Derivative Financial Instruments - Narrative (Details) $ in Millions	9 Months Ended
Sep. 30, 2020 USD ($)
Interest-rate Swap Contracts \| Maximum
Derivative [Line Items]
Estimate change in fair value of derivative for assumption of one percentage point change in the interest rate	$ 2

Amount of estimate change in fair value of each of the underlying derivative instruments assuming one percentage point change in the underlying derivative instruments

No definition available.

Name:	peak_EstimateChangeInFairValueOfDerivativeForAssumptionOfOnePercentagePointChangeInInterestRate
Namespace Prefix:	peak_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration