Basis of Presentation and Summary of Significant Accounting Policies (Basis Of Presentation) (Narrative) (Details) - Reclassification Adjustment - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2020
Summary Of Significant Accounting Policies [Line Items]
Increased ancillary revenue and decreased interest and other income	$ 3.9	$ 10.5
Increased ancillary cost of operations and increased interest and other income	3.8	10.0
Increased self storage cost of operations and decrease general and administrative expense	$ 3.1	$ 9.4

The reclassification adjustment which increased self storage cost of operations and decrease general and administrative expense. No impact to net income.

No definition available.

Name:	psa_SelfStorageCostOfOperationsIncreaseAndGeneralAndAdministrativeDecrease
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration