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Commitments to Acquire/Dispose of Real Estate (Tables) | 9 Months Ended
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Sep. 30, 2014
Commitments to Acquire Dispose of Real Estate [Abstract] |
Real Estate to be Acquired Table Text Block | The Company has entered into separate agreements to acquire the following (purchase price in thousands):
|  | Properties |  | Apartment Units |  | Purchase Price
Rental Properties |  | 1 |  |  | 161 |  |  | $ | 61,000 |
Land Parcel |  | — |  |  | — |  |  | 3,300 |
Total |  | 1 |  |  | 161 |  |  | $ | 64,300 |
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 |  | 3 |  |  | 529 |  |  | $ | 124,400 |
Land Parcel |  | — |  |  | — |  |  | 32,100 |
Total |  | 3 |  |  | 529 |  |  | $ | 156,500 |

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- 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, land parcels and associated units to be acquired subsequent to the balance sheet date per separate agreements entered into prior to the balance sheet date. + References No definition available. + Details
Name: | eqr_RealEstateToBeAcquiredTableTextBlockTableTextBlock
Namespace Prefix: | eqr_
Data Type: | nonnum:textBlockItemType
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