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Description of the Business (Narrative) (Details) ft² in Thousands | Dec. 31, 2022 ft² country storage_facility state | Jul. 20, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Nature Of Business [Line Items] |  |  |  |
Net rentable area (in square feet) | 204,217 |  |  |
Shurgard |  |  |  |
Nature Of Business [Line Items] |  |  |  |
PSA number of self-storage facilities | storage_facility | 266 |  |  |
Net rentable area (in square feet) | 15,000 |  |  |
Ownership interest (percentage) | 35.00% |  | 35.00% | 35.00%
Number of countries in which entity operates | country | 7 |  |  |
PSB |  |  |  |
Nature Of Business [Line Items] |  |  |  |
Ownership interest (percentage) |  | 41.00% |  |
Public Storage |  |  |  |
Nature Of Business [Line Items] |  |  |  |
PSA number of self-storage facilities | storage_facility | 2,869 |  |  |
Net rentable area (in square feet) | 204,200 |  |  |
Number of states with facilities | state | 40 |  |  |
Public Storage | Commercial and Retail Space |  |  |  |
Nature Of Business [Line Items] |  |  |  |
Net rentable area (in square feet) | 1,200 |  |  |

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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