Name:	psa_AggregateCoverageOfTenantsParticipating
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The aggregate maximum limit of coverage under our general liability insurance policies through third-party insurance carriers.

No definition available.

Name:	psa_AggregateLimitGeneralLiabilityCoverage
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The aggregate maximum limit of coverage under our property insurance policies through third-party insurance carriers.

No definition available.

Name:	psa_AggregateLimitPropertyLossCoverage
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The aggregate maximum losses under our property insurance policies through third-party insurance carriers.

No definition available.

Name:	psa_AggregateLossThresholdForReducedDeductibleForPropertyLoss
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Deductible for general liability insurance

No definition available.

Name:	psa_DeductibleForGeneralLiability
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Deductible for property insurance

No definition available.

Name:	psa_DeductibleForPropertyLoss
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Lessee, Operating Lease, Liability, To Be Paid, After Year Four

No definition available.

Name:	psa_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The aggregate per occurrence limit of coverage under our property insurance policies through third-party insurance carriers.

No definition available.

Name:	psa_MinimumLossPerOccurrenceToReachAggregateLossThresholdForReducedDeductibleForPropertyLoss
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Reduced Deductible For Property Loss

No definition available.

Name:	psa_ReducedDeductibleForPropertyLoss
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The number of certificate holders held by tenants at our self-storage facilities participating in our tenant insurance program at the end of the reporting period.

No definition available.

Name:	psa_TenantCertificateHoldersParticipatingIndividualInsuranceProgram
Namespace Prefix:	psa_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

The maximum individual limit amount offered under our tenant reinsurance program for goods stored by tenants at our self-storage facilities.

No definition available.

Name:	psa_TenantIndividualInsuranceLimitMaximum
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The minimum amount for which claims paid for individual events must exceed under our third-party insurance coverage.

No definition available.

Name:	psa_ThirdPartyInsuranceCoverageForClaimsPaidExceedingAmountForIndividualEvent
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The maximum amount of claims paid for individual events under our third-party insurance coverage.

No definition available.

Name:	psa_ThirdPartyInsuranceCoverageForClaimsPaidForIndividualEventLimit
Namespace Prefix:	psa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of contractual obligation to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

No definition available.

Name:	us-gaap_ContractualObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of contractual obligation to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

No definition available.

Name:	us-gaap_ContractualObligationDueInSecondYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of contractual obligation to be paid in remainder of current fiscal year.

No definition available.

Name:	us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of lessee's undiscounted obligation for lease payment for operating lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-6

Name:	us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Name:	us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Name:	us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Name:	us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Name:	us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-6