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Equity, Capital and Other Interests (Tables) | 9 Months Ended
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Sep. 30, 2025
Class Of Stock [Line Items] |
Changes in Issued and Outstanding Common Shares and Units | The following table presents the changes in the Company’s issued and outstanding Common Shares and Units for the nine months ended September 30, 2025 and 2024:
|  | 2025 |  |  | 2024 |
Common Shares |  |  |  |  |  |
Common Shares outstanding at January 1, |  |  | 379,475,383 |  |  |  | 379,291,417 |
Common Shares Issued: |  |  |  |  |  |
Conversion of OP Units |  |  | 2,211,299 |  |  |  | 191,019 |
Exercise of share options |  |  | 85,217 |  |  |  | 284,021 |
Employee Share Purchase Plan (ESPP) |  |  | 33,278 |  |  |  | 54,061 |
Restricted share grants, net |  |  | 208,275 |  |  |  | 186,672 |
Common Shares Other: |  |  |  |  |  |
Repurchased and retired |  |  | (1,466,818 | ) |  |  | (652,452 | )
Common Shares outstanding at September 30, |  |  | 380,546,634 |  |  |  | 379,354,738 |
Units |  |  |  |  |  |
Units outstanding at January 1, |  |  | 11,543,773 |  |  |  | 11,581,306 |
Restricted unit grants, net |  |  | 297,077 |  |  |  | 172,667 |
Conversion of OP Units to Common Shares |  |  | (2,211,299 | ) |  |  | (191,019 | )
Units outstanding at September 30, |  |  | 9,629,551 |  |  |  | 11,562,954 |
Total Common Shares and Units outstanding at September 30, |  |  | 390,176,185 |  |  |  | 390,917,692 |
Units Ownership Interest in Operating Partnership |  |  | 2.5 | % |  |  | 3.0 | %
Changes in Redemption Value of Redeemable Noncontrolling Interests - Operating Partnership/Redeemable Limited Partners | The following table presents the changes in the redemption value of the Redeemable Noncontrolling Interests – Operating Partnership/Redeemable Limited Partners for the nine months ended September 30, 2025 and 2024, respectively (amounts in thousands):
|  | 2025 |  |  | 2024 |
Balance at January 1, |  | $ | 338,563 |  |  | $ | 289,248 |
Change in market value (1) |  |  | (99,701 | ) |  |  | 64,541 |
Change in book value (1) |  |  | (57,237 | ) |  |  | (1,986 | )
Balance at September 30, |  | $ | 181,625 |  |  | $ | 351,803 |
(1) During the nine months ended September 30, 2025 and 2024, 1,912,056 and 4,398 redeemable OP Units, respectively, were converted to Common Shares. These conversions impacted both the change in market and book values.
Issued and Outstanding Preferred Shares and Preference Units | The following table presents the Company’s issued and outstanding Preferred Shares/Preference Units as of September 30, 2025 and December 31, 2024:
|  |  |  |  |  |  | Amounts in thousands |
|  |  |  | Annual |  |  |  |  |  |  |
|  | Call |  | Dividend Per |  |  | September 30, |  |  | December 31, |
|  | Date (1) |  | Share/Unit (2) |  |  | 2025 |  |  | 2024 |
Preferred Shares/Preference Units of beneficial interest, $0.01 par value; 100,000,000 shares authorized: |  |  |  |  |  |  |  |  |  |  |
8.29% Series K Cumulative Redeemable Preferred Shares/Preference Units; liquidation value $50 per share/unit; 343,100 shares/units issued and outstanding as of September 30, 2025 and December 31, 2024 |  | 12/10/2026 |  | $ | 4.145 |  |  | $ | 17,155 |  |  | $ | 17,155 |
|  |  |  |  |  |  | $ | 17,155 |  |  | $ | 17,155 |
(1) On or after the call date, redeemable Preferred Shares/Preference Units may be redeemed for cash at the option of the Company or the Operating Partnership, respectively, in whole or in part, at a redemption price equal to the liquidation price per share/unit, plus accrued and unpaid distributions, if any. (2) Dividends on Preferred Shares/Preference Units are payable quarterly.
ERPOP [Member] |
Class Of Stock [Line Items] |
Changes in Issued and Outstanding Common Shares and Units | The following table presents the changes in the Operating Partnership’s issued and outstanding General Partner Units and Limited Partner Units for the nine months ended September 30, 2025 and 2024:
|  | 2025 |  |  | 2024 |
General and Limited Partner Units |  |  |  |  |  |
General and Limited Partner Units outstanding at January 1, |  |  | 391,019,156 |  |  |  | 390,872,723 |
Issued to General Partner: |  |  |  |  |  |
Exercise of EQR share options |  |  | 85,217 |  |  |  | 284,021 |
EQR’s Employee Share Purchase Plan (ESPP) |  |  | 33,278 |  |  |  | 54,061 |
EQR’s restricted share grants, net |  |  | 208,275 |  |  |  | 186,672 |
Issued to Limited Partners: |  |  |  |  |  |
Restricted unit grants, net |  |  | 297,077 |  |  |  | 172,667 |
General Partner Other: |  |  |  |  |  |
OP Units repurchased and retired |  |  | (1,466,818 | ) |  |  | (652,452 | )
General and Limited Partner Units outstanding at September 30, |  |  | 390,176,185 |  |  |  | 390,917,692 |
Limited Partner Units |  |  |  |  |  |
Limited Partner Units outstanding at January 1, |  |  | 11,543,773 |  |  |  | 11,581,306 |
Limited Partner restricted unit grants, net |  |  | 297,077 |  |  |  | 172,667 |
Conversion of Limited Partner OP Units to EQR Common Shares |  |  | (2,211,299 | ) |  |  | (191,019 | )
Limited Partner Units outstanding at September 30, |  |  | 9,629,551 |  |  |  | 11,562,954 |
Limited Partner Units Ownership Interest in Operating Partnership |  |  | 2.5 | % |  |  | 3.0 | %

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