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Description of the Business (Narrative) (Details) ft² in Millions	Sep. 30, 2022 ft² storage_facility country state	Jul. 20, 2022
Shurgard
Nature Of Business [Line Items]
PSA number of self-storage facilities | storage_facility	259
Net rentable area (in square feet)	14.0
Ownership interest (percentage)	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	2,836
Net rentable area (in square feet)	202.2
Number of states with facilities | state	40
Public Storage | Commercial and Retail Space
Nature Of Business [Line Items]
Net rentable area (in square feet)	1.2

X

- Definition

Number of self-storage facilities direct and indirect interest.

+ References

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+ Details

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- Definition

Nature Of Business [Line Items]

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+ Details

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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

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- Definition

Net rentable area for properties owned.

+ References

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- Definition

The number of countries in which the entity operates as of balance sheet date.

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- Definition

The number of states the entity operates in as of the balance sheet date.

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- Details

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- Details

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- Details

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