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Real Estate Transactions - Development Activities (Details) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2020 USD ($)
Real Estate [Abstract] |
Development and redevelopment projects, amount increase (decrease) | $ 37
Development commitments | $ 398

X
- Definition Commitments, Development and Redevelopment Projects + References No definition available. + Details
Name: | peak_CommitmentsDevelopmentandRedevelopmentProjects
Namespace Prefix: | peak_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Commitments, Development and Redevelopment Projects, Increase (Decrease) + References No definition available. + Details
Name: | peak_CommitmentsDevelopmentandRedevelopmentProjectsAmountIncreaseDecrease
Namespace Prefix: | peak_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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