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

Commitments, Development and Redevelopment Projects, Increase (Decrease)

No definition available.

Name:	peak_CommitmentsDevelopmentandRedevelopmentProjectsAmountIncreaseDecrease
Namespace Prefix:	peak_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration