XML 101 R84.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Leases - Summary of Residential Bad Debt for Company's Properties (Details) - Residential Leases [Member] - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Lessor Lease Description [Line Items] |  |  |
Bad debt, net | $ 38,117 | $ 26,570 | $ 31,485
% of residential rental income | 1.40% | 1.00% | 1.30%

X
- Definition Operating lease lease income bad debt net. + References No definition available. + Details
Name: | eqr_OperatingLeaseLeaseIncomeBadDebtNet
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage Of Residential Rental Income + References No definition available. + Details
Name: | eqr_PercentageOfResidentialRentalIncome
Namespace Prefix: | eqr_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- 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 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479773/842-30-50-3 + Details
Name: | us-gaap_LessorLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_TypeOfArrangementAxis=eqr_ResidentialLeasesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |