| Document and Entity Information | Aug. 10, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 10, 2021 |
| Document Fiscal Year Focus | 2021 |
| Entity Registrant Name | PUBLIC STORAGE |
| Entity Incorporation, State or Country Code | MD |
| Entity File Number | 001-33519 |
| Entity Tax Identification Number | 95-3551121 |
| Entity Address, Address Line One | 701 Western Avenue |
| Entity Address, City or Town | Glendale |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 91201-2349 |
| City Area Code | 818 |
| Local Phone Number | 244-8080 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Current Fiscal Year End Date | --12-31 |
| Entity Central Index Key | 0001393311 |
| Document Fiscal Period Focus | Q2 |
| Amendment Flag | false |
| Common Shares [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Shares, $0.10 par value |
| Trading Symbol | PSA |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 4.900% Cum Pref Share, Series E, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 4.900% Cum Pref Share, Series E, $0.01 par value |
| Trading Symbol | PSAPrE |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 5.150% Cum Pref Share, Series F, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 5.150% Cum Pref Share, Series F, $0.01 par value |
| Trading Symbol | PSAPrF |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 5.050% Cum Pref Share, Series G, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 5.050% Cum Pref Share, Series G, $0.01 par value |
| Trading Symbol | PSAPrG |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 5.600% Cum Pref Share, Series H, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 5.600% Cum Pref Share, Series H, $0.01 par value |
| Trading Symbol | PSAPrH |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 4.875% Cum Pref Share, Series I, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 4.875% Cum Pref Share, Series I, $0.01 par value |
| Trading Symbol | PSAPrI |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 4.700% Cum Pref Share, Series J, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 4.700% Cum Pref Share, Series J, $0.01 par value |
| Trading Symbol | PSAPrJ |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 4.750% Cum Pref Share, Series K, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 4.750% Cum Pref Share, Series K, $0.01 par value |
| Trading Symbol | PSAPrK |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 4.625% Cum Pref Share, Series L, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 4.625% Cum Pref Share, Series L, $0.01 par value |
| Trading Symbol | PSAPrL |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 4.125% Cum Pref Share, Series M, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 4.125% Cum Pref Share, Series M, $0.01 par value |
| Trading Symbol | PSAPrM |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 3.875% Cum Pref Share, Series N, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 3.875% Cum Pref Share, Series N, $0.01 par value |
| Trading Symbol | PSAPrN |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 3.900% Cum Pref Share, Series O, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 3.900% Cum Pref Share, Series O, $0.01 par value |
| Trading Symbol | PSAPrO |
| Security Exchange Name | NYSE |
| Depositary Shares Each Representing 1/1,000 of a 4.000% Cum Pref Share, Series P, $0.01 par value [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 4.000% Cum Pref Share, Series P, $0.01 par value |
| Trading Symbol | PSAPrP |
| Security Exchange Name | NYSE |
| 0.875% Senior Notes due 2032 [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 0.875% Senior Notes due 2032 |
| Trading Symbol | PSA32 |
| Security Exchange Name | NYSE |
