NumberOfUnconsolidatedJointVenture
/ us-gaap_CounterpartyNameAxis
= hcp_BrookdaleMember
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
           
Brookdale Senior Living | Senior housing | CCRC JV              
Company owned interests in entities, accounted under equity method:              
Carrying value of properties contributed             92,000,000hcp_CarryingValueOfPropertiesContributedToJointVenture
/ us-gaap_CounterpartyNameAxis
= hcp_BrookdaleMember
/ dei_LegalEntityAxis
= hcp_CCRCJVMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
CCRC JV Investment [Member] | Senior housing              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 456,796,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_CcrcJvInvestmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  456,796,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_CcrcJvInvestmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  456,796,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_CcrcJvInvestmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
   
Investment ownership percentage 49.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_CcrcJvInvestmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  49.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_CcrcJvInvestmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  49.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_CcrcJvInvestmentMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
   
HCR ManorCare              
Company owned interests in entities, accounted under equity method:              
Investment ownership percentage 9.40%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
  9.40%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
  9.40%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
   
Impairments of investments in unconsolidated joint ventures (36,000,000)us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
  (36,000,000)us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
  (36,000,000)us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
   
HCR ManorCare | Post-acute/skilled              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 38,915,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_PostAcuteAndSkilledNursingMember
  38,915,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_PostAcuteAndSkilledNursingMember
  38,915,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_PostAcuteAndSkilledNursingMember
   
Investment ownership percentage 9.40%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_PostAcuteAndSkilledNursingMember
  9.40%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_PostAcuteAndSkilledNursingMember
  9.40%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_PostAcuteAndSkilledNursingMember
   
Impairment related to goodwill 396,000,000us-gaap_GoodwillImpairmentLoss
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCRManorCareIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_PostAcuteAndSkilledNursingMember
           
HCP Ventures III, LLC | Medical office              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 6,778,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIIILLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
  6,778,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIIILLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
  6,778,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIIILLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
   
Investment ownership percentage 30.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIIILLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
  30.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIIILLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
  30.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIIILLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
   
HCP Ventures IV, LLC | Hospital and medical office segments              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 26,876,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIVLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_HospitalAndMedicalOfficeMember
  26,876,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIVLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_HospitalAndMedicalOfficeMember
  26,876,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIVLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_HospitalAndMedicalOfficeMember
   
Investment ownership percentage 20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIVLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_HospitalAndMedicalOfficeMember
  20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIVLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_HospitalAndMedicalOfficeMember
  20.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPVenturesIVLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_HospitalAndMedicalOfficeMember
   
HCP Life Science | Life science              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 70,333,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  70,333,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  70,333,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
   
Number of unconsolidated joint ventures 3hcp_NumberOfUnconsolidatedJointVenture
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
           
HCP Life Science | Life science | Minimum              
Company owned interests in entities, accounted under equity method:              
Investment ownership percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
   
HCP Life Science | Life science | Maximum              
Company owned interests in entities, accounted under equity method:              
Investment ownership percentage 63.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  63.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  63.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_HCPLifeSciencesMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
   
Torrey Pines Science Center, LP | Life science              
Company owned interests in entities, accounted under equity method:              
Investment ownership percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_TorreyPinesScienceCenterMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_TorreyPinesScienceCenterMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_TorreyPinesScienceCenterMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
   
Britannia Biotech Gateway, LP | Life science              
Company owned interests in entities, accounted under equity method:              
Investment ownership percentage 55.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_BritanniaBiotechGatewayLPMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  55.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_BritanniaBiotechGatewayLPMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  55.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_BritanniaBiotechGatewayLPMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
   
LASDK, LP | Life science              
Company owned interests in entities, accounted under equity method:              
Investment ownership percentage 63.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_LASDKLPMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  63.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_LASDKLPMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
  63.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_LASDKLPMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_LifescienceMember
   
Suburban Properties, LLC | Medical office              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 5,510,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SuburbanPropertiesLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
  5,510,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SuburbanPropertiesLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
  5,510,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SuburbanPropertiesLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
   
Investment ownership percentage 67.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SuburbanPropertiesLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
  67.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SuburbanPropertiesLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
  67.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SuburbanPropertiesLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_MedicalOfficeMember
   
Advances to unconsolidated joint ventures, net              
Company owned interests in entities, accounted under equity method:              
Investments in and advances to unconsolidated joint ventures 240,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_AdvancesToUnconsolidatedJointVenturesNetMember
  240,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_AdvancesToUnconsolidatedJointVenturesNetMember
  240,000us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_AdvancesToUnconsolidatedJointVenturesNetMember
   
Edgewood Assisted Living Center, LLC | Senior housing              
Company owned interests in entities, accounted under equity method:              
Investment reported in liabilities (392,000)hcp_EquityMethodInvestmentReportedInLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_EdgewoodAssistedLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  (392,000)hcp_EquityMethodInvestmentReportedInLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_EdgewoodAssistedLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  (392,000)hcp_EquityMethodInvestmentReportedInLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_EdgewoodAssistedLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
   
Investment ownership percentage 45.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_EdgewoodAssistedLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  45.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_EdgewoodAssistedLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  45.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_EdgewoodAssistedLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
   
Seminole Shores Living Center, LLC | Senior housing              
Company owned interests in entities, accounted under equity method:              
Investment reported in liabilities $ (568,000)hcp_EquityMethodInvestmentReportedInLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SeminoleShoresLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  $ (568,000)hcp_EquityMethodInvestmentReportedInLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SeminoleShoresLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  $ (568,000)hcp_EquityMethodInvestmentReportedInLiabilities
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SeminoleShoresLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
   
Investment ownership percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SeminoleShoresLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SeminoleShoresLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember
  50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis
= hcp_SeminoleShoresLivingCenterLLCMember
/ us-gaap_StatementBusinessSegmentsAxis
= hcp_SeniorHousingMember