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Commitments to Acquire/Dispose of Real Estate (Tables) | 3 Months Ended
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Mar. 31, 2016
Commitments to Acquire Dispose of Real Estate [Abstract] |
Real Estate To Be Disposed Of Text Block | The Company has entered into separate agreements to dispose of the following (sales price in thousands):
|  | Properties |  | Apartment Units |  | Sales Price
Rental Properties |  | 4 |  |  | 772 |  |  | $ | 134,450 |
Land Parcels (three) |  | — |  |  | — |  |  | 66,550 |
Total |  | 4 |  |  | 772 |  |  | $ | 201,000 |

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- Definition Commitments to Acquire/Dispose of Real Estate. + References No definition available. + Details
Name: | eqr_CommitmentsToAcquireDisposeOfRealEstateAbstract
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