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Summary of Significant Accounting Policies - Real Estate Assets (Details) | 12 Months Ended
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Dec. 31, 2024 store
Property, Plant and Equipment [Line Items] |
Number of properties whereby leases cannot be classified as ground or building leases | 3
Number of properties whereby leases have been assumed at rates lower than the current market rates | 9
Buildings, improvements and other intangibles | Minimum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 5 years
Buildings, improvements and other intangibles | Maximum |
Property, Plant and Equipment [Line Items] |
Estimated useful life | 39 years

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- Definition Represents the number of properties to which purchase price amounts are allocated, which cannot be classified as ground or building leases and represented as Intangible lease rights. + References No definition available. + Details
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Period Type: | duration

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- Definition Represents the number of properties related to ground leases, where the leases were assumed by the entity at rates that were lower than the current market rates for similar leases. + References No definition available. + Details
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Namespace Prefix: | exr_
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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- Details
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- Details
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- Details
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