XML 94 R76.htm IDEA: XBRL DOCUMENT
v3.22.4

Leases - Additional Information (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 CorporateOfficeLease Property | Dec. 31, 2021 USD ($)
Operating Leased Assets [Line Items] |  |
Increase (decrease) in lease liabilities | $ |  | $ 11.3
Increase (decrease) in ROU assets | $ |  | $ 11.3
Corporate Office Leases [Member] |  |
Operating Leased Assets [Line Items] |  |
Number of operating leases | CorporateOfficeLease | 8 |
Ground Leases [Member] |  |
Operating Leased Assets [Line Items] |  |
Number of operating properties | Property | 15 |
Number of operating properties under development | Property | 1 |
Maximum [Member] | Corporate Office Leases [Member] |  |
Operating Leased Assets [Line Items] |  |
Lease expiration dates (inclusive of applicable extension options) | 2042 |
Maximum [Member] | Ground Leases [Member] |  |
Operating Leased Assets [Line Items] |  |
Operating lease expiration year | 2118 |
Minimum [Member] | Corporate Office Leases [Member] |  |
Operating Leased Assets [Line Items] |  |
Lease expiration dates (inclusive of applicable extension options) | 2024 |
Minimum [Member] | Ground Leases [Member] |  |
Operating Leased Assets [Line Items] |  |
Operating lease expiration year | 2042 |

X
- Definition Increase decrease in lease liabilities due to change in classification. + References No definition available. + Details
Name: | eqr_IncreaseDecreaseInLeaseLiabilitiesDueToChangeInClassification
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (decrease) in ROU assets + References No definition available. + Details
Name: | eqr_IncreaseDecreaseInROUAssets
Namespace Prefix: | eqr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Lessee operating lease expiration dates inclusive of extension options. + References No definition available. + Details
Name: | eqr_LesseeOperatingLeaseExpirationDatesInclusiveOfExtensionOptions
Namespace Prefix: | eqr_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of operating leases. + References No definition available. + Details
Name: | eqr_NumberOfOperatingLeases
Namespace Prefix: | eqr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of properties subject to ground leases under development. + References No definition available. + Details
Name: | eqr_NumberOfPropertiesSubjectToGroundLeasesUnderDevelopment
Namespace Prefix: | eqr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Operating lease expiration year. + References No definition available. + Details
Name: | eqr_OperatingLeaseExpirationYear
Namespace Prefix: | eqr_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of separate real estate development properties located on land subject to ground leases. + References No definition available. + Details
Name: | us-gaap_NumberOfPropertiesSubjectToGroundLeases
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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 No definition available. + Details
Name: | us-gaap_OperatingLeasedAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |