| Document and Entity Information | Jan. 18, 2021 |
| Document Type | 8-K/A |
| Document Period End Date | Jan. 18, 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 |
| Amendment Description | This Amendment No. 1 on Form 8-K/A amends the Current Reports on Form 8-K filed on December 14, 2020 and January 5, 2020 (the “Original Filings”) by Public Storage (the “Company”). The Original Filings reported, among other items, the appointments of Shankh S. Mitra, David J. Neithercut, Paul Williams, Rebecca Owen, and Michelle Millstone-Shroff to the Company’s Board of Trustees (the “Board”). At the time of the Original Filings, the Board had not made any determinations regarding committee assignments for Messrs. Mitra, Neithercut, and Williams, and Mses. Owen and Shroff. The Company hereby amends the Original Filings to include information on committee assignments for Messrs. Neithercut and Williams, and Mses. Owen and Shroff in Item 5.02 below. Other than providing the additional information in Item 5.02 below, no other disclosure in the Original Filings is amended by this Form 8-K/A. |
| Amendment Flag | true |
| Entity Central Index Key | 0001393311 |
| Common Stock [Member] | |
| Title of 12(b) Security | Common Shares, $0.10 par value |
| Trading Symbol | PSA |
| Security Exchange Name | NYSE |
| Series B Preferred Stock [Member] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 5.400% Cum Pref Share, Series B, $0.01 par value |
| Trading Symbol | PSAPrB |
| Security Exchange Name | NYSE |
| Series C Preferred Stock [Member] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 5.125% Cum Pref Share, Series C, $0.01 par value |
| Trading Symbol | PSAPrC |
| Security Exchange Name | NYSE |
| Series D Preferred Stock [Member] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 4.950% Cum Pref Share, Series D, $0.01 par value |
| Trading Symbol | PSAPrD |
| Security Exchange Name | NYSE |
| Series E Preferred Stock [Member] | |
| 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 |
| Series F Preferred Stock [Member] | |
| 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 |
| Series G Preferred Stock [Member] | |
| 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 |
| Series H Preferred Stock [Member] | |
| 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 |
| Series I Preferred Stock [Member] | |
| 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 |
| Series J Preferred Stock [Member] | |
| 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 |
| Series K Preferred Stock [Member] | |
| 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 |
| Series L Preferred Stock [Member] | |
| 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 |
| Series M Preferred Stock [Member] | |
| 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 |
| Series N Preferred Stock [Member] | |
| 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 |
| Series O Preferred Stock [Member] | |
| Title of 12(b) Security | Depositary Shares Each Representing 1/1,000 of a 3.875% Cum Pref Share, Series O, $0.01 par value |
| Trading Symbol | PSAPrO |
| Security Exchange Name | NYSE |
| Notes Due 2032 [Member] | |
| Title of 12(b) Security | 0.875% Senior Notes due 2032 |
| Trading Symbol | PSA32 |
| Security Exchange Name | NYSE |
| Notes Due 2026 [Member] | |
| Title of 12(b) Security | 0.875% Senior Notes due 2026 |
| Trading Symbol | PSA26 |
| Security Exchange Name | NYSE |
