Derivative Financial Instruments - Narrative (Details) $ in Millions	3 Months Ended
Mar. 31, 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	$ 1

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:	hcp_EstimateChangeInFairValueOfDerivativeForAssumptionOfOnePercentagePointChangeInInterestRate
Namespace Prefix:	hcp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration