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CONSOLIDATED BALANCE SHEETS OF ERP OPERATING LIMITED PARTNERSHIP (Unaudited) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
ASSETS |  |
Land | $ 5,540,352 | $ 5,581,876
Depreciable property | 23,004,377 | 22,938,426
Projects under development | 188,283 | 78,036
Land held for development | 64,781 | 114,300
Investment in real estate | 28,797,793 | 28,712,638
Accumulated depreciation | (10,163,756) | (9,810,337)
Investment in real estate, net | 18,634,037 | 18,902,301
Investments in unconsolidated entities | 341,871 | 282,049
Cash and cash equivalents | 38,298 | 50,743
Restricted deposits | 100,123 | 89,252
Right-of-use assets | 450,796 | 457,266
Other assets | 214,443 | 252,953
Total assets | 19,779,568 | 20,034,564
Liabilities: |  |
Mortgage notes payable, net | 1,634,838 | 1,632,902
Notes, net | 5,351,461 | 5,348,417
Line of credit and commercial paper | 170,884 | 409,131
Accounts payable and accrued expenses | 114,413 | 87,377
Accrued interest payable | 65,585 | 65,716
Lease liabilities | 309,182 | 311,640
Other liabilities | 292,424 | 272,596
Security deposits | 69,848 | 69,178
Distributions payable | 263,668 | 259,231
Total liabilities | 8,272,303 | 8,456,188
Commitments and contingencies |  |
Redeemable Limited Partners | 327,641 | 289,248
Partners’ Capital: |  |
Accumulated other comprehensive income (loss) | 6,914 | 5,704
Noncontrolling Interests – Partially Owned Properties | (295) | 994
Total liabilities and equity/capital | 19,779,568 | 20,034,564
ERPOP [Member] |  |
ASSETS |  |
Land | 5,540,352 | 5,581,876
Depreciable property | 23,004,377 | 22,938,426
Projects under development | 188,283 | 78,036
Land held for development | 64,781 | 114,300
Investment in real estate | 28,797,793 | 28,712,638
Accumulated depreciation | (10,163,756) | (9,810,337)
Investment in real estate, net | 18,634,037 | 18,902,301
Investments in unconsolidated entities | 341,871 | 282,049
Cash and cash equivalents | 38,298 | 50,743
Restricted deposits | 100,123 | 89,252
Right-of-use assets | 450,796 | 457,266
Other assets | 214,443 | 252,953
Total assets | 19,779,568 | 20,034,564
Liabilities: |  |
Mortgage notes payable, net | 1,634,838 | 1,632,902
Notes, net | 5,351,461 | 5,348,417
Line of credit and commercial paper | 170,884 | 409,131
Accounts payable and accrued expenses | 114,413 | 87,377
Accrued interest payable | 65,585 | 65,716
Lease liabilities | 309,182 | 311,640
Other liabilities | 292,424 | 272,596
Security deposits | 69,848 | 69,178
Distributions payable | 263,668 | 259,231
Total liabilities | 8,272,303 | 8,456,188
Commitments and contingencies |  |
Redeemable Limited Partners | 327,641 | 289,248
Partners’ Capital: |  |
Preference Units | 17,155 | 37,280
General Partner | 10,951,818 | 11,042,844
Limited Partners | 204,032 | 202,306
Accumulated other comprehensive income (loss) | 6,914 | 5,704
Total partners’ capital | 11,179,919 | 11,288,134
Noncontrolling Interests – Partially Owned Properties | (295) | 994
Total capital | 11,179,624 | 11,289,128
Total liabilities and equity/capital | $ 19,779,568 | $ 20,034,564

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Period Type: | instant

X
- Definition This element represents money paid in advance to protect the provider of a product or service, such as a lessor, against damage or nonpayment by the buyer or tenant (lessee) during the term of the agreement. Such damages may include physical damage to the property, theft of property, and other contractual breaches. Security deposits held may be interest or noninterest bearing. + References No definition available. + Details
Name: | us-gaap_SecurityDepositLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=eqr_ERPOPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |