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Commitments to Acquire/Dispose of Real Estate (Tables) | 6 Months Ended
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Jun. 30, 2020
Commitments To Acquire Dispose Of Real Estate [Abstract] |
Separate Agreements to Dispose | The Company has entered into separate agreements to dispose of the following (sales price and net book value in thousands):
|  | Properties |  |  | Apartment Units |  |  | Sales Price |  |  | Net Book Value |
Land Parcels (two) |  |  | — |  |  |  | — |  |  | $ | 55,150 |  |  | $ | 19,445 |
Total |  |  | — |  |  |  | — |  |  | $ | 55,150 |  |  | $ | 19,445 |

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- Definition Commitments to Acquire/Dispose of Real Estate. + References No definition available. + Details
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Namespace Prefix: | eqr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Breakdown of rental properties, units and land parcels to be disposed of subsequent to the balance sheet date per separate agreements entered into prior to the balance sheet date. + References No definition available. + Details
Name: | eqr_RealEstateToBeDisposedOfTableTextBlock
Namespace Prefix: | eqr_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration