XML 110 R98.htm IDEA: XBRL DOCUMENT
v3.25.3

Subsequent Events - Disposed Properties to Unaffiliated Parties (Details) $ in Thousands |  | 9 Months Ended
--- | --- | ---
Oct. 01, 2025 USD ($) Property ApartmentUnit | Sep. 30, 2025 USD ($) ApartmentUnit | Sep. 30, 2024 Property
Subsequent Event [Line Items] |  |  |
Properties disposed | Property |  |  | 5
Property Units disposed | ApartmentUnit |  | 1,330 |
Sales Price | $ |  | $ 598,750 |
Rental Properties - Consolidated [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Properties disposed | Property |  |  | 5
Property Units disposed | ApartmentUnit |  | 1,330 |
Sales Price | $ |  | $ 594,450 |
Subsequent Events [Member] | Rental Properties - Consolidated [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Properties disposed | Property | 1 |  |
Property Units disposed | ApartmentUnit | 208 |  |
Sales Price | $ | $ 76,000 |  |

X
- Definition The total number of rental properties that the Company disposed of to unaffiliated parties during the period. + References No definition available. + Details
Name: | eqr_DisposedProperties
Namespace Prefix: | eqr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total number of rental units associated with rental properties that the company disposed of to unaffiliated third parties during the period. + References No definition available. + Details
Name: | eqr_DisposedUnits
Namespace Prefix: | eqr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash inflow from the sale of real estate investment property. + References No definition available. + Details
Name: | eqr_ProceedsFromSaleOfProperty
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 855 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483399/855-10-50-2 + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=eqr_ConsolidatedRentalPropertiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |