v3.26.3
Description of the Business (Details)
ft² in Millions, $ in Millions
 9 Months Ended
Sep. 30, 2026
USD ($)
ft²
storage_facility
state
country
Shurgard Self Storage Sa  
Schedule of Equity Method Investments [Line Items]  
PSA number of self-storage facilities 338
Net Rentable Square Feet | ft² 19.0
Ownership interest (in percent) 35.00%
Number of countries in which entity operates | country 7
Market value | $ $ 910
Public Storage  
Schedule of Equity Method Investments [Line Items]  
PSA number of self-storage facilities 4,347
Wholly-owned facilities 3,772
Joint venture facilities 575
Net Rentable Square Feet | ft² 308.3
Number of states with facilities | state 42
Public Storage | Commercial and Retail Space  
Schedule of Equity Method Investments [Line Items]  
Net Rentable Square Feet | ft² 0.9
Public Storage | Facilities, Managed For Third Parties  
Schedule of Equity Method Investments [Line Items]  
Net Rentable Square Feet | ft² 30.8
Number of third-party self-storage facilities managed 417
Public Storage OP, LP  
Schedule of Equity Method Investments [Line Items]  
General partner, ownership interest 96.19%
Ownership interest (in percent) 3.81%